CN221882161U - Calcium-aluminum alloy casting equipment and process - Google Patents

Abstract

The utility model discloses a calcium aluminum alloy smelting and casting device and process, and relates to the technical field of calcium aluminum alloy smelting and casting, specifically a calcium aluminum alloy smelting and casting device, which is installed on a building component basis and is used for smelting calcium aluminum alloy, comprising a furnace and a movable cover body arranged on the furnace, and also comprising a vacuum component and a driving component; the driving component is used to drive the cover body to open and close on the furnace; the furnace comprises a crucible and a furnace body, the crucible is arranged inside the furnace body and a heat preservation chamber is formed between the two, the crucible is made of high-purity graphite material, the air in the heat preservation chamber is extracted by a vacuum pump, and the air in the crucible flows into the heat preservation chamber through an air flow valve, so that the air in the crucible and the heat preservation chamber is discharged, so that the crucible and the inside of the heat preservation chamber are in a vacuum state, thereby avoiding the use of inert gas (including argon, etc.), and achieving the purpose of avoiding the use of inert gas and reducing the cost of calcium aluminum alloy smelting and casting.

Description

Calcium aluminum alloy melting and casting equipment and process

Technical Field

The utility model relates to the technical field of calcium aluminum alloy melting and casting, in particular to calcium aluminum alloy melting and casting equipment and a process.

Background Art

Calcium aluminum alloy is often used as a deep deoxidizer in steel production. Calcium aluminum alloy is an important alloy for smelting. At present, there are three methods for preparing calcium aluminum alloy: blending method, molten salt electrolysis method, and aluminum reduction calcium oxide method. The aluminum reduction calcium oxide method is to mix calcium oxide and metallic aluminum in a certain proportion and then reduce the calcium oxide to obtain metallic calcium at a certain temperature. The generated metallic calcium reacts with liquid aluminum to form a stable metal compound, namely aluminum calcium alloy. The aluminum reduction calcium oxide method produces aluminum calcium alloy. The process is easy. At the same time, the raw materials aluminum and calcium oxide are abundant in resources, and there are no strict requirements on the state. The production cost is not high. It is one of the main methods for preparing aluminum calcium alloy in the future.

In the published Chinese patent application, the publication number is CN216790835U, and the patent name is: A calcium aluminum alloy smelting device. Although, by introducing inert gas argon into the furnace body, calcium oxide and metallic aluminum are prevented from being oxidized during the reaction process; by arranging a horizontal stirring rod and a U-shaped scraper inside the furnace body, the reaction liquid in the furnace body can be stirred to avoid the residue of the reaction liquid in the furnace body. During the calcium aluminum alloy smelting process, the prior art uses argon to fill the inside of the furnace body to strip off the air and prevent the oxygen in the air from oxidizing the calcium aluminum melt. Due to the high cost of the introduced argon, the manufacturing cost of the calcium aluminum alloy casting process is increased. Therefore, in order to solve the problem of high manufacturing cost caused by introducing argon into the calcium aluminum alloy in the prior art, this application is specially proposed to solve it.

Utility Model Content

1. Technical issues to be solved

In view of the deficiencies in the prior art, the utility model provides a calcium aluminum alloy melting and casting device and process, which solves the problems raised in the above background technology.

(II) Technical solution

To achieve the above objectives, the utility model is implemented through the following technical solutions: a calcium aluminum alloy smelting and casting equipment, which is installed on the basis of building components and is used for smelting calcium aluminum alloy, including a furnace and a movable cover body arranged on the furnace, and also including a vacuum component and a driving component; the driving component is used to drive the cover body to open and close on the furnace; the furnace includes a crucible and a furnace body, the crucible is arranged inside the furnace body and a heat preservation chamber is formed between the two, the crucible is made of high-purity graphite material, the crucible and the bottom wall of the furnace body are connected A discharge port is provided at the fixed connection, a discharge port is installed at the discharge port, an inductor coil is arranged on the outer wall of the crucible, and a high-purity graphite felt is provided on the inner wall of the furnace body and in the insulation chamber; the cover body comprises an inner cover and an outer cover fixedly connected together, an infrared thermometer is provided on the cover body, an air cavity is formed between the inner cover and the outer cover, after the cover body and the furnace are sealed, the air cavity is connected to the insulation chamber, an air flow valve is provided on the inner cover, and the vacuum assembly is connected to the insulation chamber.

Optionally, a power input component is provided in the heat preservation chamber, one end of the power input component is electrically connected to the inductor coil, and the other end of the power input component is electrically connected to a medium frequency power supply.

