CN220489694U - Melt integrative stove of protecting - Google Patents
Melt integrative stove of protecting Download PDFInfo
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- CN220489694U CN220489694U CN202322028910.8U CN202322028910U CN220489694U CN 220489694 U CN220489694 U CN 220489694U CN 202322028910 U CN202322028910 U CN 202322028910U CN 220489694 U CN220489694 U CN 220489694U
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Abstract
The utility model relates to the technical field of casting, in particular to a melting and protecting integrated furnace, which comprises a premelting section furnace body and a melting and protecting section furnace body which are communicated with a furnace chamber, and also comprises a temperature sensor and a controller; the premelting section furnace body is a tower, the side wall of the upper section of the tower is provided with a burner, the side wall of the lower section of the tower is provided with a feed inlet, and the burner is used for heating and melting an aluminum ingot input by the feed inlet; a porous medium burner is arranged on the top cover of the melting and protecting section furnace body; the temperature sensor is arranged on the melting protection section furnace body and is used for monitoring the temperature of the aluminum liquid; the controller is in communication connection with the temperature sensor and is used for increasing the power of the porous medium burner after the temperature of the aluminum liquid is monitored to be reduced by a preset amplitude. The aluminum slag reducing device can keep the temperature of the aluminum liquid stable and reduce aluminum slag.
Description
Technical Field
The utility model relates to the technical field of casting, in particular to a melting and protecting integrated furnace.
Background
In aluminum alloy casting production, the basic configuration is that an independent smelting furnace and an independent heat preservation furnace are added, the smelting furnace and the heat preservation furnace are connected by adopting a middle launder, and the smelting furnace and the heat preservation furnace are heated by adopting a burner system. In the casting process of high-end aluminum alloy, particularly 2-series and 7-series alloy, the alloy is sensitive to the temperature of casting aluminum liquid, and the change of the temperature of the aluminum liquid can have great influence on the quality of products. The furnace temperature of the burner heating is unstable, aluminum ingot aluminum liquid is in direct contact with flame, more aluminum slag is generated by oxidation, and the configuration scheme of the smelting furnace and the heat preservation furnace is not only required to be provided with a plurality of furnace bodies, but also the aluminum liquid is easy to cause the temperature fluctuation of the aluminum liquid in the transfer process, so that the aluminum slag is generated.
Disclosure of Invention
The utility model aims to provide a melting and protecting integrated furnace which can realize melting of aluminum ingots and heat preservation of aluminum liquid in one furnace, reduce temperature fluctuation of the aluminum liquid and reduce aluminum slag generation.
In order to achieve the above object, the present utility model adopts the following technical scheme.
A melt-protecting integrated furnace comprising: the furnace chamber is communicated with the premelting section furnace body and the melting protection section furnace body, and also comprises a temperature sensor and a controller;
the pre-melting section furnace body is a tower, the side wall of the upper section of the tower is provided with a burner, the side wall of the lower section of the tower is provided with a feed inlet, and the burner is used for heating and melting an aluminum ingot input by the feed inlet;
a porous medium burner is arranged on the top cover of the melting and protecting section furnace body; the temperature sensor is arranged on the melting and protecting section furnace body and is used for monitoring the temperature of the aluminum liquid;
the controller is in communication connection with the temperature sensor and is used for increasing the power of the porous medium burner after the temperature of the molten aluminum is monitored to be reduced by a preset amplitude.
In the technical scheme, the porous medium burner is adopted to heat the aluminum liquid. According to the known combustion technology, the porous medium burner has better combustion efficiency, and the gas and the auxiliary gas are introduced into the porous medium burner, so that the gas and the auxiliary gas are discharged into high-temperature air flow after flameless combustion in the porous medium, and the porous medium is heated by infrared radiation in the form of stable illuminant in the combustion process. The porous medium burner has the advantage of ultra low emissions, wherein the nitrogen oxide emissions are below 20mg/m 3 And no carbon monoxide is discharged. The combustion efficiency is high, so that the combustion of the fuel gas and the combustion-supporting gas is sufficient, and the energy consumption can be reduced by 20-30% in the aspect of energy conservation.
Further, the melting and protecting integrated furnace further comprises a liquid level sensor;
the liquid level sensor is arranged on the premelting section furnace body and is used for monitoring the liquid level height of the aluminum liquid;
the controller is also used for closing the burner after the liquid level is detected to meet the requirements.
After the aluminum ingot is melted by the burner to obtain aluminum liquid with a certain liquid level, the aluminum ingot which is put into the furnace again can be soaked in the aluminum liquid, and after the burner is turned off, the aluminum liquid is heated by the porous medium burner, so that the energy consumption of the melting and protecting integrated furnace can be reduced by utilizing the advantages of high heat efficiency and balanced and stable temperature of the porous medium burner.
