Space-grade vanadium-aluminum master alloy material melting equipment and method of use thereof

Abstract

The application discloses a space-grade vanadium-aluminum intermediate alloy material smelting equipment and a use method thereof, which comprises a hot smelting furnace body, a slag discharging assembly is fixedly connected to the top port of the hot smelting furnace body, a cover is arranged on the top port of the slag discharging assembly, a magnetic pole array rotor assembly is arranged below the cover, the bottom of the hot smelting furnace body is provided with a semispherical shell, and a plurality of saddle-shaped coils arranged in an annular array are inlaid in the semispherical shell; a liftable liquid level adjusting block is arranged below the magnetic pole array rotor assembly, and the application relates to the technical field of smelting equipment. The application solves the problem that the existing vanadium-aluminum smelting technology cannot meet the requirement of extreme uniformity of aerospace-grade materials due to the dead angle caused by insufficient stirring capacity, thereby leading to macroscopic and microscopic segregation of alloy components.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smelting equipment, in particular to a space-grade vanadium-aluminum intermediate alloy material smelting equipment and a use method thereof. BACKGROUND

[0002] In the smelting and preparation process of space-grade vanadium-aluminum intermediate alloy, ensuring the high uniformity of alloy composition is one of the core key technical indicators. In order to overcome the composition segregation tendency caused by the large difference in density between vanadium and aluminum, mechanical stirring is often used as an important means to strengthen the mixing of the melt and promote the diffusion of elements in the prior art.

[0003] However, this traditional mechanical stirring method has a series of inherent defects that are difficult to overcome, which seriously restricts the improvement of the quality of the final product:

[0004] Introducing foreign contamination and damaging the purity of the melt: mechanical stirrers are usually made of high-temperature-resistant ceramic materials such as zirconia and silicon nitride. In the harsh metallurgical environment of high temperature and high speed, the surface of the stirrer is continuously eroded, dissolved, and even peeled off by the high-activity vanadium-aluminum melt, leading to the inclusion of ceramic particles into the alloy melt. These foreign inclusions become defects in the material, significantly deteriorating the mechanical properties, fatigue strength, and long-term service reliability of the alloy, which cannot meet the extreme requirements of aerospace materials for purity.

[0005] There are dead angles in the stirring flow field, and the uniformity improvement is limited: the mechanical stirrer is usually of paddle type structure, and its stirring range is limited to the area near the paddle. The flow field formed by the paddle decays sharply from the paddle outward. This leads to the formation of "stirring dead angles" at the bottom corners, the central core area of the melt pool, and the parts far from the stirring shaft. The denser vanadium element will still settle and enrich in these dead angle areas, so that the macroscopic and microscopic composition segregation problems cannot be fundamentally solved, and the uniformity of the alloy organization cannot be guaranteed.

[0006] Poor equipment reliability and high maintenance cost: the mechanical stirrer and its transmission system are in a high-temperature vacuum environment for a long time, facing a series of engineering problems such as insufficient high-temperature strength of materials, bearing lubrication failure, and complex sealing structure, resulting in a high equipment failure rate. At the same time, the damaged stirrer needs to be replaced after the furnace is cooled down, which not only leads to production interruption and a long cycle, but also greatly increases the maintenance and operation cost of the equipment.

[0007] Therefore, although mechanical stirring improves the mixing effect of the melt to some extent, the core contradiction between "introducing pollution" and "uneven stirring" cannot be reconciled. Developing a new method that can realize full-area, efficient, and non-contact stirring to completely replace the traditional mechanical stirring has become an inevitable trend and urgent need for preparing space-grade vanadium-aluminum intermediate alloy with ultra-high uniformity and ultra-high purity. SUMMARY

[0008] In order to solve the problem that the stirring dead angle is caused by insufficient stirring capacity of the existing vanadium aluminum smelting technology, thereby causing macroscopic and microscopic segregation of alloy composition, and unable to meet the requirement of extreme uniformity of aerospace grade materials, the purpose of the present application is to provide a space-grade vanadium aluminum intermediate alloy material smelting equipment and a use method thereof.

[0009] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a space-grade vanadium aluminum intermediate alloy material smelting equipment, comprising a hot smelting furnace body, a slag discharge assembly is fixedly connected to the top port of the hot smelting furnace body, a cover is covered on the top port of the slag discharge assembly, a magnetic pole array rotor assembly is installed below the cover, the bottom of the hot smelting furnace body is provided with a hemispherical shell, and a plurality of saddle-shaped coils arranged in an annular array are embedded in the inside of the hemispherical shell; a liftable liquid level adjusting block is installed below the magnetic pole array rotor assembly.