Optionally, the vacuum component includes a vacuum pump, and a vacuum generating end of the vacuum pump is connected to the heat preservation chamber through an air supply pipe.

Optionally, the driving assembly includes a first hydraulic cylinder, an output shaft end of the first hydraulic cylinder is fixedly connected to a crank, and an end of the crank away from the first hydraulic cylinder is fixedly connected to an outer side wall of the outer cover.

Optionally, the discharge assembly includes a discharge valve, a second hydraulic cylinder, and a bent rod, the discharge valve is made of high-purity graphite material, the middle part of the bent rod is installed on the outer wall of the furnace body through a fixed column, one end of the bent rod is fixedly connected to the discharge valve, and the other end of the bent rod is hinged with a connecting rod, and the end of the connecting rod away from the bent rod is fixedly connected to the output shaft end of the second hydraulic cylinder.

Optionally, a stirring assembly is provided on the cover body, and the stirring assembly consists of a stirring rod and a servo motor. The stirring rod passes through the cover body and is rotatably connected to the cover body. The output shaft end of the servo motor is transmission-connected to the stirring rod.

Optionally, it also includes an electrical working box, in which a control panel is arranged, and the control panel is respectively connected to the servo motor, the first hydraulic cylinder, the second hydraulic cylinder, and the vacuum pump.

A calcium aluminum alloy melting and casting process, applicable to a calcium aluminum alloy melting and casting device, the process comprises the following steps:

Step 1: Weigh 63 parts of metal calcium blocks with a calcium content of more than 99% and a particle size of less than 10mm; weigh 25 parts of national standard aluminum ingots with an aluminum content of more than 99.5%; weigh 12 parts of metal aluminum blocks with an aluminum content of more than 99.5% and a particle size of less than 30mm;

Step 2: Confirm that the calcium aluminum alloy casting equipment is operating normally, and put the national standard aluminum ingot into the bottom of the crucible; preheat the other two materials, the metal calcium block and the metal aluminum block to a certain temperature and place them in the crucible, control the medium frequency power supply to start through the electrical working box, and the inductor coil heats up after the medium frequency power supply is powered;

Step 3: The medium frequency power supply is adjusted to 150KW and the temperature is raised to about 700℃. The national standard aluminum ingot in the crucible melts into a liquid state in about 7 minutes.

Step 4: slowly add the metal calcium block and the metal aluminum block into the liquid aluminum water, turn on the servo motor, and drive the stirring rod to rotate and stir the added metal calcium block and metal aluminum block, melt them into the aluminum water and fully contact the aluminum water temperature, so that the added metal calcium iron and metal aluminum blocks are quickly heated and melted;

Step 5: Control the electrical working box, adjust and increase the power of the medium frequency power supply, so that the crucible is heated to about 840°C. The servo motor drives the stirring rod to rotate and stir continuously, so that the temperature in the crucible is evenly heated to act on various raw materials, accelerate the degree of liquid change, greatly improve the composition uniformity and quality stability of the calcium aluminum alloy, and fully and evenly mix and melt to form a calcium aluminum alloy melt;

Step six: start the second hydraulic cylinder through the control panel, the second hydraulic cylinder drives the drain valve to open through the crankshaft, the calcium aluminum alloy melt flows out, and the calcium aluminum alloy melt flows into the calcium aluminum alloy ingot casting device through the guide groove, and the calcium aluminum alloy casting is completed using the calcium aluminum alloy ingot casting device.

(III) Beneficial effects

The utility model provides a calcium aluminum alloy melting and casting device and process, which has the following beneficial effects:

The calcium-aluminum alloy melting and casting equipment, through the setting of the vacuum component, has the effect of putting the crucible and the insulation chamber in a vacuum state. The air in the insulation chamber is extracted by using a vacuum pump, and the air in the crucible flows into the insulation chamber through the air flow valve, so that the air in the crucible and the insulation chamber is discharged, so that the inside of the crucible and the insulation chamber is in a vacuum state, thereby avoiding the use of inert gas (including argon, etc.), and achieving the purpose of avoiding the use of inert gas and reducing the cost of calcium-aluminum alloy melting and casting.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

FIG1 is a schematic cross-sectional view of a calcium aluminum alloy melting and casting device according to the present invention;

FIG2 is a schematic diagram of the front structural view of a furnace body of a calcium aluminum alloy melting and casting equipment according to the present invention.

