CN210966977U

CN210966977U - Square tungsten molybdenum induction sintering furnace

Info

Publication number: CN210966977U
Application number: CN201921755887.XU
Authority: CN
Inventors: 邢朋娟; 严磊; 惠圆圆; 刘艳; 但振坤
Original assignee: Xi'an Chenghang Furnace Industry Co ltd
Current assignee: Xi'an Chenghang Furnace Industry Co ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-07-10
Anticipated expiration: 2029-10-18

Abstract

The utility model provides a square tungsten-molybdenum induction sintering furnace, which comprises a heating body, a fire-resistant device, an induction coil, a furnace body, a lifting system and a skip car; the heating body, the fire-resistant device and the induction coil are all arranged in the center of the bottom in the furnace body, the fire-resistant device is positioned outside the heating body, and the induction coil is arranged outside the fire-resistant device; the skip car is arranged on a lifting platform at the lower end of the lifting system, and the skip car is positioned below the furnace body; the top end of the lifting system is positioned at one side of the middle lower part of the furnace body. The utility model discloses well heat-generating body, refractory device, induction coil all adopt the rectangle structure, and this kind of structure can make the tungsten molybdenum slab goods level of being sintered place on the blowing collet, and furthest has improved by sintered material's bending deformation, reduces substantially the alignment levelling process of tungsten molybdenum goods, and reduction in production cost avoids the heating of school type in-process and the influence of pressure working to the goods quality simultaneously.

Description

Square tungsten molybdenum induction sintering furnace

Technical Field

The utility model belongs to tungsten molybdenum processing equipment field especially relates to a square tungsten molybdenum response fritting furnace.

Background

The medium frequency induction sintering furnace is an important device widely used in the special metal processing industry of tungsten, molybdenum and the like. Induction heating is one of the good forms of electric heating, and it utilizes the faraday's electromagnetic induction principle to convert electric energy into heat energy, so that a three-phase power supply is changed into intermediate frequency alternating current by means of an intermediate frequency induction power supply, and after the alternating current passes through an induction coil, an alternating induction magnetic field is produced, i.e. an alternating magnetic flux phi whose size and direction are changed with time is produced. When a piece of conductive metal (namely tungsten and molybdenum workpieces) is placed in the induction coil, corresponding induced electromotive force can be generated inside the metal according to a Faraday's law of electromagnetic induction, the induced current can be generated due to the existence of the induced electromotive force even if the metal is a conductor, the induced current is called eddy current, and according to the Joule-Lenz law, the eddy current can generate certain heat when flowing inside the metal with certain resistance, so that the metal is heated.

At present, the hearth of a tungsten-molybdenum sintering furnace which is conventionally used is round, and when a plate blank is sintered, the space utilization rate is low, the energy consumption is high, the efficiency is low, and the requirement for large-scale sintering of the plate blank cannot be met. In addition, in the sintering process, due to insufficient charging, the slab is easy to deform in the sintering process, so that the subsequent processing and manufacturing are inconvenient, in order to save cost, the deformed slab needs to be heated and corrected, the production cost is increased, and the quality of the product is influenced by heating and pressure processing in the correction process.

SUMMERY OF THE UTILITY MODEL

In order to overcome when present slab sintering, space utilization is low, the energy consumption is big, inefficiency, and is with high costs, the slab easily produces the problem of deformation in sintering process, the utility model provides a square tungsten molybdenum response fritting furnace, the utility model discloses well heat-generating body, refractory apparatus, induction coil all adopt the rectangle structure, and this kind of structure can make the tungsten molybdenum slab product level of being sintered place on the blowing collet, and furthest has improved the bending deformation by sintered material, reduces substantially the alignment levelling process of tungsten molybdenum product, and reduction in production cost avoids the heating of school type in-process and the influence of pressure process to the goods quality simultaneously.

The utility model adopts the technical proposal that:

a square tungsten-molybdenum induction sintering furnace comprises a heating body, a fire-resistant device, an induction coil, a furnace body, a lifting system and a skip car; the heating body, the fire-resistant device and the induction coil are all arranged in the center of the bottom in the furnace body, the fire-resistant device is positioned outside the heating body, and the induction coil is arranged outside the fire-resistant device; the skip car is arranged on a lifting platform at the lower end of the lifting system, and the skip car is positioned below the furnace body; the top end of the lifting system is positioned at one side of the middle lower part of the furnace body.

The furnace body is a cylindrical furnace body.