[0010] The main magnetic field generated by the magnetic pole array rotor assembly and the modulated magnetic field generated by the plurality of saddle-shaped coils are coupled with each other, are vectorially superimposed in the hot smelting furnace body, and jointly form a three-dimensional electromagnetic field; the three-dimensional electromagnetic field implements non-contact and global stirring on the vanadium aluminum melt in the hot smelting furnace body through induced Lorentz force, and generates a vertical vortex that promotes the up-down convection of the lower melt in the hot smelting furnace body.

[0011] Preferably, it further comprises a U-shaped support, a first motor is fixedly installed in the inside of the U-shaped support, a first gear is connected to the output shaft of the first motor, the first gear is engaged with an arc-shaped gear rack fixedly installed on the outer wall of the hemispherical shell of the hot smelting furnace body, the hot smelting furnace body is rotatably installed on the inner side wall of the U-shaped support through a pin shaft, the axis of the pin shaft horizontally passes through the center of the hemispherical shell of the hot smelting furnace body, and an electric resistance heating block is embedded in the inner wall of the hot smelting furnace body, which is mainly used for smelting.

[0012] Preferably, a linear motor that drives in the vertical direction is fixedly installed on the outer wall of the hot smelting furnace body, a rectangular plate is fixedly installed on the transmission table of the linear motor, and the bottom of the rectangular plate is fixedly connected with the top surface of the cover.

[0013] Preferably, the magnetic pole array rotor assembly comprises a sleeve vertically rotatably penetrating the center of the cover, a turntable is fixedly sleeved with the outer wall close to the bottom of the sleeve, a heat insulation ring is fixedly connected to the bottom of the turntable, a plurality of electromagnetic pole columns arranged in an annular array are fixedly embedded in the inside of the heat insulation ring, the N / S polarity of the bottom ends of the plurality of electromagnetic pole columns is alternately arranged, a second gear is fixedly sleeved with the outer wall above the cover of the sleeve, a second motor is fixedly installed on the rectangular plate, and a third gear engaged with the second gear is connected to the output shaft of the second motor.

[0014] Preferably, the inner wall of the sleeve is rotationally sleeved with an inner cylinder, the top of the inner cylinder is fixedly installed with a first electric push rod, the telescopic rod of the first electric push rod is slidably sleeved with the inner wall of the inner cylinder, and the bottom of the telescopic end is fixedly connected with the top surface of the liquid level adjusting block; the first electric push rod is fixedly installed on the rectangular plate, the bottom of the liquid level adjusting block is provided with a spherical surface, and the outer wall of the liquid level adjusting block is inlaid with an electric resistance heating block.

[0015] Preferably, a cavity is arranged in the hemispherical shell at the bottom of the hot melting furnace body, the saddle-shaped coil is attached to the curved surface of the cavity, the saddle-shaped coil is embedded in the cavity in a circumferentially uniform distribution manner, and the opening plane of the saddle-shaped coil faces the central axis of the hot melting furnace body, for generating a modulated magnetic field distributed along the axial direction.

[0016] Preferably, the slag discharging assembly comprises a first cylindrical shell, a second cylindrical shell and a conical shell which are coaxially and fixedly connected in sequence from top to bottom, the outer diameter of the first cylindrical shell is smaller than the outer diameter of the second cylindrical shell, the large-diameter end of the conical shell is fixedly connected with the bottom end of the second cylindrical shell, the small-diameter end of the conical shell is fixedly connected with the top end of the hot melting furnace body, the bottom surface of the cover is covered with the top end of the first cylindrical shell, the inner wall of the second cylindrical shell is rotationally sleeved with a rotating ring, the first annular groove is arranged on the inner upper end surface close to the inner wall of the second cylindrical shell, and the second annular groove is arranged on the inner lower end surface close to the inner wall of the second cylindrical shell; the inner walls of the upper and lower ends of the rotating ring are rotationally sleeved with the inner walls of the first and second annular grooves, the end surface of the rotating ring inside the second annular groove is fixedly connected with a gear ring, a plurality of slag discharge ports are arranged in an annular array on the outer wall of the rotating ring, the inner wall of one side of the plurality of slag discharge ports is fixedly connected with a guide plate, the guide plate extends to the inner wall of the rotating ring and is inclined with respect to the radial direction of the rotating ring; the outer wall of the second cylindrical shell is provided with a slag discharge port, the outer wall of the rotating ring covers the slag discharge port for sealing; the bottom end of the conical shell is fixedly sleeved with an annular filter cylinder upward, the top end of the annular filter cylinder and the inner wall close to the bottom of the second cylindrical shell are fixedly connected with an annular filter plate, the bottom of the guide plate is slidably connected with the top surface of the annular filter plate; a third motor is fixedly installed on the outer wall of the second cylindrical shell, the output shaft of the third motor is connected with a fourth gear, the outer wall of the second cylindrical shell on the side of the gear ring is provided with a through hole, the fourth gear passes through the through hole and engages with the gear ring, the inner walls of the first cylindrical shell and the conical shell are inlaid with electric resistance heating blocks to avoid alloy liquid cooling and adhesion.