In the figure: 1. crucible; 2. furnace body; 3. inner cover; 4. outer cover; 5. support seat; 6. vacuum pump; 7. gas pipe; 8. medium frequency power supply; 9. power supply assembly; 10. inductor; 11. foundation; 12. air flow valve; 13. crank; 14. infrared thermometer; 15. first support column; 16. second support column; 17. insulation chamber; 18. drain valve; 19. first hydraulic cylinder; 20. second hydraulic cylinder; 21. bent rod; 22. connecting rod; 23. fixed column; 24. discharge port; 25. stirring rod; 26. servo motor.

DETAILED DESCRIPTION

The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

Please refer to Figures 1 and 2. The utility model provides a technical solution: a calcium aluminum alloy melting and casting device, which is installed on a building component foundation 11 and is used to melt calcium aluminum alloy, including a furnace and a movable cover body arranged on the furnace, and the furnace is installed on a support seat 5. A calcium aluminum alloy melting and casting device also includes a vacuum component and a drive component. The drive component is used to drive the cover body to open and close on the furnace. The furnace includes a crucible 1 and a furnace body 2. The crucible 1 is arranged inside the furnace body 2 and a heat preservation chamber 17 is formed between the two. The crucible 1 is made of high-purity graphite material. A discharge port 24 is provided at the fixed connection between the crucible 1 and the inner bottom wall of the furnace body 2. A discharge flow component is installed at the discharge port 24. An inductor 10 is arranged on the outer wall of the crucible 1, and a high-purity graphite felt is arranged on the inner wall of the furnace body 2 and located in the heat preservation chamber 17. The vacuum component includes a vacuum pump 6, and the vacuum generating end of the vacuum pump 6 is connected to the heat preservation chamber 17 through a gas pipe 7.

Among them, the vacuum component is used to extract the air inside the furnace to make the inside of the furnace a vacuum state. The leakage component is used to block the discharge port 24 and open it when the calcium aluminum alloy melt is discharged. The inductor 10 is used to generate high temperature after power is turned on and heat the crucible 1. After the crucible 1 is heated and heated, the calcium aluminum alloy block located inside it is melted. High-purity graphite has the characteristics of low resistivity, high temperature resistance, corrosion resistance, oxidation resistance, good thermal shock resistance, electrical conductivity, and low thermal expansion coefficient. The upper inner wall of the furnace body 2 is fixedly connected to the crucible 1 through a plurality of second support columns 16.

The cover body includes an inner cover 3 and an outer cover 4 fixedly connected together, an infrared thermometer 14 is arranged on the cover body, an air cavity is formed between the inner cover 3 and the outer cover 4, after the cover body and the furnace are sealed, the air cavity is connected to the heat preservation cavity 17, an air flow valve 12 is arranged on the inner cover 3, and the vacuum component is connected to the heat preservation cavity 17. The inner cover 3 and the outer cover 4 are fixedly connected by a plurality of first support columns 15.

Among them, the infrared thermometer 14 is used to detect the temperature of the calcium aluminum alloy in the crucible 1, so as to timely understand the melting condition of the calcium aluminum alloy. After the cover body and the furnace are sealed, the air cavity and the insulation cavity 17 form a cavity, and the gas inside the crucible 1 can flow into the cavity through the air flow valve 12. Under the action of the vacuum pump 6, the vacuum pump 6 extracts the air inside the cavity through the air pipe 7, and at the same time extracts the air in the crucible 1, so that the air in the crucible 1 is discharged and in a vacuum state, thereby preventing the oxygen in the air from producing an oxidation reaction on the calcium aluminum alloy melt.

Specifically, a power input component 9 is disposed in the heat preservation chamber 17 , one end of the power input component 9 is electrically connected to the inductor 10 , and the other end of the power input component 9 is electrically connected to the medium frequency power supply 8 .

The power supply assembly 9 is composed of multiple groups of transmission lines. The medium frequency power supply 8 uses an IGBT medium frequency power supply with a power of 160KW. The medium frequency power supply 8 is electrically connected to the inductor 10 through each group of transmission lines. The medium frequency power supply 8 is used to generate heat after the inductor 10 is energized. After the inductor 10 generates heat, the crucible 1 is in a high temperature state and can melt the calcium aluminum alloy block (ingot) inside the crucible 1.

Specifically, the driving assembly includes a first hydraulic cylinder 19 , an output shaft end of the first hydraulic cylinder 19 is fixedly connected to a crank 13 , and one end of the crank 13 away from the first hydraulic cylinder 19 is fixedly connected to an outer side wall of the outer cover 4 .

