CN117450783B - Vortex circulation feeding smelting furnace and method - Google Patents

Abstract

The invention provides a smelting furnace and a smelting method for vortex circulation feeding, comprising the following steps: furnace body, regenerative combustion system, electric heating device and electrical system. The double-heating type smelting furnace controls the alternate circular combustion of the regenerative burner through an electric control system to melt aluminum materials, and controls the instant induction heating of an electromagnetic induction coil to melt deposited and blocked aluminum materials; the furnace body is internally divided into a heat preservation chamber, a pump chamber and a vortex circulating device, aluminum liquid flowing into the heat preservation chamber is lifted to a certain extent through the pump chamber, and further the aluminum liquid flows into the vortex circulating device to produce a scouring effect, so that aluminum materials continuously input into the furnace body flow into the heat preservation chamber under the scouring action of the aluminum liquid, and the remelting regeneration cycle of the aluminum materials is completed. The invention effectively reduces the burning loss of the aluminum material caused by direct combustion, greatly improves the smelting efficiency, and reduces the production cost and the energy consumption of enterprises on the premise of ensuring sustainable aluminum material feeding and aluminum liquid generation.

Description

A vortex circulation feeding smelting furnace and method

Technical field

The invention relates to the fields of metallurgical engineering and furnace equipment, and in particular to a smelting furnace and method for eddy current circulation feeding.

Background technique

The development of the metal smelting industry has made metal remelting and regeneration an effective way to utilize resources. By recycling and remelting scrap metal products, it not only effectively reduces the accumulation of scrap metal, but also helps reduce environmental pollution. Metal aluminum is widely used in construction, automobile manufacturing, electronic products, aerospace and other fields due to its light weight, corrosion resistance, and strong plasticity. There are various types of smelting furnaces for metal aluminum, including resistance furnaces, electric arc furnaces, induction furnaces, gas furnaces, converters, regenerative furnaces, etc. Due to different specific production needs and process requirements, the selection of smelting furnaces is different. .

Patent application CN 113108616 A discloses an integrated aluminum alloy melting and thermal insulation furnace. This patent reduces the energy loss during the aluminum scrap feeding process to a certain extent by integrating the melting chamber and the thermal insulation and static chamber. It cannot effectively solve the problem of continuous input of aluminum materials for melting, and fails to consider the problem of aluminum deposition blocking the transportation channels and vortex chambers during the transportation of liquid aluminum.

Patent application CN 112325639 A discloses a metal melting and casting furnace. This patent effectively improves the melting speed of metal and the state stability of molten metal through induction coil heating and gas heating. Since metal melting is mainly heated by gas heating furnace body and induction coil Continuous heating is required to smelt metal. This heating method has greater energy loss compared to direct heating of metal by gas.

The problems in the above patents and the gas heating in the actual production process will inevitably cause burning damage to the aluminum material, solid aluminum material deposition inside the furnace body, uneven temperature distribution in the furnace, non-circulation of aluminum liquid, and blockage of the aluminum liquid output port. , The existence of these problems not only destroys the continuity of production, but also consumes a lot of manpower, material resources, and financial resources to clear the liquid aluminum transportation channel, which greatly reduces production efficiency.

Therefore, ensuring the continuity of molten aluminum production, better aluminum liquid circulation and efficient energy utilization during the process of melting aluminum materials in the smelting furnace are currently urgent issues to be solved.

Contents of the invention

The purpose of the present invention is to provide a smelting furnace and method for eddy current circulation feeding, and a smelting method, so as to solve the problems existing in the above-mentioned prior art and ensure the continuity of the production process.

In order to achieve the above object, the present invention provides the following solution, a vortex circulation feeding smelting furnace and method, including: a furnace body, a regenerative combustion system, an electric heating device and an electronic control system. The furnace body includes an eddy current circulation device, an aluminum liquid conveying channel I, an aluminum liquid conveying channel II, an aluminum liquid conveying channel III, an aluminum chip feeding port, an aluminum ingot feeding port, a pump chamber and a holding chamber. The electric heating device It includes a primary induction coil and a secondary induction coil, an intermediate frequency power supply, an electromagnetic flowmeter and a vortex flowmeter. The pump chamber and the insulation chamber are connected through an aluminum liquid transport channel III. The vortex circulation device is connected to the pump. The chambers are connected through an aluminum liquid conveying channel I, the eddy current circulation device and the insulation chamber are connected through an aluminum liquid conveying channel II, the aluminum chip feed port is arranged above the eddy current circulation device, and the The primary induction coil is arranged outside the aluminum liquid conveying channel I, the secondary induction coil is arranged in the heat-resistant insulation layer area outside the eddy current circulation device, and the regenerative combustion system is arranged on the left side of the insulation room.

Preferably, the regenerative combustion system consists of two regenerative burners and a regenerator. The regenerative burners and the regenerator are arranged in pairs on the left side of the insulation room. The electronic control system controls the opening of the pipeline valve. Closed to achieve circulating heating of the regenerator and alternate combustion of the regenerator burner.

Furthermore, the electronic control system realizes the cyclic heating of the regenerator and the alternate combustion of the regenerator burner by controlling the opening and closing of the pipeline valve. This means that the electronic control system controls the opening of an air pipe so that the air enters a regenerator through the regenerator. The hot burner mixes with the gas for combustion, and the waste gas generated by the combustion flows through the regenerator through another regenerator and is discharged. This process causes the regenerator to be heated, and the electronic control system controls the switching of the valve through the temperature change of the heated regenerator. The air flows through the heated regenerator and combusts with the gas from another regenerator burner to form a circulating heating combustion.

Preferably, the vortex circulation device and the pump chamber are connected through the aluminum liquid transport channel I, which means that a mechanical pump inside the pump chamber lifts the aluminum liquid to a certain height, so that the outlet of the pump chamber and the inlet of the vortex circulation device There is a certain height difference. The outlet of the pump chamber is higher than the inlet of the eddy current circulation device. The upper inlet of the aluminum liquid conveying channel I is connected with the outlet of the pump chamber. The lower end outlet of the aluminum liquid conveying channel I is connected with the inlet of the eddy current circulation device. The aluminum liquid passes through The aluminum liquid conveying channel I flows from the pump chamber into the eddy current circulation device, and the radius of the aluminum liquid conveying channel I gradually becomes larger from bottom to top.

Preferably, both the regenerative combustion system and the electric heating device are controlled by an electronic control system. The regenerative combustion system operates stably for a long time, and the electric heating device heats up instantaneously with the deposition and clogging of aluminum materials.