[0017] Preferably, the inner wall of the first cylindrical shell is sleeved with a lifting cylinder, the top surface of the cover is fixedly provided with a second electric push rod, the telescopic end of the second electric push rod is fixedly connected with the top port of the lifting cylinder, the outer wall of the first cylindrical shell is provided with a pouring opening, the lifting cylinder covers the inside end port of the pouring opening and is used for sealing; the outer wall of the lifting cylinder is also in sliding fit with the inner wall of the hot melting furnace body, the height of the lifting cylinder is greater than the sum of the height of the second cylindrical shell and the height of the conical shell; the lifting cylinder is made of heat-conducting material and is embedded with an electric resistance heating block in the inside, so that the alloy liquid is prevented from being cooled and adhered.

[0018] The application discloses a method for using a space-grade vanadium-aluminum intermediate alloy material melting equipment, and comprises the following steps.

[0019] S1, opening the cover from the top port of the slag discharge assembly, filling the vanadium-aluminum intermediate alloy material into the hot melting furnace body, and then covering the cover;

[0020] S2, heating the hot melting furnace body, and melting the vanadium-aluminum intermediate alloy material into alloy liquid;

[0021] S3, rotating the magnetic pole array rotor assembly, the main magnetic field generated by the magnetic pole array rotor assembly and the modulated magnetic field generated by the plurality of saddle-shaped coils are coupled with each other, and are vector superimposed in the hot melting furnace body to form a three-dimensional electromagnetic field; the three-dimensional electromagnetic field implements non-contact and full-range stirring on the vanadium-aluminum melt in the hot melting furnace body through induced Lorentz force, and generates a vertical vortex for promoting up-down convection of the lower melt in the hot melting furnace body, so that the vanadium-aluminum intermediate alloy material is sufficiently melted, and the slag and the gold in the molten liquid are sufficiently floated on the upper layer of the molten liquid.

[0022] S4, lowering the liquid level adjusting block, the bottom of the liquid level adjusting block is immersed below the liquid level, and the liquid level is raised to the slag discharge assembly;

[0023] S5, continuously rotating the magnetic pole array rotor assembly, under the centrifugal action, the floated slag and gold enter the slag discharge assembly, the liquid level of the liquid level adjusting block is lowered, the slag and gold are left in the slag discharge assembly, and then the slag and gold are discharged from the slag discharge assembly.

[0024] Compared with the prior art, the application has the following beneficial effects:

[0025] 1. Through the cooperative work of the magnetic pole array rotor assembly and the bottom saddle-shaped coil array, the application generates a three-dimensional electromagnetic field with a controllable space structure; the Lorentz force generated by the magnetic field not only drives the melt to rotate, but also generates a strong vertical component force, thereby forming an up-down convection vortex penetrating through the whole molten pool, realizing full-range stirring, and ensuring that elements with large density differences such as vanadium and aluminum are fully diffused and uniformly mixed in macro and micro aspects, thereby meeting the harsh requirements of aerospace materials on consistency.

[0026] 2. The up-down convection vortex makes the slag and gold more efficiently and sufficiently separated and floated to the upper layer of the molten liquid.

[0027] 3. The application adjusts the liquid level by the lifting of the liquid level adjusting block, and combines the centrifugal stirring of the three-dimensional electromagnetic field to gather and guide the dross to the annular filter plate; then the centrifugal action of the rotatable rotating ring rapidly throws out the filtered waste dross through the material guide plate.

[0028] 4. The application highly integrates the functions of smelting, stirring, dross removal, pouring and the like in one device, and does not need to stop the furnace for cooling and manual dross removal, thereby improving the production efficiency.

[0029] 5. The application realizes zero contact with the melt through the whole process of electromagnetic stirring, completely eliminates the risk of introducing foreign inclusions due to the erosion and falling of the stirring material, and greatly improves the purity of the melt, thereby laying a solid foundation for the alloy to obtain excellent mechanical properties and high-temperature stability. BRIEF DESCRIPTION OF DRAWINGS

[0030] The application will be further described in detail in combination with the drawings and specific embodiments:

[0031] Figure 1 It is a structure schematic diagram of the overall section of the application;

[0032] Figure 2 It is a structure schematic diagram of the dross removal assembly of the application;

[0033] Figure 3 It is a structure schematic diagram of the arrangement of the material guide plate of the application;

[0034] Figure 4 It is a structure schematic diagram of the section of the magnetic pole array rotor assembly of the application;

[0035] Figure 5 It is a bottom view schematic diagram of the arrangement of the saddle-shaped coil of the application.