The heating element is made of tungsten products and consists of short tungsten strips, spigots and long tungsten strips; the short tungsten strips and the long tungsten strips are connected through the seam allowance, the short tungsten strips and the long tungsten strips are spliced to form a layer of square tungsten strips, four corners of each square tungsten strip are corners of a heating body, the tungsten strips spliced in each layer are overlapped layer by layer to form the heating body, and seams of the long tungsten strips and the short tungsten strips are mutually staggered in the overlapping process; a gap of 5-25mm is left between the heating body and the refractory material.

The induction coil at least comprises a copper pipe, bakelite stand columns, an extraction electrode and an electrode flange, wherein the copper pipe is wound into a coil shape, and the bakelite stand columns are uniformly distributed on the outer surface of the copper pipe wound into the coil shape and fix the copper pipe; the copper pipe is connected with the electrode flange through an extraction electrode; an expansion gap of 5-30mm is reserved between the induction coil and the refractory device.

The lifting system at least comprises a motor and four ball screws, the motor is connected with the four ball screws through speed reducers respectively, the bottom ends of the four ball screws are provided with lifting platforms, and the motor is arranged at the top ends of the four ball screws.

The refractory device at least comprises a furnace core and a furnace lining, wherein the furnace core is made of refractory materials and is positioned in the middle of the inside of the furnace lining; the furnace lining comprises an inner lining, a middle lining, a bottom support and an outer lining, wherein the middle lining is arranged on the periphery of the inner lining, the outer lining is arranged on the periphery of the middle lining, the cross sections of the inner lining, the middle lining and the outer lining are square, a first expansion gap is arranged between the inner lining and the middle lining, a second expansion gap is arranged between the middle lining and the outer lining, the range of the first expansion gap and the range of the second expansion gap are both 5-30mm, and the inner lining, the middle lining and the outer lining are all arranged on the bottom support; the stove core include outer stove core and inlayer stove core, wherein the inlayer stove core is filled inside outer stove core, inlayer stove core central point puts and is equipped with the air vent that link up from top to bottom, wherein the cross section of outer stove core and inlayer stove core is square, be equipped with the dilatation joint between outer stove core and the inlayer stove core, wherein the scope of dilatation joint is 0.2~5 mm.

The outer-layer furnace core is formed by stacking outer-layer top layer bricks, outer-layer upper layer bricks, outer-layer middle layer bricks and outer-layer bottom layer bricks, wherein the multiple layers of outer-layer middle layer bricks are stacked on the upper end face of the outer-layer bottom layer bricks, the outer-layer upper layer bricks are stacked on the uppermost ends of the multiple layers of outer-layer middle layer bricks, and the outer-layer top layer bricks are stacked on the upper end face of the outer-layer upper layer bricks; the inner layer furnace core is built by the core brick and forms, and wherein the core brick is square or cuboid structure, and wherein the core brick tiling is built in outer furnace core inboard, and wherein the scope of expansion joint between two adjacent core bricks is 0.2~5 mm.

The lining, the middle lining and the outer lining are all built by shaped bricks, wherein the shaped bricks of the lining are made of heavy zirconia, the shaped bricks made of the heavy zirconia have the functions of high temperature resistance and heat insulation, the shaped bricks of the middle lining are made of zirconia hollow spheres, the shaped bricks made of the zirconia hollow spheres have the function of heat insulation, the shaped bricks of the outer lining are made of alumina hollow spheres, and the shaped bricks made of the alumina hollow spheres have the functions of heat insulation and insulation; the inner lining is built on the upper side edge of the upper layer bottom support through the shaped bricks, the middle lining is built on the upper side edge of the middle layer bottom support through the shaped bricks, the outer lining is built on the upper side edge of the lower layer bottom support through the shaped bricks, the top height of the outer lining is larger than that of the inner lining and the middle lining, the top heights of the inner lining and the middle lining are the same, the thickness of the shaped bricks of the inner lining is larger than that of the shaped bricks of the middle lining, and the thickness of the shaped bricks of the middle lining is larger than that of the shaped bricks of the outer lining.

The utility model has the advantages that:

the utility model discloses well heat-generating body, refractory device, induction coil all adopt the rectangle structure, and this kind of structure can make the tungsten molybdenum slab goods level of being sintered place on the blowing collet, and furthest has improved by sintered material's bending deformation, reduces substantially the alignment levelling process of tungsten molybdenum goods, and reduction in production cost avoids the heating of school type in-process and the influence of pressure working to the goods quality simultaneously. The utility model discloses a after changing circular heat-generating body into square heat-generating body, the tungsten molybdenum product by the sintering can keep flat on the blowing collet, and furthest has improved by sintered material's bending deformation, reduces substantially the alignment levelling technology of tungsten molybdenum product, has improved product quality.