Preferably, the primary induction coil in the electrothermal heating device includes a first induction coil, a second induction coil and a third induction coil. The first induction coil is in a spiral shape, and the second induction coil is in a "C" shape. shape, the shape of the third induction coil is "(" shape, the radial parameters of the primary induction coil change in the same direction as the radius of the aluminum liquid conveying channel I changes, that is, the radius of the aluminum liquid conveying channel I changes gradually from bottom to top, Then the radius changes of the primary induction coil gradually become larger from bottom to top.

Preferably, the primary induction coil is arranged outside the aluminum liquid conveying channel I, wherein the first induction coil is wound and arranged near the eddy current circulation device of the aluminum liquid conveying channel I, and the second induction coil is arranged in the middle area of the aluminum liquid conveying channel I , the third induction coil is arranged in the aluminum liquid conveying channel I near the pump chamber.

Preferably, the eddy current circulation device consists of an eddy current generation channel, a silicon carbide furnace body, and a heat-resistant insulation layer, in which the secondary induction coil is arranged outside the heat-resistant insulation layer. Furthermore, the spatial position distribution of the lower end of the secondary induction coil is consistent with the eddy current circulation The lower end of the aluminum liquid outlet inside the device is flush with each other, and the upper end of the secondary induction coil is slightly higher than the upper end of the aluminum liquid outlet.

Preferably, the primary induction coil arranged outside the aluminum liquid conveying channel I and the secondary induction coil arranged in the outlet area of the eddy current circulation device are respectively connected to the intermediate frequency power supply, and the electronic control system realizes the primary induction coil and the secondary induction coil by controlling the intermediate frequency power supply. instantaneous heating.

Preferably, an electromagnetic flowmeter I is arranged at the connection between the outlet of the pump chamber and the aluminum liquid conveying channel I, an electromagnetic flowmeter II is arranged at the connection between the aluminum liquid conveying channel I and the vortex generation channel, and a vortex flowmeter is arranged at the outlet of the vortex circulation device. Through the above flow The speed measurement of the meter is used to determine the deposition and clogging conditions.

Further, the velocity measurement of the flow meter is used to determine the deposition and blockage situation, which refers to the electromagnetic flow meter I and the electromagnetic flow meter II arranged in the aluminum liquid conveying channel I. When the difference percentage of the flow rate difference is greater than 5% and less than 10% When the difference percentage of the flow velocity difference is greater than 10% and less than 20%, it is determined to be a second-level deposition. When the difference percentage of the flow velocity difference is greater than 20%, it is determined to be a third-level deposition; vortex circulation When the flow rates of the vortex flowmeters arranged in the device differ by more than 20%, it is determined that the outlet is blocked.

The invention also provides a dual-heat smelting method with eddy current circulation feeding, which includes the following steps:

Step 1: In the initial operation state of the equipment, the dual-heat smelting furnace puts large aluminum ingots through the aluminum ingot feeding port and small pieces of aluminum chips through the aluminum chip feeding port according to the size of the aluminum material. The electronic control system controls the regenerative The aluminum ingot is smelted by circulating heating of the combustion system. The molten aluminum flows from the insulation chamber through the aluminum liquid conveying channel III and enters the pump chamber. The mechanical pump in the pump chamber lifts the aluminum liquid to a certain height and then enters the vortex through the aluminum liquid conveying channel I. In the generation channel, an electromagnetic flowmeter is used to record the flow rate difference between the inlet and outlet of the aluminum liquid conveying channel I when aluminum material deposition does not occur. The aluminum liquid enters the vortex generation channel through the aluminum liquid conveying channel I, and the aluminum chips are continuously input through the aluminum chip feed port. The aluminum chips are washed by the eddy current through the outlet of the vortex circulation device, enter the aluminum liquid conveying channel II, and then enter the insulation room, using a vortex flowmeter Record the flow rate when there is no blockage at the outlet of the vortex circulation device at this time. Further, the aluminum chips entering the interior of the insulation are smelted through the regenerative combustion system.

Step 2: If aluminum material deposition occurs in the aluminum liquid conveying channel I, when the first-level deposition occurs, the electronic control system controls the intermediate frequency power supply to deposit aluminum material in the first induction coil heating channel. If the aluminum material melts, the flow rate of the aluminum liquid conveying channel I If the flow rate difference in the molten aluminum conveying channel I does not recover, the electronic control system controls the intermediate frequency power supply to turn off the second induction coil and the third induction coil. The coils sequentially heat the deposited aluminum material instantaneously until the flow velocity difference in the aluminum liquid conveying channel I is restored, and the electronic control system controls the intermediate frequency power supply to be disconnected. When secondary deposition occurs, the electronic control system controls the intermediate frequency power supply to cause the first induction coil and the second induction coil to deposit aluminum material in the heating channel at the same time. If the aluminum material melts and the flow rate difference in the aluminum liquid conveying channel I is restored, the electronic control system controls the intermediate frequency power supply. disconnect, the first induction coil and the second induction coil stop heating. If the flow rate difference in the molten aluminum transport channel I of the aluminum material is not restored, the electronic control system controls the intermediate frequency power supply to cause the third induction coil to instantaneously heat the deposited aluminum material until The flow rate difference in the aluminum liquid conveying channel I is restored, and the electronic control system controls the intermediate frequency power supply to be disconnected. When third-level deposition occurs, the electronic control system controls the intermediate frequency power supply to deposit aluminum material in the heating channel of the first induction coil, the second induction coil, and the third induction coil until the flow rate difference in the aluminum liquid conveying channel I is restored, and the electronic control system controls the intermediate frequency Power is disconnected. If any deposition occurs in the aluminum liquid delivery channel I, repeat step 2.

Step 3: As aluminum chips are fed into the eddy current circulation device, if aluminum chips accumulate and block the outlet, the electronic control system controls the intermediate frequency power supply to cause the secondary induction coil to heat the aluminum material. The aluminum material will melt at the blockage, and the flow rate will be restored. The electronic control system controls The intermediate frequency power supply is disconnected and the secondary induction coil stops heating. If the aluminum material is blocked at the outlet of the vortex circulation device, repeat this step, and steps two and three are independent of each other and do not affect each other.