The driving assembly is used to drive the cover to open or close on the furnace (i.e., open or close the cover). When opening the cover, the output shaft of the first hydraulic cylinder 19 extends and drives the crank 13 to rise, and the crank 13 drives the cover to move upward, thereby opening the cover. When closing the cover, the output shaft of the first hydraulic cylinder 19 contracts and drives the crank 13 to descend, and the crank 13 drives the cover to descend, thereby closing the cover.

Specifically, the discharge assembly includes a discharge valve 18, a second hydraulic cylinder 20, and a bent rod 21. The discharge valve 18 is made of high-purity graphite material. The middle part of the bent rod 21 is installed on the outer wall of the furnace body 2 through a fixing column 23. One end of the bent rod 21 is fixedly connected to the discharge valve 18, and the other end of the bent rod 21 is hinged with a connecting rod 22. The end of the connecting rod 22 away from the bent rod 21 is fixedly connected to the output shaft end of the second hydraulic cylinder 20.

The discharge valve 18 is used to block the discharge port 24. The upper surface of the discharge valve 18 is engraved with multiple layers of protrusions in an annular shape from the middle to the outside. Each layer of protrusions meshes with the edge of the discharge port 24 of the furnace body 2, thereby improving the sealing effect of the discharge valve 18 and preventing the calcium aluminum alloy melt from leaking out. When the discharge valve 18 is opened, the output shaft of the second hydraulic cylinder 20 is contracted, and the output shaft of the second hydraulic cylinder 20 drives the connecting rod 22 to move upward, and the connecting rod 22 drives one end of the bent rod 21 to move upward, and the other end of the bent rod 21 moves downward and pulls the discharge valve 18 to open. When the discharge valve 18 is closed, the opposite is true.

Specifically, the cover is provided with a stirring assembly, which is composed of a stirring rod 25 and a servo motor 26. The stirring rod 25 penetrates the cover and is rotatably connected to the cover, and the output shaft end of the servo motor 26 is transmission-connected to the stirring rod 25. Blades are fixedly connected to the two branches at the lower end of the stirring rod 25.

The stirring assembly is used to stir the calcium aluminum alloy in the crucible 1 to accelerate the mixing of the calcium aluminum alloy melt. When stirring, the servo motor 26 is started, and the output shaft of the servo motor 26 drives the stirring rod 25 to rotate, and the stirring rod 25 drives the blades to rotate and stir the calcium aluminum alloy melt.

The calcium aluminum alloy melting and casting equipment shown in the present application also includes an electrical working box, in which a control panel is arranged, and the control panel is respectively connected to the servo motor 26, the first hydraulic cylinder 19, the second hydraulic cylinder 20, and the vacuum pump 6. Other electrical components for controlling the intermediate frequency power supply 8 are also arranged in the electrical working box.

The electrical working box is used to control the electrical components and parts on the calcium aluminum alloy casting equipment. The control board can be an industrial computer or an editable logic controller. The control board is equipped with a logic control program, a timing control program, a temperature control program, etc. to meet the normal operation and functional control of the equipment. The control board can control the start and stop of the servo motor 26, the first hydraulic cylinder 19, the second hydraulic cylinder 20, and the vacuum pump 6.

The calcium aluminum alloy melting and casting equipment shown in the present application also includes other parts and electrical components to ensure the normal operation of the equipment and the circuit control of the equipment during specific implementation, so as to make controllable adjustments according to the current implementation environment during specific implementation.

A calcium aluminum alloy melting and casting process is specifically implemented by adopting the above-mentioned calcium aluminum alloy melting and casting equipment, and the calcium aluminum alloy melting and casting process is suitable for a calcium aluminum alloy melting and casting equipment, and the process includes the following steps:

Step 1: Weigh 63 parts of metal calcium blocks with a calcium content of more than 99% and a particle size of less than 10mm; weigh 25 parts of national standard aluminum ingots with an aluminum content of more than 99.5%; weigh 12 parts of metal aluminum blocks with an aluminum content of more than 99.5% and a particle size of less than 30mm.

Step 2: Confirm that the calcium aluminum alloy casting equipment is operating normally, and put the national standard aluminum ingot into the bottom of the crucible 1; preheat the other two materials, the metal calcium block and the metal aluminum block to a certain temperature and place them in the crucible 1, and control the medium frequency power supply 8 to start through the electrical working box, and the inductor coil 10 heats up after the medium frequency power supply 8 is powered.

Step 3: The power of the medium frequency power supply 8 is adjusted to 150KW and the temperature is raised to about 700°C. The national standard aluminum ingot in the crucible 1 melts into a liquid state in about 7 minutes.