Specifically, the porous medium burner comprises a gas inlet, an air inlet, a premixing cavity, a combustion surface and a flue;
the combustion surface is arranged at one end of the premixing cavity and faces the bottom of the smelting protection section furnace body; the fuel gas inlet and the air inlet are formed at the other end of the premixing cavity opposite to the combustion surface;
the flue covers the periphery of the combustion surface, and flue gas generated by combustion of the porous medium burner is discharged through the flue.
Further, the flue is a U-shaped pipeline, a part of the flue is immersed in the aluminum liquid, and an outlet of the flue is arranged on a top cover of the melting and protecting section furnace body.
The flue is partially immersed in the aluminum liquid, the aluminum liquid is heated through the temperature of the flue gas, flame on the combustion surface is not in direct contact with the aluminum liquid, so that aluminum ablation is avoided, aluminum slag can be reduced, on the other hand, heat transfer can be better achieved through direct contact between the outer wall of the flue and the aluminum liquid, and meanwhile, contact heat conduction and radiation heat conduction of the aluminum liquid are adopted, so that the heat efficiency is higher.
The controller is also used for controlling the opening of the porous medium burner and the burner nozzle when the furnace is empty so as to preheat the furnace chamber.
Wherein, one side wall of the melting and protecting section furnace body is communicated with the premelting section furnace body on the side wall of the lower section of the tower relative to the feed inlet;
the bottom surface of the premelting section furnace body is obliquely arranged, and the horizontal height of the bottom surface, which is close to one end of the melting protection section furnace body, is lower than the horizontal height of the bottom surface, which is close to the other end of the melting protection section furnace body.
Wherein, the top of the premelting section furnace body is provided with a smoke outlet.
Further, the melting and protecting integrated furnace also comprises a discharging section furnace body;
the discharging section furnace body is communicated with the smelting protection section furnace body, and the discharging end furnace body is provided with a discharging hole. The opening and closing of the discharge hole is linked with the controller, and the controller is used for controlling the power of the porous medium burner to be increased when the discharge hole is opened.
Further, a ceramic radiation heating plate is horizontally arranged between the burner and the feeding hole, and divides the premelting section furnace body into an upper tower section and a lower tower section.
Compared with the prior art, the utility model has the beneficial effects that: the aluminum ingot is melted by the burner to obtain a certain amount of aluminum liquid, the aluminum liquid is heated by the porous medium burner, when the new aluminum ingot is judged to be added by the temperature change of the aluminum liquid, the power of the porous medium burner is increased, the continuously-heated aluminum liquid is used for melting the newly added aluminum ingot, so that the temperature of the aluminum liquid in the furnace chamber is more uniform and stable, the aluminum liquid does not need to be transferred, the temperature fluctuation of the aluminum liquid is avoided, and the generation of aluminum slag can be reduced.
Drawings
The utility model is further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic diagram of the structure of the present utility model.
Reference numerals: 1-a liquid level sensor; 2-melting and protecting the furnace body; 3-a premelting section furnace body; 4-porous medium burner; 5-burner; 6-a temperature sensor; 7-a feed inlet; 8-a discharging section furnace body; 9-a smoke outlet; 31-ceramic radiant heating plate; 41-gas inlet; 42-air inlet; 43-combustion face; 44-flue; 81-a discharge hole.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
As shown in fig. 1, in one embodiment, the present utility model provides a melt-protecting integrated furnace comprising: the furnace chamber is communicated with the premelting section furnace body 3 and the melting protection section furnace body 2, and further comprises a temperature sensor 6 and a controller (not shown in the figure).
The premelting section furnace body 3 is a tower type, the side wall of the upper section of the tower is provided with a burner 5, and the side wall of the lower section of the tower is provided with a feed inlet 7.
A porous medium burner 4 is arranged on the top cover of the melting and protecting section furnace body 2; the temperature sensor 6 is arranged in the furnace chamber of the melting and protecting section furnace body 2 and is used for monitoring the temperature of the molten aluminum.
One side wall of the melting protection section furnace body 2 is communicated with the side wall of the lower section of the tower relative to the feed inlet 7 of the premelting section furnace body 3; the bottom surface of the premelting section furnace body 3 is obliquely arranged, and the horizontal height of one end of the bottom surface, which is close to the melting and protecting section furnace body 2, is lower than the horizontal height of the other end.
The controller is used for controlling the opening of the porous medium burner 4 and the burner 5 when the furnace is empty so as to preheat the furnace chamber. After the aluminum ingot is put into the furnace, the burner 5 heats and melts the aluminum ingot put into the feed inlet 7 to obtain a certain amount of aluminum liquid. The molten aluminum flows into the melting and protecting section furnace body 2 along the inclined bottom surface of the premelting section furnace body 3. Meanwhile, the controller is in communication connection with the temperature sensor 6 and is used for increasing the power of the porous medium burner 4 when the temperature of the aluminum liquid is monitored to be reduced by a preset amplitude after a new aluminum ingot is put into the furnace.