Compared with the existing technology, the present invention has achieved the following technical effects: The present invention provides a smelting furnace and method for eddy current circulation feeding, which remelts and regenerates aluminum materials by using eddy current circulation, heat storage and multi-stage induction heating. Compared with existing resistance furnaces, induction furnaces and gas furnaces, this dual-heat smelting furnace can not only smelt larger aluminum ingots through filtering and staged combustion through different gap screens, but also can continuously smelt smaller aluminum chips. While saving fuel, it also reduces aluminum material burning loss caused by direct combustion. The combination of a regenerative combustion system and an electric heating device greatly improves the smelting efficiency, ensures the sustainability of aluminum material placement and aluminum liquid generation, and reduces enterprise production costs. At the same time, the multi-stage instantaneous induction electric heating method through multiple coils inside the primary induction coil effectively prevents channel blockage caused by the deposition of aluminum materials in the aluminum liquid delivery channel, reduces energy loss, and improves the safety of the equipment.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the drawings of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of the overall structure of the present invention.

Figure 2 is a partial front view of the present invention.

Figure 3 is a diagram showing the layout of the electric heating device of the present invention.

Figure 4 is a partial cross-sectional view of the vortex circulation device of the present invention.

Figure 5 is a structural diagram of the primary induction coil device of the present invention.

Figure 6 is a flow chart of the dual-heat melting process of the present invention.

Figure 7 is a schematic diagram of the overall structure after additions and modifications of the present invention.

Figure 8 is a partial schematic front view of the invention after additions and modifications.

Among them, 1--furnace body; 101--eddy current circulation device; 1011--eddy current generation channel; 1012--silicon carbide furnace body; 1013--heat-resistant insulation layer; 1014--aluminum chip feed port; 102-- Aluminum liquid conveying channel I; 103--Pump room; 104--Aluminum liquid conveying channel II; 105--Aluminum liquid conveying channel III; 106--Insulated room; 1061--Aluminum ingot feeding port; 1062--First-level screen Net; 1063--Secondary screen; 2--Regenerative combustion system; 201--Regenerative burner; 202--Regenerator; 3--Electric heating device; 301--Intermediate frequency power supply; 302- - Primary induction coil; 3021--First induction coil; 3022--Second induction coil; 3023--Third induction coil; 303--Secondary induction coil; 304--Electromagnetic flowmeter I; 305--Electromagnetic Flowmeter II; 306--Vortex flowmeter; 4--Electronic control system.

Detailed ways

Embodiment 1

As a first embodiment of the present invention, as shown in Figures 1 to 5, a vortex circulation feeding melting furnace and method include a furnace body 1, a regenerative combustion system 2, an electric heating device 3 and an electronic control system 4 . Among them, the regenerative combustion system 2 is placed as a whole on the left side of the furnace body 1, the electric heating device 3 is configured on the internal device of the furnace body 1, and the electronic control system 4 electrically communicates with the regenerative combustion system 2 and the electric heating device 3. Connection, through the above configuration and connection method, independent control of the regenerative combustion system 2 and the electric heating device 3 can be achieved.

In this embodiment, the furnace body includes an eddy current circulation device 101, an aluminum liquid conveying channel I 102, an aluminum liquid conveying channel II 104, an aluminum liquid conveying channel III 105, a pump chamber 103 and an insulating chamber 106. Between the pump chamber 103 and the insulating chamber 106 The pump chamber 103 and the vortex circulation device 101 are connected through the aluminum liquid delivery channel I 102, and the vortex circulation device 101 and the insulation chamber 106 are connected through the aluminum liquid delivery channel II 104, where the pump chamber 103 The aluminum liquid is raised to a certain height through a mechanical pump, so that there is a certain height difference between the pump chamber 103 and the inlet of the vortex circulation device 101. The aluminum liquid flows from the pump chamber 103 into the vortex circulation device 101 through the aluminum liquid transport channel I102, and then flows into the vortex circulation device 101. Eddy currents are generated inside the circulation device 101. Through the connection method of the above device, the aluminum chips put in from the aluminum chip feed port 1014 are washed by the eddy current and enter the insulation chamber 106. After melting, the circulation of the aluminum liquid is formed through the above connection method. The process ensures the continuous input of aluminum chips and effectively reduces the burning loss caused by directly inputting aluminum chips into a single feeding port.

Further, the regenerative combustion system 2 is mainly composed of two regenerative burners 201 and two regenerators 202. The regenerative burners 201 and the regenerators 202 are respectively arranged in pairs on the left side of the insulation room 106. The control system 4 controls the opening of a certain air duct so that the air passes through the regenerator I and enters a regenerator burner I to mix with the gas for combustion to achieve the purpose of melting the aluminum material. The waste gas generated by the combustion flows through another regenerator burner II. It is discharged through the regenerator II. This process causes the regenerator II to be heated. The electronic control system 4 controls the switching of the valve through the temperature change of the heated regenerator II so that the air flows through the heated regenerator II and another regenerator burner. Ⅱ With gas combustion, through the above cyclic heating and combustion method, the heat of the exhaust gas is not only reabsorbed by the regenerator 202, but also the air is heated through the regenerator 202, making the regenerator burner 201 burn more fully, effectively reducing gas loss.

The electric heating device 3 includes a primary induction coil 302 and a secondary induction coil 303, an intermediate frequency power supply 301, an electromagnetic flowmeter and a vortex flowmeter 306. The primary induction coil 302 is further divided into a first induction coil 3021, a second induction coil 3022 and a third induction coil 3023. The main reason for subdividing the primary induction coil 302 is to solve the problem of the aluminum liquid passing through the aluminum liquid delivery channel I102. Different degrees of deposits are formed during the process. Due to the characteristics of the upper port of the molten aluminum transport channel I102 being large and the lower port being small, deposits are more likely to form at the lower outlet, so the primary induction coil 302 is subdivided. According to the channel deposition conditions inside the aluminum liquid conveying channel I102, different coil shapes are designed. The first induction coil 3021 is spiral in shape and is wound around the eddy current circulation device 101 in the aluminum liquid conveying channel I102; the second induction coil 3022 is in the shape of "C" and is arranged in the middle area of the aluminum liquid conveying channel I102; the third induction coil 3023 is in the shape of "(" and is arranged in the aluminum liquid conveying channel I102 near the pump chamber 103. Through the above shape design and position arrangement It can effectively solve different aluminum material deposition conditions inside the aluminum liquid conveying channel I102.

Further, the eddy current circulation device 101 is divided into an eddy current generating channel 1011, a silicon carbide furnace body 1012, a heat-resistant insulation layer 1013, and an aluminum chip feed port 1014. During the feeding process of aluminum chips through the aluminum chip feed port 1014, it is most likely to form a blockage at the outlet of the eddy current circulation device 101. Therefore, the secondary induction coil 303 is arranged outside the heat-resistant insulation layer 1013, and the lower end of the secondary induction coil 303 is spaced The position distribution is flush with the lower end of the aluminum liquid outlet inside the eddy current circulation device 101, and the upper end of the secondary induction coil 303 is slightly higher than the upper end of the aluminum liquid outlet. Through this arrangement, easy-to-block locations can be cleared in a targeted manner.