[0036] In the drawings: 1, hot melting furnace body; 2, dross removal assembly; 201, first cylindrical shell; 202, second cylindrical shell; 203, conical shell; 204, rotating ring; 205, dross removal port; 206, material guide plate; 207, gear ring; 208, dross removal port; 209, annular filter cylinder; 210, annular filter plate; 211, third motor; 212, fourth gear; 213, liquid pouring port; 3, cover; 4, magnetic pole array rotor assembly; 401, sleeve; 402, rotating disc; 403, heat insulation ring; 404, electromagnetic pole column; 405, second gear; 406, second motor; 407, third gear; 5, saddle-shaped coil; 6, liquid level adjusting block; 601, inner cylinder; 602, first electric push rod; 7, U-shaped support; 8, first motor; 9, first gear; 10, arc-shaped rack; 11, linear motor; 12, rectangular plate; 13, lifting cylinder; 14, second electric push rod. DETAILED DESCRIPTION

[0037] The present application is described in detail by specific embodiments, and other advantages and effects of the present application can be easily understood by those skilled in the art from the content disclosed in the specification.

[0038] Please refer to Figures 1 to 5 It should be understood that the structures, proportions, sizes, etc. shown in the drawings attached to the specification are only used to illustrate the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the defined conditions under which the present application can be implemented, so they do not have technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technology disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the specification are only for the convenience of clear description, and are not used to limit the scope of the present application, and the change or adjustment of the relative relationship without substantially changing the technical content is also considered as the scope of the present application.

[0039] The present application provides a technical solution: a space-grade vanadium-aluminum intermediate alloy material melting equipment, the space-grade vanadium-aluminum intermediate alloy material melting equipment of the present application mainly includes a hot melting furnace body 1, a slag discharge assembly 2, a cover 3, a magnetic pole array rotor assembly 4, a saddle coil 5, a liquid level adjusting block 6, a U-shaped support 7, a linear motor 11, a lifting cylinder 13 and various driving and transmission components, and each component cooperates to realize efficient melting of alloy material, slag-gold separation and safe liquid pouring. The specific structure is as follows:

[0040] The hot melting furnace body 1 is the core cavity of the melting operation, and the bottom thereof is designed as a hemispherical shell. This structure can optimize the electromagnetic field distribution and the alloy liquid convection effect. A plurality of saddle coils 5 arranged in an annular array are inlaid in the hemispherical shell. A cavity is formed in the hemispherical shell at the bottom of the hot melting furnace body 1, the saddle coils 5 are attached to the curved surface of the cavity and are embedded in the cavity in a circumferentially uniform distribution manner, the opening plane thereof faces the central axis of the hot melting furnace body 1, and is used to generate a modulated magnetic field distributed along the axis. The inner wall of the hot melting furnace body 1 is inlaid with a resistance heating block, which provides a stable heat source for the melting of the alloy material, and at the same time avoids the alloy liquid from being cooled and adhered to the inner wall of the furnace body.

[0041] The slag discharge assembly 2 is fixedly connected to the top port of the hot melting furnace body 1, and is used for realizing slag-gold separation and waste slag discharge. Specifically, the slag discharge assembly 2 comprises, from top to bottom, a first cylindrical shell 201, a second cylindrical shell 202 and a conical shell 203 fixedly connected in sequence and coaxially. The outer diameter of the first cylindrical shell 201 is smaller than the outer diameter of the second cylindrical shell 202. The large-diameter port of the conical shell 203 is fixedly connected to the bottom port of the second cylindrical shell 202, and the small-diameter port of the conical shell 203 is fixedly connected to the top port of the hot melting furnace body 1.

[0042] The inner wall of the second cylindrical shell 202 is rotatably sleeved with a rotating ring 204. The first annular groove is arranged on the inner upper end surface of the second cylindrical shell 202 close to the inner wall. The second annular groove is arranged on the inner lower end surface of the second cylindrical shell 202 close to the inner wall. The inner walls of the upper and lower ends of the rotating ring 204 are rotatably sleeved with the inner walls of the first and second annular grooves, thereby ensuring stable rotation of the rotating ring 204. The end surface of the rotating ring 204 located in the second annular groove is fixedly connected with a gear ring 207. The outer wall of the rotating ring 204 is provided with a plurality of slag discharge ports 205 arranged in an annular array. The inner wall of one side of the plurality of slag discharge ports 205 is fixedly connected with a guide plate 206. The guide plate 206 extends to the inner wall of the rotating ring 204 and is inclined with respect to the radial direction of the rotating ring 204, thereby facilitating the introduction of waste slag into the slag discharge ports 205.

[0043] The outer wall of the second cylindrical shell 202 is provided with a slag outlet 208. The outer wall of the rotating ring 204 is normally covered at the slag outlet 208 to realize sealing, thereby avoiding leakage of alloy liquid or heat loss during smelting.