The preset amplitude can be set according to the accuracy requirement of temperature control, and is generally 10-20 ℃.
In the technical scheme, a certain amount of aluminum liquid is obtained by melting aluminum ingots through the burner 5, meanwhile, the porous medium burner 4 is used for heating the aluminum liquid, when the fact that new aluminum ingots are added is judged through the temperature change of the aluminum liquid, the power of the porous medium burner 4 is increased, the continuously-heated aluminum liquid is used for melting the newly added aluminum ingot, the temperature of the aluminum liquid in the furnace chamber is more uniform and stable, the aluminum liquid does not need to be transferred, the temperature fluctuation of the aluminum liquid is avoided, and the generation of aluminum slag can be reduced.
Specifically, in the present embodiment, the porous medium burner 4 includes a gas inlet 41, an air inlet 42, a premix chamber, and a combustion surface 43.
The combustion surface 43 is arranged at one end of the premixing cavity and faces the bottom of the melting and protecting section furnace body 2; the gas inlet 41 and the air inlet 42 are provided at the other end of the premix chamber opposite the combustion surface 43. The combustion surface 43 is a silicon carbide porous medium.
The fuel gas enters the premixing cavity from the fuel gas inlet 41, the air enters the premixing cavity from the air inlet 42, and after being fully mixed in the premixing cavity, the fuel gas is introduced into the pores of the combustion surface 43, and is ignited and continuously combusted on the surface of the combustion surface 43.
According to the known combustion technology, the porous medium burner has better combustion efficiency, and the gas and the auxiliary gas are introduced into the porous medium burner, so that the gas and the auxiliary gas are discharged into high-temperature air flow after flameless combustion in the porous medium, and the porous medium is heated by infrared radiation in the form of stable illuminant in the combustion process. The porous medium burner has the advantage of ultra low emissions, wherein the nitrogen oxide emissions are below 20mg/m 3 And no carbon monoxide is discharged. The combustion efficiency is high, so that the combustion of the fuel gas and the combustion-supporting gas is sufficient, and the energy consumption can be reduced by 20-30% in the aspect of energy conservation.
Further, in other embodiments, the integrated melting and protecting furnace further comprises a liquid level sensor 1.
The liquid level sensor 1 is arranged in the premelting section furnace body 3 and is used for monitoring the liquid level of the aluminum liquid; the controller is also used for turning off the burner 5 after the liquid level is detected to be satisfactory.
After the burner 5 melts the aluminum ingot to obtain aluminum liquid with a certain liquid level, the added aluminum ingot can be soaked in the aluminum liquid, and after the burner 5 is turned off, the aluminum liquid is heated only through the porous medium burner 4, so that the energy consumption of the melting and protecting integrated furnace can be reduced by utilizing the advantages of high heat efficiency and balanced and stable temperature of the porous medium burner. In addition, compared with the surface combustion of the porous medium burner, the diffusion combustion of the burner has larger ablation effect on aluminum ingots and aluminum liquid, generates more aluminum slag, shortens the service time of the burner 5, and is also a key point for reducing the aluminum slag.
The top of the premelting section furnace body 3 is provided with a smoke outlet 9, and smoke generated by burning the burner 5 and the porous medium burner 4 is discharged from the smoke outlet 9.
In other embodiments, the porous medium burner 4 further includes a flue 44, the flue 44 is covered on the periphery of the combustion surface 43, and the flue gas generated by the combustion of the porous medium burner 4 is discharged through the flue 44. Specifically, the flue 44 is a U-shaped pipe, a part of the flue 44 is immersed in the aluminum liquid, and an outlet of the flue 44 is arranged on the top cover of the melting and protecting section furnace body 2.
Part of the flue 44 is immersed in the aluminum liquid, and the aluminum liquid is heated by the temperature of the flue gas, so that on one hand, the flame of the combustion surface 43 is not in direct contact with the aluminum liquid, thereby avoiding aluminum ablation and reducing aluminum slag, and on the other hand, the infrared radiation heating efficiency is limited because aluminum has a certain reflection effect on infrared, the outer wall of the flue is in direct contact with the aluminum liquid, and the outer wall of the flue is in contact heat conduction and radiant heat conduction simultaneously, so that heat can be better transferred, and the heat efficiency is higher.
Further, in order to reduce the aluminum ablation of the burner 5, in other embodiments, a ceramic radiant heating plate 31 is horizontally disposed between the burner 5 and the feed port 7, and the ceramic radiant heating plate 31 divides the premelt section furnace body 3 into an upper tower section and a lower tower section. Radiant heating conforming to the absorption wavelength of aluminum can be realized by the ceramic radiant heating plate 31, the thermal efficiency is low compared with direct combustion heating, but the ablation of aluminum is lower, the frequency of shutdown cleaning aluminum slag is reduced, and the overall energy saving and the production efficiency improvement are realized.