Step 4: slowly add the metal calcium block and the metal aluminum block into the liquid aluminum water, turn on the servo motor 26, and drive the stirring rod 25 to rotate and stir the added metal calcium block and the metal aluminum block, melt them into the aluminum water and fully contact the aluminum water temperature, so that the added metal calcium iron and metal aluminum blocks are quickly heated and melted.

Step 5: Control the electrical working box, adjust and increase the power of the medium frequency power supply 8, so that the crucible 1 is heated to about 840°C (this temperature needs to be slightly higher than the melting point of calcium), and the servo motor 26 drives the stirring rod 25 to rotate and stir continuously, so that the temperature in the crucible 1 is evenly increased to act on various raw materials, accelerate the degree of change of the alloy liquid, greatly improve the composition uniformity and quality stability of the calcium aluminum alloy, and fully and evenly mix and melt to form a calcium aluminum alloy melt.

Step six: start the second hydraulic cylinder 20 through the control panel, and the second hydraulic cylinder 20 drives the drain valve 18 to open through the bent rod 21, and the calcium-aluminum alloy melt flows out. The calcium-aluminum alloy melt flows into the calcium-aluminum alloy ingot casting device (the external equipment will not be repeated) through the guide groove (external equipment), and the calcium-aluminum alloy casting is completed using the calcium-aluminum alloy ingot casting device.

The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims (6)

1. A calcium aluminum alloy melting and casting device, which is installed on a building component foundation (11) and is used for melting calcium aluminum alloy, comprising a melting furnace and a movable cover body arranged on the melting furnace, characterized in that: it also includes a vacuum component and a drive component; the drive component is used to drive the cover body to open and close on the melting furnace; the melting furnace comprises a crucible (1) and a furnace body (2), the crucible (1) is arranged inside the furnace body (2) and a heat preservation chamber (17) is formed between the two, the crucible (1) is made of high-purity graphite material, a discharge port (24) is provided at the fixed connection between the crucible (1) and the inner bottom wall of the furnace body (2), a discharge component is installed at the discharge port (24), an inductor coil (10) is arranged on the outer wall of the crucible (1), and a high-purity graphite felt is provided on the inner wall of the furnace body (2) and located in the heat preservation chamber (17); The cover body comprises an inner cover (3) and an outer cover (4) which are fixedly connected together; an infrared thermometer (14) is arranged on the cover body; an air cavity is formed between the inner cover (3) and the outer cover (4); after the cover body and the furnace are sealed, the air cavity is connected to a heat preservation cavity (17); an air flow valve (12) is arranged on the inner cover (3); and the vacuum component is connected to the heat preservation cavity (17). 2. A calcium aluminum alloy melting and casting equipment according to claim 1, characterized in that: a power input component (9) is arranged in the insulation chamber (17), one end of the power input component (9) is electrically connected to the inductor (10), and the other end of the power input component (9) is electrically connected to the medium frequency power supply (8). 3. A calcium aluminum alloy melting and casting device according to claim 1, characterized in that: the vacuum component includes a vacuum pump (6), and the vacuum generating end of the vacuum pump (6) is connected to the insulation chamber (17) through an air supply pipe (7). 4. A calcium aluminum alloy melting and casting equipment according to claim 1, characterized in that: the driving assembly includes a first hydraulic cylinder (19), the output shaft end of the first hydraulic cylinder (19) is fixedly connected to a crank (13), and the end of the crank (13) away from the first hydraulic cylinder (19) is fixedly connected to the outer wall of the outer cover (4). 5. A calcium aluminum alloy melting and casting equipment according to claim 1, characterized in that: the discharge assembly includes a discharge valve (18), a second hydraulic cylinder (20), and a bent rod (21), the discharge valve (18) is made of high-purity graphite material, the middle part of the bent rod (21) is installed on the outer wall of the furnace body (2) through a fixing column (23), one end of the bent rod (21) is fixedly connected to the discharge valve (18), and the other end of the bent rod (21) is hinged with a connecting rod (22), and the end of the connecting rod (22) away from the bent rod (21) is fixedly connected to the output shaft end of the second hydraulic cylinder (20). 6. A calcium aluminum alloy melting and casting equipment according to claim 1, characterized in that: a stirring assembly is arranged on the cover body, and the stirring assembly consists of a stirring rod (25) and a servo motor (26), the stirring rod (25) passes through the cover body, and the stirring rod (25) is rotatably connected to the cover body, and the output shaft end of the servo motor (26) is transmission-connected to the stirring rod (25).