The utility model provides a square heat-generating body can increase furnace's utilization ratio, and energy resource consumption is few, and the productivity is big, and square tungsten molybdenum response fritting furnace can use for a long time under 2500 ℃ of temperature.

The utility model provides a rate of recovery of material can reach more than 70% after square heat-generating body is scrapped, can practice thrift a large amount of valuable tungsten materials, is that the production consumption reduces substantially, practices thrift manufacturing cost.

The following will be further described with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a front view of a heat generating body assembly.

FIG. 3 is a plan view of a heat-generating body assembly.

FIG. 4 is a front view of the refractory assembly.

FIG. 5 is a top view of the refractory assembly.

FIG. 6 is a front view of a refractory device core.

Fig. 7 top view of an induction coil.

Fig. 8 is a front view of an induction coil.

In the figures, the reference numbers are: 1. a heating element; 101. a corner of the heating element; 102. short tungsten bars; 103. stopping the opening; 104. a long tungsten bar; 2. a refractory device; 3. an induction coil; 301. a copper pipe; 302. a bakelite column; 303. leading out an electrode; 304. an electrode flange; 4. a furnace body; 5. a lifting system; 6. a skip car; 7. a furnace core; 701. an outer layer furnace core; 702. an inner layer furnace core; 703. a vent hole; 704. an outer layer of top layer bricks; 705. the outer layer is a brick; 706. an outer layer and a middle layer brick; 707. outer layer bottom layer bricks; 8. a furnace lining; 801. a liner; 802. a middle lining; 803. an outer liner; 804. forming bricks; 805. an upper layer bottom support; 806. a middle layer bottom support; 807. the lower layer collet.

Detailed Description

Example 1:

in order to overcome current slab sintering time, space utilization is low, the energy consumption is big, inefficiency, and is with high costs, the slab easily produces the problem of deformation in sintering process, the utility model provides a square tungsten molybdenum response fritting furnace as shown in fig. 1-8, the utility model discloses well heat-generating body, refractory device, induction coil all adopt the rectangle structure, and this kind of structure can make the tungsten molybdenum slab goods level of being sintered place on the blowing collet, and furthest has improved by sintering material's bending deformation, reduces substantially the alignment process of tungsten molybdenum goods, reduction in production cost avoids the heating of school type in-process and the influence of pressure working to the goods quality simultaneously.

A square tungsten-molybdenum induction sintering furnace comprises a heating body 1, a refractory device 2, an induction coil 3, a furnace body 4, a lifting system 5 and a skip car 6; the heating body 1, the refractory device 2 and the induction coil 3 are all arranged in the center of the bottom in the furnace body 4, the refractory device 2 is positioned outside the heating body 1, and the induction coil 3 is arranged outside the refractory device 2; the skip car 6 is arranged on a lifting platform at the lower end of the lifting system 5 and is positioned below the furnace body 4; the top end of the lifting system 5 is positioned at one side of the middle lower part of the furnace body 4.

The utility model provides a square tungsten molybdenum response fritting furnace is become alternating magnetic field with electric energy conversion by the intermediate frequency unit, by square crucible as heat-generating body 1, utilizes square induction coil 3 to carry out induction heating, and equipment temperature reaches 2500 ℃ and adopts square refractory device 2 to keep warm. During charging, the sintering material is placed on the skip car 6, the skip car 6 is opened and is stably transported to the lower part of the heating chamber, the skip car 6 is stably lifted to the center of the heating chamber by the lifting system 5, and a furnace mouth is locked to heat. A gap is required to be reserved between the heating body 1 and the square fire-resistant device 2, so that the heating body can be used when being heated and expanded. An expansion gap is reserved between the square fire-resistant device 2 and the square induction coil 3, so that the use in the heating expansion process is guaranteed. The utility model discloses in the operating system 5 that provides adopt a motor to drive four ball synchronous lifts, reaches the purpose of material lift, requires to operate steadily among the operation process, and speed is adjustable, must not rock. Four wheels of the skip car 6 are driven by four motors simultaneously, so that materials can be conveyed to a position convenient for hoisting stably, and the skip car is adjustable in speed. The utility model discloses utilize square induction coil 3 to carry out induction heating, crucible or sintering material in the induction coil 3 receive alternating magnetic field's continuous cutting, produce induced electromotive force in crucible or sintering material, produced the vortex promptly, make crucible or material reach the purpose that generates heat.