In addition, in order to determine the deposition and clogging situation, an electromagnetic flowmeter I304 is arranged at the connection between the outlet of the pump chamber 103 and the aluminum liquid conveying channel I102, an electromagnetic flowmeter II305 is arranged at the connection between the aluminum liquid conveying channel I102 and the eddy current generating channel 1011, and the eddy current circulation device 101 A vortex flowmeter 306 is arranged at the outlet. By monitoring the electromagnetic flowmeter I and electromagnetic flowmeter II arranged in the aluminum liquid conveying channel I102, when the difference percentage of the flow rate difference is greater than 5% and less than 10%, it is determined to be a first-level deposition. When the difference percentage of the flow rate difference When the percentage is greater than 10% and less than 20%, it is determined to be secondary deposition. When the difference percentage of the flow rate difference is greater than 20%, it is determined to be third-level deposition; when the flow rate difference between the vortex flowmeters arranged in the vortex circulation device is greater than 20% , it is determined that the outlet is blocked. This is used as the basis for the electronic control system to control the intermediate frequency power supply to achieve instantaneous heating of the primary induction coil and the secondary induction coil, thereby reducing unnecessary energy loss.

At the same time, the present invention provides a dual-heat smelting method based on eddy current circulation feeding, as shown in Figure 6, including the following steps:

Step 1: Aluminum materials are classified and melted. First, the aluminum materials are pre-processed according to the volume of the aluminum materials, and the aluminum materials are divided into large aluminum ingots and finely divided aluminum scraps; the melting furnace equipment is initially operated, and the large aluminum ingots are first processed from The aluminum ingot feeding port 1061 is put in, and the electronic control system 4 controls the opening of an air duct so that the air passes through the regenerator I and enters a regenerative burner I to mix with the gas for combustion. The exhaust gas generated by the combustion flows through another regenerative burner II. It is discharged through the regenerator II. This process causes the regenerator II to be heated. The electronic control system 4 controls the switching of the valve through the temperature change of the heated regenerator II so that the air flows through the heated regenerator II and another regenerator burner. Ⅱ Combined with gas combustion, this method achieves cyclic heating and melting of aluminum materials.

Step 2: The aluminum liquid vortex circulates and the relevant data of the flow meter is recorded. When the aluminum ingot in the insulation chamber 106 is melted into liquid aluminum, the liquid aluminum enters the pump chamber 103 through the liquid aluminum transport channel III 105, and the mechanical pump inside the pump chamber 103 pumps the aluminum into the pump chamber 103. The liquid is raised to a certain height, and then the aluminum liquid enters the vortex generation channel 1011 from the pump chamber 103 through the aluminum liquid transport channel I102. Record the aluminum liquid flow rate of the electromagnetic flowmeter I304 and the electromagnetic flowmeter II305 when no aluminum material deposition occurs at this time, and Obtain the flow velocity difference ΔV1; after the aluminum liquid passes through the eddy current generation channel 1011, a vortex is formed, and the aluminum chips are put in through the aluminum chip feed port 1014. The scouring effect of the aluminum chips affected by the eddy current passes through the silicon carbide furnace body 1012 outlet, and the record does not appear at this time. The flow rate V1 of the vortex flowmeter 306 during adhesion and deposition; further, the solid-liquid mixture of aluminum enters the insulation chamber 106 and melts due to the eddy current erosion.

Step 3: Aluminum material is deposited and cleaned in the aluminum liquid conveying channel. With the input of aluminum material, the aluminum liquid will inevitably appear in the insulating chamber 106 during the eddy current circulation process, carrying aluminum chips into the pump chamber 103, and the aluminum liquid will follow the The temperature decrease further causes deposition in the aluminum liquid conveying channel I102. When deposition occurs, the electromagnetic flowmeter I and the electromagnetic flowmeter II arranged at both ends of the aluminum liquid conveying channel I102 are bound to change, and the flow rate difference between the two flowmeters is recorded at this time. ΔV2, when When, that is, first-level deposition occurs in the aluminum liquid conveying channel I102, the electronic control system 4 controls the intermediate frequency power supply 301 to deposit aluminum material in the first induction coil 3021 heating channel. If the aluminum material melts and the flow rate difference in the aluminum liquid conveying channel I102 is restored, the electronic control system System 4 controls the intermediate frequency power supply 301 to disconnect, and the first induction coil 3021 stops heating. If the flow rate difference in the molten aluminum liquid conveying channel I 102 of the aluminum material is not restored, the electronic control system 4 controls the intermediate frequency power supply 301 to cause the second induction coil and the third induction coil to The deposited aluminum material is instantaneously heated in sequence until the flow velocity difference in the aluminum liquid conveying channel I102 is restored, and the electronic control system 4 controls the intermediate frequency power supply 301 to be disconnected; when/> When, that is, secondary deposition occurs in the aluminum liquid conveying channel I102, the electronic control system 4 controls the intermediate frequency power supply 301 to cause the first induction coil and the second induction coil to simultaneously heat the channel to deposit aluminum material. If the aluminum material melts, the flow rate difference in the aluminum liquid conveying channel I102 After recovery, the electronic control system 4 controls the intermediate frequency power supply 301 to disconnect, and the first and second induction coils stop heating. If the flow rate difference of the molten aluminum liquid conveying channel I102 does not recover, the electronic control system 4 controls the intermediate frequency power supply 301 to cause the third induction coil to stop heating. The induction coil 3023 instantaneously heats the deposited aluminum material until the flow velocity difference in the aluminum liquid conveying channel I102 is restored, and the electronic control system 4 controls the intermediate frequency power supply 301 to be disconnected; when/> When, that is, three-level deposition occurs in the aluminum liquid conveying channel I102, the electronic control system 4 controls the intermediate frequency power supply 301 to cause the first, second, and third induction coils to simultaneously heat the aluminum material deposited in the channel until the aluminum material melts. The flow rate of the aluminum liquid conveying channel I102 When the difference is restored, the electronic control system 4 controls the intermediate frequency power supply 301 to be disconnected.

This step effectively reduces the power loss and increases the safety of the equipment by determining the lower deposition state and instantaneously controlling the intermediate frequency power supply 301 by the electronic control system 4 .