[0044] The bottom port of the conical shell 203 is fixedly sleeved with an annular filter cylinder 209 upward. The top port of the annular filter cylinder 209 is fixedly connected with an annular filter plate 210 together with the inner wall of the second cylindrical shell 202 close to the bottom. The bottom of the guide plate 206 is slidingly connected with the top surface of the annular filter plate 210. The annular filter plate 210 is used for intercepting waste slag, thereby realizing preliminary separation of slag and gold.

[0045] The outer wall of the second cylindrical shell 202 is fixedly installed with a third motor 211. The output shaft of the third motor 211 is connected with a fourth gear 212. The outer wall of the second cylindrical shell 202 located on the side of the gear ring 207 is provided with a through hole. The fourth gear 212 is movably arranged through the through hole and engaged with the gear ring 207. The rotating ring 204 is driven to rotate by the third motor 211, thereby completing the waste slag discharge action.

[0046] The inner walls of the first cylindrical shell 201 and the conical shell 203 are embedded with resistance heating blocks, thereby avoiding cooling and adhesion of alloy liquid in the slag discharge assembly 2.

[0047] The inner wall of the first cylindrical shell 201 is sleeved with the lifting cylinder 13, and the outer wall of the first cylindrical shell 201 is provided with the pouring opening 213. The lifting cylinder 13 is normally covered at the inner side port of the pouring opening 213 to realize sealing. The lifting cylinder 13 is made of heat-conducting material, and the inside of the lifting cylinder 13 is embedded with the resistance heating block, which further prevents the alloy liquid from cooling and adhering. The height of the lifting cylinder 13 is greater than the sum of the heights of the second cylindrical shell 202 and the conical shell 203, so as to guarantee the sealing effect during pouring.

[0048] The cover 3 is covered on the top port of the first cylindrical shell 201 in the slag discharge assembly 2, and is used for sealing the smelting cavity. The outer wall of the hot smelting furnace body 1 is fixedly provided with the linear motor 11 which is driven in the vertical direction. The transmission table of the linear motor 11 is fixedly provided with the rectangular plate 12. The bottom of the rectangular plate 12 is fixedly connected with the top surface of the cover 3. The cover 3 is driven to lift by the linear motor 11, so as to realize the opening and closing of the smelting cavity. The top surface of the cover 3 is fixedly provided with the second electric push rod 14. The telescopic end of the second electric push rod 14 is fixedly connected with the top port of the lifting cylinder 13. The lifting cylinder 13 is driven to lift by the second electric push rod 14, so as to realize the opening and closing control of the pouring opening 213.

[0049] The magnetic pole array rotor assembly 4 is installed below the cover 3, and is used for generating the main magnetic field. The magnetic pole array rotor assembly 4 specifically includes the sleeve 401 which is vertically rotated and penetrated at the center of the cover 3. The outer wall of the sleeve 401 close to the bottom is fixedly sleeved with the rotating disc 402. The bottom of the rotating disc 402 is fixedly connected with the heat insulation ring 403. The inside of the heat insulation ring 403 is fixedly embedded with the annular arrayed plurality of electromagnetic pole columns 404. The N / S polarity of the bottom ends of the plurality of electromagnetic pole columns 404 is alternately arranged, so as to guarantee the uniformity of the main magnetic field. The outer wall of the sleeve 401 above the cover 3 is fixedly sleeved with the second gear 405. The rectangular plate 12 is fixedly provided with the second motor 406. The output end of the second motor 406 is rotatably connected with the third gear 407 which is engaged with the second gear 405. The sleeve 401 is driven to rotate by the second motor 406, so that the electromagnetic pole columns 404 generate the rotating main magnetic field.

[0050] The liquid level adjusting block 6 is installed below the magnetic pole array rotor assembly 4, and is used for adjusting the alloy liquid level height and assisting the slag-gold separation. The inner wall of the sleeve 401 is rotatably sleeved with the inner cylinder 601. The top of the inner cylinder 601 is fixedly provided with the first electric push rod 602. The telescopic rod of the first electric push rod 602 is slidably sleeved with the inner wall of the inner cylinder 601. The bottom of the telescopic end is fixedly connected with the top surface of the liquid level adjusting block 6. The first electric push rod 602 is fixedly installed on the rectangular plate 12. The liquid level adjusting block 6 is driven to lift by the first electric push rod 602. The bottom of the liquid level adjusting block 6 is provided with the spherical surface, so as to reduce the hindrance to the alloy liquid flow. The outer wall of the liquid level adjusting block 6 is embedded with the resistance heating block, so as to avoid the alloy liquid from cooling and adhering.