Further, the melting and protecting integrated furnace also comprises a discharging section furnace body 8; the discharging section furnace body 8 is communicated with the smelting protection section furnace body 2, and a discharging port 81 is arranged on the discharging end furnace body. The switching of discharge gate 81 can link with the controller, opens the discharge gate 81 and can lead to aluminium liquid temperature decline, and the controller can control the power that increases porous medium combustor 4 when opening the discharge gate 81, prevents aluminium liquid cooling by a wide margin, and likewise, according to the feedback of temperature sensor 6, after aluminium liquid temperature decline certain range, increases the power of porous medium combustor 4, through the aluminium liquid in the heating melting section furnace body 2, makes the aluminium liquid in the discharge section furnace body 8 heat up together, reaches the heat preservation effect.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.
Claims (10)
1. A melting and protecting integrated furnace, comprising: the furnace chamber is communicated with the premelting section furnace body and the melting protection section furnace body, and also comprises a temperature sensor and a controller;
the pre-melting section furnace body is a tower, the side wall of the upper section of the tower is provided with a burner, the side wall of the lower section of the tower is provided with a feed inlet, and the burner is used for heating and melting an aluminum ingot input by the feed inlet;
a porous medium burner is arranged on the top cover of the melting and protecting section furnace body; the temperature sensor is arranged on the melting and protecting section furnace body and is used for monitoring the temperature of the aluminum liquid;
the controller is in communication connection with the temperature sensor and is used for increasing the power of the porous medium burner when the temperature of the molten aluminum is monitored to be reduced by a preset amplitude.
2. The integrated melting and holding furnace according to claim 1, wherein:
the porous medium burner comprises a gas inlet, an air inlet, a premixing cavity, a combustion surface and a flue;
the combustion surface is arranged at one end of the premixing cavity and faces the bottom of the smelting protection section furnace body; the fuel gas inlet and the air inlet are formed at the other end of the premixing cavity opposite to the combustion surface;
the flue covers the periphery of the combustion surface, and flue gas generated by combustion of the porous medium burner is discharged through the flue.
3. The integrated melting and holding furnace according to claim 2, wherein:
the flue is a U-shaped pipeline, a part of the flue is immersed in aluminum liquid, and an outlet of the flue is arranged on a top cover of the melting and protecting section furnace body.
4. The integrated melting and holding furnace according to claim 1, wherein:
the controller is also used for controlling the opening of the porous medium burner and the burner nozzle when the furnace is empty so as to preheat the furnace chamber.
5. The integrated melt-and-protect furnace of claim 4 further comprising: a liquid level sensor;
the liquid level sensor is arranged on the premelting section furnace body and is used for monitoring the liquid level height of the aluminum liquid;
the controller is also used for closing the burner after the liquid level is detected to meet the requirements.
6. The integrated melting and holding furnace according to claim 1, wherein:
a side wall of the melting protection section furnace body is communicated with the side wall of the lower section of the tower relative to the feed inlet;
the bottom surface of the premelting section furnace body is obliquely arranged, and the horizontal height of the bottom surface, which is close to one end of the melting protection section furnace body, is lower than the horizontal height of the bottom surface, which is close to the other end of the melting protection section furnace body.
7. The integrated melting and holding furnace according to claim 1, wherein:
and a smoke outlet is arranged at the top of the premelting section furnace body.
8. The integrated melt-and-protect furnace of claim 1 further comprising: a discharging section furnace body;
the discharging section furnace body is communicated with the melting protection section furnace body, and the discharging section furnace body is provided with a discharging hole.
9. The integrated melting and holding furnace of claim 8, wherein:
the opening and closing of the discharge hole is linked with the controller, and the controller is used for controlling the power of the porous medium burner to be increased when the discharge hole is opened.
10. The integrated melting and holding furnace according to claim 1, wherein:
and a ceramic radiation heating plate is horizontally arranged between the burner and the feeding hole, and divides the premelting section furnace body into an upper tower section and a lower tower section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322028910.8U CN220489694U (en) | 2023-07-28 | 2023-07-28 | Melt integrative stove of protecting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322028910.8U CN220489694U (en) | 2023-07-28 | 2023-07-28 | Melt integrative stove of protecting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220489694U true CN220489694U (en) | 2024-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322028910.8U Active CN220489694U (en) | 2023-07-28 | 2023-07-28 | Melt integrative stove of protecting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220489694U (en) |
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2023
- 2023-07-28 CN CN202322028910.8U patent/CN220489694U/en active Active
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