Step 4: The eddy current circulation device is clogged and unblocked. When the aluminum chips are put into the silicon carbide furnace body 1012 from the aluminum chip feed port 1014, they will be washed by the eddy current of the high-temperature aluminum liquid and oxidized, and will adhere to the aluminum liquid outlet of the silicon carbide furnace body 1012. , causing the channel mouth to be blocked, record the flow velocity V2 of the vortex flowmeter 306 at this time, and also when At this time, the electronic control system 4 controls the intermediate frequency power supply 301 to cause the secondary induction coil 303 to perform instantaneous induction heating, causing the adhered aluminum material in the eddy current circulation device 101 to melt. When the flow rate of the vortex flowmeter 306 returns to V1, the electronic control system 4 controls the intermediate frequency power supply. 301 stops heating the secondary induction coil 303.

In this step, by setting the flow rate difference, when the clogging state has a greater impact on the eddy current circulation device 101, the electronic control system 4 controls the intermediate frequency power supply 301 to cause the secondary induction coil 303 to perform instantaneous induction heating, ensuring the reliability of aluminum chip feeding. Persistent.

Step 5: Continue to put the aluminum material into melting. If the situation in steps 3 and 4 does not occur, continue to put in the aluminum material according to steps 1 and 2 to achieve the melting of the aluminum material during the eddy current cycle; further, if the situation in step 3 and step 4 occurs, In either case of step 3 or step 4, instantaneous induction heating is performed according to step 3 or step 4, and steps 3 and 4 are independent of each other and do not affect each other.

This embodiment provides a smelting furnace and method for eddy current circulation feeding, including a furnace body 1, a regenerative combustion system 2, an electric heating device 3 and an electronic control system 4. Among them, the regenerative combustion system 2 is placed as a whole on the left side of the furnace body 1, the electric heating device 3 is configured on the internal device of the furnace body 1, and the electronic control system 4 electrically communicates with the regenerative combustion system 2 and the electric heating device 3. Connection, through the above configuration and connection method, independent control of the regenerative combustion system 2 and the electric heating device 3 can be achieved.

In this embodiment, the furnace body includes an eddy current circulation device 101, an aluminum liquid conveying channel I 102, an aluminum liquid conveying channel II 104, an aluminum liquid conveying channel III 105, a pump chamber 103 and an insulating chamber 106. Between the pump chamber 103 and the insulating chamber 106 The pump chamber 103 and the vortex circulation device 101 are connected through the aluminum liquid conveyance channel III 105, and the vortex circulation device 101 and the insulation chamber 106 are connected through the aluminum liquid conveyance channel II 104, where the pump chamber 103 The aluminum liquid is raised to a certain height by a mechanical pump, so that there is a certain height difference between the pump chamber 103 and the inlet of the vortex circulation device 101. The aluminum liquid flows from the pump chamber 103 into the vortex circulation device 101 through the aluminum liquid transport channel I102, and then in the vortex circulation Eddy currents are generated inside the device 101. Through the connection method of the above device, the aluminum chips put in from the aluminum chip feed port 1014 are washed by the eddy current and enter the insulation chamber 106. After melting, the circulation of the aluminum liquid is formed through the above connection method. This process This ensures the continuous input of aluminum chips and effectively reduces the burning loss caused by direct input of aluminum chips.

Embodiment 2

As the second embodiment of the present invention, as shown in Figures 7 and 8: the regenerative combustion system 2 includes four regenerative burners 201 and four regenerators 202, two of which are regenerative burners. The nozzle 201 and the heat storage body 202 are respectively arranged in pairs on the left side of the insulation chamber 106. The other two heat storage burners 201 and the heat storage body 202 are respectively arranged in pairs on the side opposite the aluminum ingot feeding port 1061, and heat storage there is The arrangement height of the burner 201 is lower than the height of the regenerative burner 201 on the left side of the insulation chamber 106. The primary screen 1062 and the secondary screen 1063 are respectively arranged at the upper end of the melted aluminum liquid in the insulation chamber 106. The primary screen 1062 and the secondary screen The function of the net 1063 is to screen the aluminum ingots and the gap size of the primary screen 1062 is twice that of the secondary screen 1063, so that the regenerative burner 201 on the left side of the insulation room 106 first sieves the aluminum on the primary screen. The ingots are melted. After the aluminum ingots on the first-level screen 1062 are melted, the regenerative burners opposite the aluminum ingot feeding port 1061 melt the aluminum ingots on the second-level screen 1063. This process is done by classifying the aluminum ingots. Melting greatly improves energy utilization efficiency and reduces energy loss. In this embodiment, the electronic control system 4 controls the opening of a certain air duct so that the air passes through the regenerator I and enters a regenerator burner I to mix with the gas and burn, so as to achieve the purpose of melting the aluminum material. The exhaust gas generated by the combustion passes through another A regenerative burner II flows through the regenerator II and is discharged. This process causes the regenerator II to be heated. The electronic control system 4 controls the switching of the valve through the temperature change of the heated regenerator II to allow air to flow through the heated regenerator II. Combining with another regenerative burner II for gas combustion, through the above cyclic heating and combustion method, the heat of the exhaust gas is not only reabsorbed by the regenerator 202, but also the air is heated through the regenerator 202, making the regenerative burner 201 burn more fully. , effectively reducing gas consumption.

The electric heating device 3 includes a primary induction coil 302 and a secondary induction coil 303, an intermediate frequency power supply 301, an electromagnetic flowmeter and a vortex flowmeter 306. The primary induction coil 302 is further divided into a first induction coil 3021, a second induction coil 3022 and a third induction coil 3023. The main reason for subdividing the primary induction coil 302 is to solve the problem of the aluminum liquid passing through the aluminum liquid delivery channel I102. Different degrees of deposits are formed during the process. Due to the characteristics of the upper port of the molten aluminum transport channel I102 being large and the lower port being small, deposits are more likely to form at the lower outlet, so the primary induction coil 302 is subdivided. According to the channel deposition conditions inside the aluminum liquid conveying channel I102, different coil shapes are designed. The first induction coil 3021 is spiral in shape and is wound around the eddy current circulation device 101 in the aluminum liquid conveying channel I102; the second induction coil 3022 is in the shape of "C" and is arranged in the middle area of the aluminum liquid conveying channel I102; the third induction coil 3023 is in the shape of "(" and is arranged in the aluminum liquid conveying channel I102 near the pump chamber 103. Through the above shape design and position arrangement It can effectively solve different aluminum material deposition conditions inside the aluminum liquid conveying channel I102.