[0051] The device further comprises a U-shaped support 7, a first motor 8 is fixedly installed inside the U-shaped support 7, an output shaft of the first motor 8 is connected with a first gear 9, the first gear 9 is engaged with an arc-shaped gear rack 10 which is fixedly installed on the outer wall of the hemispherical shell of the hot melting furnace body 1, the hot melting furnace body 1 is rotatably installed on the inner side wall of the U-shaped support 7 through a pin shaft, an axis of the pin shaft horizontally passes through the ball center of the hemispherical shell of the hot melting furnace body 1, the hot melting furnace body 1 is driven to tilt around the pin shaft through the first motor 8, and the pouring-out operation of the alloy molten liquid is completed in cooperation with the pouring port 213.

[0052] The rotating electromagnetic pole column 404 in the magnetic pole array rotor assembly 4 generates a main magnetic field, a plurality of saddle-shaped coils 5 at the bottom of the hot melting furnace body 1 generate a modulated magnetic field, the main magnetic field and the modulated magnetic field are coupled with each other, and a three-dimensional electromagnetic field is formed in the hot melting furnace body 1 through vector superposition. The three-dimensional electromagnetic field implements non-contact and full-domain stirring on the vanadium-aluminum melt in the hot melting furnace body 1 through induced Lorentz force, avoids pollution caused by contact stirring, simultaneously generates a vertical vortex which promotes up-and-down convection of the melt in the lower part of the hot melting furnace body 1, guarantees uniformity of alloy liquid composition, and improves smelting quality.

[0053] The device selects a resistance heating mode, the heating mode does not generate external electric field and magnetic field, and interference caused by three-dimensional electromagnetic field stirring is avoided.

[0054] The smelting operation is performed by using the above-mentioned aerospace-grade vanadium-aluminum intermediate alloy material smelting device, and the specific steps are as follows:

[0055] Raw material filling: the linear motor 11 drives the rectangular plate 12 to rise through the transmission table of the linear motor 11, and then drives the cover 3 to rise, opens the cover 3 from the top port of the slag removal assembly 2, and at the same time, the lifting cylinder 13 rises synchronously with the cover 3 and is pulled out from the inner wall of the first cylindrical shell 201; the vanadium-aluminum intermediate alloy material is filled into the hot melting furnace body 1, and then the linear motor 11 drives the cover 3 to descend and close, and the lifting cylinder 13 synchronously descends and covers the inside port of the pouring port 213 to seal the inside port.

[0056] Heating and smelting: all resistance heating blocks in the device are started, the hot melting furnace body 1 and related components are heated, and the vanadium-aluminum intermediate alloy material is smelted into alloy liquid.

[0057] Electromagnetic field stirring: the second motor 406 is started, the second motor 406 drives the heat insulation ring 403 and a plurality of electromagnetic pole columns 404 with N / S polarity alternately arranged to rotate through the third gear 407, the second gear 405, the sleeve 401 and the turntable 402 in sequence, the magnetic pole array rotor assembly 4 generates a rotating main magnetic field; the saddle-shaped coil 5 generates a modulated magnetic field, the main magnetic field and the modulated magnetic field are coupled to form a three-dimensional electromagnetic field, the vanadium-aluminum melt is stirred non-contactingly and fully through Lorentz force, a vertical vortex is generated to promote up-and-down convection of the melt, sufficient smelting is realized, and the slag and gold in the molten liquid float to the upper layer of the molten liquid under the stirring action.

[0058] Liquid level adjustment: the first electric push rod 602 is started to drive the liquid level adjustment block 6 to descend, the bottom of which is submerged below the alloy liquid level, forcing the liquid level to rise between the annular filter plate 210 and the bottom port of the first cylindrical shell 201, while the floating dross is squeezed to the circumference of the liquid level adjustment block 6, preparing for subsequent dross separation.

[0059] Waste slag discharge: the magnetic pole array rotor assembly 4 continues to rotate, under the action of centrifugal force, the dross around the liquid level adjustment block 6 enters above the annular filter plate 210; the first electric push rod 602 drives the liquid level adjustment block 6 to rise, the alloy liquid level drops, and the dross is intercepted on the annular filter plate 210; the third motor 211 is started, the third motor 211 drives the gear ring 207 to rotate through the fourth gear 212, synchronously rotating the rotating ring 204, and the guide plate 206 guides the dross on the annular filter plate 210 to the slag discharge port 205; when the slag discharge port 205 is turned to the slag outlet 208, the dross is thrown out from the slag outlet 208 under the action of centrifugal force; after the waste slag is completely discharged, the third motor 211 drives the rotating ring 204 to reset, the outer wall of the rotating ring 204 covers the slag outlet 208 to seal it, and the equipment continues to heat and smelt the molten liquid to ensure the quality of the alloy liquid.