The utility model discloses a after changing circular heat-generating body into square heat-generating body, the tungsten molybdenum product by the sintering can keep flat on the blowing collet, and furthest has improved by sintered material's bending deformation, reduces substantially the alignment levelling technology of tungsten molybdenum product, has improved product quality. The square heating body can increase the utilization rate of the hearth, the energy consumption is low, and the capacity is high. The recovery rate of the scrapped square heating element can reach more than 70 percent, a large amount of valuable tungsten materials can be saved, the production consumption is greatly reduced, and the production cost is saved. The utility model discloses well heat-generating body 1, refractory device 2, induction coil 3 all adopt the rectangle structure, and this kind of structure can make the tungsten molybdenum slab goods level of being sintered place on the blowing collet, and furthest has improved the bending deformation by sintered material, reduces substantially the alignment levelling process of tungsten molybdenum goods, and reduction in production cost avoids the heating of school type in-process and the influence of pressure working to the goods quality simultaneously. The hearth structure greatly increases the charging utilization rate of the hearth, and compared with a vertical circular structure, the energy consumption is greatly reduced, and the market competitiveness of products is effectively improved.

Example 2:

based on the embodiment 1, in this embodiment, the furnace body 4 is a cylindrical furnace body.

The heating element 1 is made of tungsten products, and the heating element 1 consists of a short tungsten bar 102, a spigot 103 and a long tungsten bar 104; the short tungsten strips 102 are connected with the long tungsten strips 104 through the seam allowances 103, the short tungsten strips 102 are spliced with the long tungsten strips 104 to form a layer of square tungsten strips, four corners of each square tungsten strip are heating body corners 101, the tungsten strips spliced on each layer are overlapped layer by layer to form a heating body 1, and seams of the long tungsten strips 104 and the short tungsten strips 102 are mutually staggered; a gap of 5-25mm is left between the heating element 1 and the refractory 102.

The utility model discloses well every layer of tungsten strip successive layer that splices superposes, constitutes square heat-generating body 1, and the seam of long tungsten strip 104 and short tungsten strip 102 staggers each other during the stack, and is free state between the every tungsten strip, does not need the welding. After the service life of the heating element 1 is reached, the tungsten bar can be disassembled, and the tungsten bar with small deformation can be recycled for use in the manufacture of a new heating element, in the actual production, the recovery rate of the scrapped heating element material can reach more than 70 percent, a large amount of valuable tungsten materials can be saved, the production consumption is greatly reduced, and the production cost is saved. Meanwhile, the combination can adjust the size of the heating element by adjusting the length of the tungsten bar, and further adjust the gap between the heating element and the induction coil, so that the heat efficiency of the intermediate frequency furnace reaches the optimal state.

The utility model provides a be free state between every tungsten strip, do not need the welding, tungsten strip butt joint face forms conductive loop very easily under high temperature softening and material dead weight pressure about during the use, makes intermediate frequency induced-current ability form closed loop in adjacent tungsten strip. Because each tungsten bar forming the heating element 1 is made of metal tungsten which is forged compactly in advance, the electric conductivity of the tungsten bar is much better than that of tungsten in a powder metallurgy state, the heat efficiency of the heating element is a normal set value from the beginning, and the transition process of metallization is avoided.

The utility model provides a heat-generating body 1 is square crucible, utilizes square induction coil 3 to carry out induction heating. The highest temperature of the equipment is required to be 2500 ℃, and the material of the heating body 1 is selected to be a tungsten product; the heating element 1 is formed by rolling and cutting the tungsten bar; the required density of the tungsten bar of the heating body 1 can reach 18.5t/m³The above.

Example 3:

based on embodiment 1, in this embodiment, the induction coil 3 at least includes a copper pipe 301, bakelite columns 302, an extraction electrode 303 and an electrode flange 304, the copper pipe 301 is wound into a coil shape, and the bakelite columns 302 are uniformly distributed on the outer surface of the copper pipe 301 wound into the coil shape and fix the copper pipe 301; the copper pipe 301 is connected with the electrode flange 304 through an extraction electrode 303; an expansion gap of 5-30mm is reserved between the induction coil 3 and the refractory device 2.

The utility model discloses when utilizing bakelite stand 302 fixed induction coil 3, bakelite stand 302 evenly distributed, and the interval is between 240 supple of water 560mm, guarantee induction coil 3 after the fixing stable and reliable, induction coil 3 need inject cooling water to copper pipe 301 inside when the ohmic heating, the cooling water quality requirement is that the temperature of intaking is no more than 25 + -5 ℃, the pH value is between 6-9 scope, resistivity 30 × 10 is omega. cm hardness is not more than 10 degrees (every degree is 10mg calcium oxide in 1 liter aquatic), total solid content does not exceed 250 mg/L, the leaving water temperature should be controlled below 45 degrees centigrade, because induction coil 3 when circular telegram, copper pipe 301 surface has the electric current to pass through, induction coil 3 inside cooling water also can have voltage, need take certain insulating measure when requiring the return water, insulate, guarantee safety induction coil 3 is the part that surface circular telegram inside leads to water, require the electric conduction of connected electrode flange 304 to leak when passing through water, guarantee that the electric current passes through when circular telegram, electrode 304's seal groove and seal ring should carry out the calculation of sealing ring, the sealing ring size of sealing ring, 3 MPa of induction coil 3-sealing ring and the sealing ring size of the test of punching a response, it is not to accomplish the leakage, 3.48.48.