Further, the eddy current circulation device 101 is divided into an eddy current generating channel 1011, a silicon carbide furnace body 1012, a heat-resistant insulation layer 1013, and an aluminum chip feed port 1014. During the feeding process of aluminum chips through the aluminum chip feed port 1014, it is most likely to form a blockage at the outlet of the eddy current circulation device 101. Therefore, the secondary induction coil 303 is arranged outside the heat-resistant insulation layer 1013, and the lower end of the secondary induction coil 303 is spaced The position distribution is flush with the lower end of the aluminum liquid outlet inside the eddy current circulation device 101, and the upper end of the secondary induction coil 303 is slightly higher than the upper end of the aluminum liquid outlet. Through this arrangement, easy-to-block locations can be cleared in a targeted manner.

In addition, in order to determine the deposition and clogging situation, an electromagnetic flowmeter I304 is arranged at the connection between the outlet of the pump chamber 103 and the aluminum liquid conveying channel I102, an electromagnetic flowmeter II305 is arranged at the connection between the aluminum liquid conveying channel I102 and the eddy current generating channel 1011, and the eddy current circulation device 101 A vortex flowmeter 306 is arranged at the outlet. By monitoring the electromagnetic flowmeter I and electromagnetic flowmeter II arranged in the aluminum liquid conveying channel I102, when the difference percentage of the flow rate difference is greater than 5% and less than 10%, it is determined to be a first-level deposition. When the difference percentage of the flow rate difference When the percentage is greater than 10% and less than 20%, it is determined to be secondary deposition. When the difference percentage of the flow rate difference is greater than 20%, it is determined to be third-level deposition; when the flow rate difference between the vortex flowmeters arranged in the vortex circulation device is greater than 20% , it is determined that the outlet is blocked. This is used as the basis for the electronic control system to control the intermediate frequency power supply to achieve instantaneous heating of the primary induction coil and the secondary induction coil, thereby reducing unnecessary energy loss.

A dual-heat smelting method based on eddy current circulation feeding provided by the present invention, as shown in Figure 6, includes the following steps:

Step 1: Aluminum materials are classified and melted. First, the aluminum materials are preprocessed according to the volume of the aluminum materials, and the aluminum materials are divided into large aluminum ingots and finely divided aluminum scraps; the melting furnace equipment is initially operated, and the large aluminum ingots are processed Re-screen and classify, take the lead in putting the large aluminum ingots into the aluminum ingot feeding port 1061. The large aluminum ingots that have not passed the primary screen 1062 are placed on the screen, and the smaller aluminum ingots have passed the primary screen 1062 but have not passed the secondary screen. The mesh 1063 is placed on the secondary screen 1063. The regenerative burner 201 and the regenerator 202 on the left side of the insulation room 106 take the lead in melting the aluminum ingots on the primary screen 1062. After the aluminum ingots on the primary screen 1062 are After the ingot is melted, the aluminum ingot on the secondary screen 1063 is melted. The alternating combustion during the melting process is controlled by the electronic control system 4 to open a certain air duct so that the air passes through the regenerator I and enters a regenerative burner I to mix with the gas for combustion. The exhaust gas generated by the combustion passes through another regenerative burner II. It flows through the regenerator II and is discharged. This process causes the regenerator II to be heated. The electronic control system 4 controls the valve switching through the temperature change of the heated regenerator II so that the air flows through the heated regenerator II and another regenerator. Mouth Ⅱ is used for gas combustion. Through the above method, the graded melting and cyclic combustion of aluminum ingots are achieved, reducing energy loss.

Step 2: The aluminum liquid vortex circulates and the relevant data of the flow meter is recorded. When the aluminum ingot in the insulation chamber 106 is melted into liquid aluminum, the liquid aluminum enters the pump chamber 103 through the liquid aluminum transport channel III 105, and the mechanical pump inside the pump chamber 103 pumps the aluminum into the pump chamber 103. The liquid is raised to a certain height, and then the aluminum liquid enters the vortex generation channel 1011 from the pump chamber 103 through the aluminum liquid transport channel I102. Record the aluminum liquid flow rate of the electromagnetic flowmeter I304 and the electromagnetic flowmeter II305 when no aluminum material deposition occurs at this time, and Obtain the flow velocity difference ΔV1; after the aluminum liquid passes through the eddy current generation channel 1011, a vortex is formed, and the aluminum chips are put in through the aluminum chip feed port 1014. The scouring effect of the aluminum chips affected by the eddy current passes through the silicon carbide furnace body 1012 outlet, and the record does not appear at this time. The flow rate V1 of the vortex flowmeter 306 during adhesion and deposition; further, the solid-liquid mixture of aluminum enters the insulation chamber 106 and melts due to the eddy current erosion.

Step 3: Aluminum material is deposited and cleaned in the aluminum liquid conveying channel. With the input of aluminum material, the aluminum liquid will inevitably appear in the insulating chamber 106 during the eddy current circulation process, carrying aluminum chips into the pump chamber 103, and the aluminum liquid will follow the The temperature decrease further causes deposition in the aluminum liquid conveying channel I102. When deposition occurs, the electromagnetic flowmeter I and the electromagnetic flowmeter II arranged at both ends of the aluminum liquid conveying channel I102 are bound to change, and the flow rate difference between the two flowmeters is recorded at this time. ΔV2, when When the first-level deposition occurs in the aluminum liquid conveying channel I102, the electronic control system 4 controls the intermediate frequency power supply 301 to deposit aluminum material in the first induction coil 3021 heating channel. If the aluminum material melts and the flow rate difference in the aluminum liquid conveying channel I102 is restored, the electronic control system System 4 controls the intermediate frequency power supply 301 to disconnect, and the first induction coil 3021 stops heating. If the flow rate difference in the molten aluminum liquid conveying channel I 102 of the aluminum material is not restored, the electronic control system 4 controls the intermediate frequency power supply 301 to activate the second induction coil and the third induction coil. The deposited aluminum material is instantaneously heated in sequence until the flow velocity difference in the aluminum liquid conveying channel I102 is restored, and the electronic control system 4 controls the intermediate frequency power supply 301 to be disconnected; when/> When, that is, secondary deposition occurs in the aluminum liquid conveying channel I102, the electronic control system 4 controls the intermediate frequency power supply 301 to cause the first and second induction coils to heat the channel at the same time to deposit aluminum material. If the aluminum material melts, the flow rate difference in the aluminum liquid conveying channel I102 is restored, Then the electronic control system 4 controls the intermediate frequency power supply 301 to disconnect, and the first and second induction coils stop heating. If the flow rate difference in the molten aluminum liquid conveying channel I 102 of the aluminum material is not restored, the electronic control system 4 controls the intermediate frequency power supply 301 to cause the third induction coil to 3023 instantaneously heats the deposited aluminum material until the flow rate difference in the aluminum liquid conveying channel I102 is restored, and the electronic control system 4 controls the intermediate frequency power supply 301 to be disconnected; when/> When, that is, three-level deposition occurs in the aluminum liquid conveying channel I102, the electronic control system 4 controls the intermediate frequency power supply 301 to cause the first, second, and third induction coils to simultaneously heat the aluminum material deposited in the channel until the aluminum material melts. The flow rate of the aluminum liquid conveying channel I102 When the difference is restored, the electronic control system 4 controls the intermediate frequency power supply 301 to be disconnected. This step effectively reduces the power loss and increases the safety of the equipment by determining the lower deposition state and instantaneously controlling the intermediate frequency power supply 301 by the electronic control system 4 .