[0060] Alloy liquid pouring: the second electric push rod 14 is started to drive the lifting cylinder 13 to descend, the lifting cylinder 13 seals the space in the second cylindrical shell 202 and the conical shell 203, and at the same time the pouring port 213 is opened; the first motor 8 is started, the first motor 8 drives the arc gear rack 10 through the first gear 9, and the hot melting furnace body 1 is tilted towards the direction of the pouring port 213, and the alloy molten liquid is poured out from the pouring port 213 for use.

[0061] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A space-grade vanadium-aluminum master alloy material smelting device, comprising a hot smelting furnace body (1), characterized in that: The top port of the hot melting furnace body (1) is fixedly connected with a slag discharge assembly (2), the top port of the slag discharge assembly (2) is covered with a cover (3), a magnetic pole array rotor assembly (4) is installed below the cover (3), the bottom of the hot melting furnace body (1) is provided with a hemispherical shell, and a plurality of saddle-shaped coils (5) are inlaid in the hemispherical shell in an annular array; a liftable liquid level adjusting block (6) is installed below the magnetic pole array rotor assembly (4); ​ The main magnetic field generated by the magnetic pole array rotor assembly (4) and the modulated magnetic field generated by the plurality of saddle-shaped coils (5) are coupled with each other, are vectorially superposed in the hot melting furnace body (1), and jointly form a three-dimensional electromagnetic field; the three-dimensional electromagnetic field implements non-contact and global stirring on the vanadium-aluminum melt in the hot melting furnace body (1) through induced Lorentz force, and generates a vertical vortex for promoting up-down convection of the melt in the lower part of the hot melting furnace body (1); A linear motor (11) that drives in the vertical direction is fixedly installed on the outer wall of the hot melting furnace body (1), a rectangular plate (12) is fixedly installed on the transmission table of the linear motor (11), and the bottom of the rectangular plate (12) is fixedly connected with the top surface of the cover (3); The magnetic pole array rotor assembly (4) comprises a sleeve (401) that is vertically rotatably penetrated in the center of the cover (3), a turntable (402) is fixedly sleeved with the outer wall close to the bottom of the sleeve (401), a heat insulation ring (403) is fixedly connected with the bottom of the turntable (402), a plurality of electromagnetic pole columns (404) are fixedly inlaid in the heat insulation ring (403) in an annular array, the N / S polarity of the bottom ends of the plurality of electromagnetic pole columns (404) is alternately arranged, a second gear (405) is fixedly sleeved with the outer wall above the sleeve (401), a second motor (406) is fixedly installed on the rectangular plate (12), and the output shaft of the second motor (406) is connected with a third gear (407) that is engaged with the second gear (405).

2. The space-grade vanadium-aluminum master alloy material melting apparatus according to claim 1, characterized in that: A U-shaped support (7) is further included, a first motor (8) is fixedly installed in the U-shaped support (7), a first gear (9) is connected with the output shaft of the first motor (8), an arc-shaped rack (10) is fixedly installed on the outer wall of the hemispherical shell of the hot melting furnace body (1) and engaged with the first gear (9), the hot melting furnace body (1) is rotatably installed on the inner side wall of the U-shaped support (7) through a pin shaft, the axis of the pin shaft passes through the center of the hemispherical shell of the hot melting furnace body (1) in a horizontal direction, and a resistance heating block is inlaid in the inner wall of the hot melting furnace body (1) and mainly used for smelting.

3. The space-grade vanadium-aluminum master alloy material melting apparatus according to claim 1, characterized in that: The inner wall of the sleeve (401) is rotationally sleeved with an inner cylinder (601), the top of the inner cylinder (601) is fixedly installed with a first electric push rod (602), the telescopic rod of the first electric push rod (602) is slidably sleeved with the inner wall of the inner cylinder (601), and the bottom of the telescopic end is fixedly connected with the top surface of a liquid level adjusting block (6); the first electric push rod (602) is fixedly installed on a rectangular plate (12), the bottom of the liquid level adjusting block (6) is provided with a spherical surface, and the outer wall of the liquid level adjusting block (6) is embedded with an electric resistance heating block.

4. The space-grade vanadium-aluminum master alloy material melting apparatus of claim 1, wherein: A cavity is arranged in the hemispherical shell at the bottom of the hot melting furnace body (1), the saddle-shaped coil (5) is attached to the curved surface of the cavity, the saddle-shaped coil is embedded in the cavity in a circumferentially uniform distribution manner, and the opening plane thereof faces the central axis of the hot melting furnace body (1), for generating a modulated magnetic field distributed along the axial direction.