Step 4: The eddy current circulation device is clogged and unblocked. When the aluminum chips are put into the silicon carbide furnace body 1012 from the aluminum chip feed port 1014, they will be washed by the eddy current of the high-temperature aluminum liquid and oxidized, and will adhere to the aluminum liquid outlet of the silicon carbide furnace body 1012. , causing the channel mouth to be blocked, record the flow velocity V2 of the vortex flowmeter 306 at this time, and also when At this time, the electronic control system 4 controls the intermediate frequency power supply 301 to cause the secondary induction coil 303 to perform instantaneous induction heating, causing the adhered aluminum material in the eddy current circulation device 101 to melt. When the flow rate of the vortex flowmeter 306 returns to V1, the electronic control system 4 controls the intermediate frequency power supply. 301 stops heating the secondary induction coil 303. In this step, by setting the flow rate difference, when the clogging state has a greater impact on the eddy current circulation device 101, the electronic control system 4 controls the intermediate frequency power supply 301 to cause the secondary induction coil 303 to perform instantaneous induction heating, ensuring the reliability of aluminum chip feeding. Persistent.

Step 5: Continue to put the aluminum material into melting. If the situation in steps 3 and 4 does not occur, continue to put in the aluminum material according to steps 1 and 2 to achieve the melting of the aluminum material during the eddy current cycle; further, if the situation in step 3 and step 4 occurs, In either case of step 3 or step 4, instantaneous induction heating is performed according to step 3 or step 4, and steps 3 and 4 are independent of each other and do not affect each other.

The above disclosures are only specific embodiments of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, any modifications made without departing from the principles of the present invention should be regarded as belonging to the present invention. Protect.

Claims (7)

1. The utility model provides a smelting furnace of vortex circulation feeding which characterized in that: the electric heating type aluminum scrap heat preservation furnace comprises a furnace body, a regenerative combustion system, an electric heating type heating device and an electric control system, wherein the furnace body comprises an eddy current circulation device, an aluminum liquid conveying channel I, an aluminum liquid conveying channel II, an aluminum liquid conveying channel III, an aluminum scrap feeding port, an aluminum ingot feeding port, a pump chamber and a heat preservation chamber;

The primary induction coil comprises a first induction coil, a second induction coil and a third induction coil, wherein the first induction coil is in a spiral shape, the second induction coil is in a C shape, the third induction coil is in a shape (the radial parameter of the primary induction coil changes in the same direction along with the radius change of the aluminum liquid conveying channel I;

the first induction coil is wound and arranged at the position, close to the eddy current circulation device, of the aluminum liquid conveying channel I, the second induction coil is arranged in the middle area of the aluminum liquid conveying channel I, and the third induction coil is arranged at the position, close to the pump chamber, of the aluminum liquid conveying channel I; an electromagnetic flowmeter I is arranged at the joint of the outlet of the pump chamber and the aluminum liquid conveying channel I, an electromagnetic flowmeter II is arranged at the joint of the aluminum liquid conveying channel I and the vortex generating channel, and a vortex flowmeter is arranged at the outlet of the vortex circulating device for judging the deposition blocking condition;

in an initial running state of the equipment, a smelting furnace smelts aluminum ingots according to the size of aluminum materials, large aluminum ingots are thrown through an aluminum ingot feeding port, small aluminum scraps are thrown from an aluminum scraps feeding port, an electric control system controls a heat accumulating type combustion system to circularly heat the aluminum ingots, molten aluminum liquid flows through an aluminum liquid conveying channel III from a heat insulating chamber to enter a pump chamber, a mechanical pump in the pump chamber lifts the aluminum liquid and then enters a vortex generating channel through the aluminum liquid conveying channel I, an electromagnetic flowmeter is used for recording the inlet and outlet flow velocity difference of the aluminum liquid when the aluminum liquid conveying channel I does not deposit, the aluminum liquid enters the vortex generating channel through the aluminum liquid conveying channel I, the aluminum scraps are continuously thrown through the aluminum scraps feeding port, the aluminum scraps are washed by the vortex effect to enter an aluminum liquid conveying channel II through an outlet of a vortex circulating device and then enter the heat insulating chamber, and the aluminum scraps entering the heat insulating chamber are smelted through the heat accumulating type combustion system;

If aluminum deposition occurs in the aluminum liquid conveying channel I, when primary deposition occurs, the electric control system controls the intermediate frequency power supply to enable aluminum materials to be deposited in the first induction coil heating channel, if the flow speed difference of the aluminum material melting aluminum liquid conveying channel I is recovered, the electric control system controls the intermediate frequency power supply to be disconnected, the first induction coil stops heating, if the flow speed difference of the aluminum material melting aluminum liquid conveying channel I is not recovered, the electric control system controls the intermediate frequency power supply to enable the second induction coil and the third induction coil to sequentially and instantaneously heat the deposited aluminum materials until the flow speed difference of the aluminum liquid conveying channel I is recovered, and the electric control system controls the intermediate frequency power supply to be disconnected; when secondary deposition occurs, the electric control system controls the intermediate frequency power supply to enable the first induction coil and the second induction coil to heat the deposited aluminum material in the channel at the same time, if the flow speed difference of the aluminum material molten aluminum liquid conveying channel I is recovered, the electric control system controls the intermediate frequency power supply to be disconnected, the first induction coil and the second induction coil stop heating, if the flow speed difference of the aluminum material molten aluminum liquid conveying channel I is not recovered, the electric control system controls the intermediate frequency power supply to enable the third induction coil to instantaneously heat the deposited aluminum material until the flow speed difference of the aluminum liquid conveying channel I is recovered, and the electric control system controls the intermediate frequency power supply to be disconnected; when three-stage deposition occurs, the electric control system controls the intermediate frequency power supply to enable the first induction coil, the second induction coil and the third induction coil to heat the deposited aluminum material in the channel until the flow speed difference of the aluminum liquid conveying channel I is recovered, and the electric control system controls the intermediate frequency power supply to be disconnected.

2. The vortex circulating charged smelting furnace of claim 1 wherein: the heat accumulating type combustion system consists of two heat accumulating burners and a heat accumulator, the heat accumulating burners and the heat accumulator are respectively arranged on the left side of the heat insulating chamber in pairs, the electric control system realizes the circulation heating of the heat accumulator and the alternate combustion of the heat accumulating burners by controlling the opening and closing of a pipeline valve, and the electric control system controls the switching of the valve by the temperature change of the heated heat accumulator so that air flows through the heated heat accumulator to be combusted with the fuel gas of the other heat accumulating burner in a matched manner, thereby forming circulation heating combustion.

3. The vortex circulating charged smelting furnace of claim 1 wherein: the vortex circulation device is connected with the pump chamber through an aluminum liquid conveying channel I, a mechanical pump is arranged in the pump chamber and used for lifting aluminum liquid, an outlet of the pump chamber is higher than an inlet of the vortex circulation device, so that the aluminum liquid can enter the vortex circulation device from the pump chamber through the aluminum liquid conveying channel I, and the radius of the aluminum liquid conveying channel I is gradually increased from bottom to top.

4. The vortex circulating charged smelting furnace of claim 1 wherein: the vortex circulating device comprises a vortex generating channel, a silicon carbide furnace body and a heat-resistant heat-insulating layer, the secondary induction coil is arranged outside the heat-resistant heat-insulating layer, the spatial position distribution of the lower end of the secondary induction coil is level with the lower end of an aluminum liquid outlet inside the vortex circulating device, and the upper end of the secondary induction coil is slightly higher than the upper end of the aluminum liquid outlet.

5. The vortex circulating charged smelting furnace of claim 1 wherein: the heat accumulating type combustion system comprises 4 heat accumulating burners and 4 heat accumulating bodies, wherein the two heat accumulating burners and the heat accumulating bodies are arranged on the left side of a heat insulating chamber in pairs respectively, the other two heat accumulating burners and the heat accumulating bodies are arranged on the opposite side of an aluminum ingot feeding port in pairs respectively, a primary screen and a secondary screen are arranged at the upper end of molten aluminum in the heat insulating chamber respectively, and the primary screen and the secondary screen are used for sieving aluminum ingots and the gap size of the primary screen is twice that of the secondary screen.

6. A smelting process using the vortex circulating charged smelting furnace of claim 1, characterized by: the method comprises the following steps:

according to the method, in an initial operation state of equipment, a smelting furnace is used for smelting large aluminum ingots through an aluminum ingot feeding port according to the size of aluminum materials, small aluminum scraps are fed through an aluminum scraps feeding port, an electric control system is used for controlling a regenerative combustion system to circularly heat the aluminum ingots, aluminum liquid to be melted flows through an aluminum liquid conveying channel III from a heat preservation chamber to enter a pump chamber, a mechanical pump in the pump chamber is used for lifting the aluminum liquid and then enters a vortex generating channel through the aluminum liquid conveying channel I, an electromagnetic flowmeter is used for recording the inlet and outlet flow velocity difference when the aluminum liquid conveying channel I does not deposit the aluminum materials, the aluminum liquid enters the vortex generating channel through the aluminum liquid conveying channel I, the aluminum scraps are continuously fed through the aluminum scraps feeding port, the aluminum scraps are washed by the vortex effect and enter an aluminum liquid conveying channel II through a vortex circulating device outlet and then enter the heat preservation chamber, and the aluminum scraps entering the heat preservation chamber are smelted through the regenerative combustion system;

If the aluminum material deposition occurs in the aluminum liquid conveying channel I, when the primary deposition occurs, the electric control system controls the intermediate frequency power supply to enable the aluminum material to be deposited in the first induction coil heating channel, if the flow speed difference of the aluminum material molten aluminum liquid conveying channel I is recovered, the electric control system controls the intermediate frequency power supply to be disconnected, the first induction coil stops heating, if the flow speed difference of the aluminum material molten aluminum liquid conveying channel I is not recovered, the electric control system controls the intermediate frequency power supply to enable the second induction coil and the third induction coil to sequentially and instantaneously heat the deposited aluminum material until the flow speed difference of the aluminum liquid conveying channel I is recovered, and the electric control system controls the intermediate frequency power supply to be disconnected; when secondary deposition occurs, the electric control system controls the intermediate frequency power supply to enable the first induction coil and the second induction coil to heat the deposited aluminum material in the channel at the same time, if the flow speed difference of the aluminum material molten aluminum liquid conveying channel I is recovered, the electric control system controls the intermediate frequency power supply to be disconnected, the first induction coil and the second induction coil stop heating, if the flow speed difference of the aluminum material molten aluminum liquid conveying channel I is not recovered, the electric control system controls the intermediate frequency power supply to enable the third induction coil to instantaneously heat the deposited aluminum material until the flow speed difference of the aluminum liquid conveying channel I is recovered, and the electric control system controls the intermediate frequency power supply to be disconnected; when three-stage deposition occurs, the electric control system controls the intermediate frequency power supply to enable the first induction coil, the second induction coil and the third induction coil to heat aluminum materials to be deposited in the channels until the flow speed difference of the aluminum liquid conveying channel I is recovered, and the electric control system controls the intermediate frequency power supply to be disconnected; if any deposition condition occurs in the aluminum liquid conveying channel I, repeating the second step;

Step three, as aluminum scraps enter the vortex circulation device, if aluminum scraps are accumulated to block an outlet, the flow speed at the outlet is changed, if the flow speed when the outlet is blocked is greater than 20% different from the flow speed when the outlet is not blocked, the electric control system controls the intermediate frequency power supply to enable the secondary induction coil to heat the aluminum scraps, the aluminum scraps at the position to be blocked are melted, the flow speed is recovered, the electric control system controls the intermediate frequency power supply to be disconnected, and the secondary induction coil stops heating; if the aluminum material is blocked at the outlet of the vortex circulation device, repeating the step, wherein the step two and the step three are independent and are not affected.

7. The smelting process according to claim 6, wherein: in the second step, the speed measurement of the flowmeter is used for judging the deposition blocking condition, the electromagnetic flowmeter I and the electromagnetic flowmeter II which are arranged in the aluminum liquid conveying channel I are judged to be first-stage deposition when the difference percentage of the flow velocity difference is more than 5% and less than 10%, are judged to be second-stage deposition when the difference percentage of the flow velocity difference is more than 10% and less than 20%, and are judged to be third-stage deposition when the difference percentage of the flow velocity difference is more than 20%; and when the flow velocity difference of the vortex flowmeter arranged by the vortex circulation device is more than 20%, judging that the outlet is blocked.