5. The space-grade vanadium-aluminum master alloy material melting apparatus of claim 1, wherein: The slag discharge assembly (2) comprises a first cylindrical shell (201), a second cylindrical shell (202) and a conical shell (203) fixed and connected in sequence from top to bottom, the outer diameter of the first cylindrical shell (201) is smaller than the outer diameter of the second cylindrical shell (202), the large diameter end of the conical shell (203) is fixed and connected with the bottom end of the second cylindrical shell (202), the small diameter end of the conical shell (203) is fixed and connected with the top end of the hot melting furnace body (1), the bottom surface of the cover (3) covers the top end of the first cylindrical shell (201), the inner wall of the second cylindrical shell (202) is rotatably sleeved with a rotating ring (204), the first annular groove is arranged on the inner upper end surface close to the inner wall of the second cylindrical shell (202), and the second annular groove is arranged on the inner lower end surface close to the inner wall of the second cylindrical shell (202); the inner wall of the rotating ring (204) at the upper and lower ends is rotatably sleeved with the inner wall of the first annular groove and the second annular groove, the end surface of the rotating ring (204) in the second annular groove is fixedly connected with a gear ring (207), a plurality of slag discharge ports (205) are arranged in an annular array on the outer wall of the rotating ring (204), one side of the inner wall of the plurality of slag discharge ports (205) is fixedly connected with a guide plate (206), the guide plate (206) extends to the inner wall of the rotating ring (204), and the radial direction of the guide plate (206) with respect to the rotating ring (204) is inclined; the outer wall of the second cylindrical shell (202) is provided with a slag discharge port (208), the outer wall of the rotating ring (204) covers the slag discharge port (208) for sealing; the bottom end of the conical shell (203) is fixedly sleeved with an annular filter cylinder (209) upwards, the top end of the annular filter cylinder (209) and the inner wall close to the bottom of the second cylindrical shell (202) are fixedly connected with an annular filter plate (210), the bottom of the guide plate (206) is slidably connected with the top surface of the annular filter plate (210); the outer wall of the second cylindrical shell (202) is fixedly installed with a third motor (211), the output shaft of the third motor (211) is connected with a fourth gear (212), the outer wall of the second cylindrical shell (202) on the side of the gear ring (207) is provided with a through hole, the fourth gear (212) passes through the through hole and is engaged with the gear ring (207), and the inner walls of the first cylindrical shell (201) and the conical shell (203) are embedded with resistance heating blocks to avoid alloy liquid cooling and adhesion.

6. The space-grade vanadium-aluminum master alloy material melting apparatus of claim 5, wherein: The inner wall of the first cylindrical shell (201) is sleeved with a lifting cylinder (13), the top surface of the cover (3) is fixedly installed with a second electric push rod (14), the telescopic end of the second electric push rod (14) is fixedly connected with the top port of the lifting cylinder (13), the outer wall of the first cylindrical shell (201) is provided with a pouring opening (213), the lifting cylinder (13) covers the inner side port of the pouring opening (213) and is used for sealing; the outer wall of the lifting cylinder (13) is also in sliding fit with the inner wall of the hot melting furnace body (1), the height of the lifting cylinder (13) is greater than the sum of the heights of the second cylindrical shell (202) and the conical shell (203); the lifting cylinder (13) is made of heat-conducting material and is embedded with a resistance heating block inside, so that the alloy liquid is prevented from being cooled and adhered.

7. The method of using a space-grade vanadium-aluminum master alloy material melting apparatus, characterized in that, The aerospace-grade vanadium-aluminum intermediate alloy material smelting equipment of any one of claims 1-6 comprises the following steps: S1, opening the cover (3) from the top port of the slag discharge assembly (2), filling the vanadium-aluminum intermediate alloy material into the hot melting furnace body (1), and then closing the cover (3); S2, heating the hot melting furnace body (1) to smelt the vanadium-aluminum intermediate alloy material into alloy liquid; S3, rotating the magnetic pole array rotor assembly (4), the main magnetic field generated by the magnetic pole array rotor assembly (4) and the modulated magnetic field generated by the plurality of saddle-shaped coils (5) are coupled with each other, and are vector superimposed in the hot melting furnace body (1) to form a three-dimensional electromagnetic field; the three-dimensional electromagnetic field implements non-contact and full-domain stirring on the vanadium-aluminum melt in the hot melting furnace body (1) through induced Lorentz force, and generates a vertical vortex that promotes the up-down convection of the lower melt in the hot melting furnace body (1), so that the vanadium-aluminum melt is fully smelted, and the slag and the gold in the melt are fully floated on the upper layer of the melt; S4, lowering the liquid level adjusting block (6), the bottom of which is immersed below the liquid level, and the liquid level is raised to the position of the slag discharge assembly (2); S5, continuously rotating the magnetic pole array rotor assembly (4), under the centrifugal action, the floated slag and gold enter the slag discharge assembly (2), the liquid level of the liquid level adjusting block (6) is lowered, the slag and gold are left in the slag discharge assembly (2), and then the slag and gold are discharged from the slag discharge assembly (2).

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