Example 4:

based on the embodiments 1 to 3, in this embodiment, the lifting system 5 at least includes a motor and four ball screws, the motor and the four ball screws are respectively connected through a speed reducer, the bottom ends of the four ball screws are provided with a lifting platform, and the motor is arranged at the top ends of the four ball screws.

The refractory device 2 at least comprises a furnace core 7 and a furnace lining 8, wherein the furnace core 7 is made of refractory materials and is positioned in the middle inside the furnace lining 8; the furnace lining 8 comprises an inner lining 801, a middle lining 802, a bottom support and an outer lining 803, wherein the middle lining 802 is sleeved on the periphery of the inner lining 801, the outer lining 803 is sleeved on the periphery of the middle lining 802, the cross sections of the inner lining 801, the middle lining 802 and the outer lining 803 are square, a first expansion gap is formed between the inner lining 801 and the middle lining 802, a second expansion gap is formed between the middle lining 802 and the outer lining 803, the range of the first expansion gap and the range of the second expansion gap are both 5-30mm, and the inner lining 801, the middle lining 802 and the outer lining 803 are all arranged on the bottom support; the furnace core 7 comprises an outer layer furnace core 701 and an inner layer furnace core 702, wherein the inner layer furnace core 702 is filled in the outer layer furnace core 701, the central position of the inner layer furnace core 702 is provided with a vent hole 703 which is vertically communicated, the cross sections of the outer layer furnace core 701 and the inner layer furnace core 702 are both square, an expansion gap is arranged between the outer layer furnace core 701 and the inner layer furnace core 702, and the range of the expansion gap is 0.2-5 mm.

The outer-layer furnace core 701 is formed by stacking an outer-layer top brick 704, an outer-layer upper brick 705, an outer-layer middle brick 706 and an outer-layer bottom brick 707, wherein the plurality of layers of outer-layer middle bricks 706 are stacked on the upper end surface of the outer-layer bottom brick 707, the outer-layer upper brick 705 is stacked on the uppermost end of the plurality of layers of outer-layer middle bricks 706, and the outer-layer top brick 704 is stacked on the upper end surface of the outer-layer upper brick 705; the inner layer furnace core 702 is built by core bricks 708, wherein the core bricks 708 are in a cube or cuboid structure, the core bricks 708 are tiled and built on the inner side of the outer layer furnace core 701, and the expansion gap between two adjacent core bricks 708 is 0.2-5 mm.

The inner lining 801, the middle lining 802 and the outer lining 803 are built by shaped bricks 804, wherein the shaped bricks 804 of the inner lining 801 are made of heavy zirconia, the shaped bricks 804 made of the heavy zirconia play a role in high temperature resistance and heat insulation, the shaped bricks 804 of the middle lining 802 are made of zirconia hollow spheres, the shaped bricks 804 made of the zirconia hollow spheres play a role in heat preservation, and the shaped bricks 804 of the outer lining 803 are made of alumina hollow spheres, wherein the shaped bricks 804 made of the alumina hollow spheres play a role in heat preservation and insulation; the inner lining 801 is built on the upper side edge of an upper layer base plate 805 by a shaped brick 804, the middle lining 802 is built on the upper side edge of a middle layer base plate 806 by a shaped brick 804, the outer lining 803 is built on the upper side edge of a lower layer base plate 807 by a shaped brick 804, the top height of the outer lining 803 is larger than that of the inner lining 801 and the middle lining 802, the top heights of the inner lining 801 and the middle lining 802 are the same, the thickness of the shaped brick 804 of the inner lining 801 is larger than that of the shaped brick 804 of the middle lining 802, and the thickness of the shaped brick 804 of the middle lining 802 is larger than that of the shaped brick 804 of the outer lining 803.

The collet includes upper collet 805, middle level collet 806 and lower floor's collet 807, and wherein middle level collet 806 sets up in lower floor's collet 807 up end, and wherein upper collet 805 sets up in middle level collet 806 up end, upper collet 805, middle level collet 806 and lower floor's collet 807 are the square structure of inside annular space, and wherein the size of lower floor's collet 807 is greater than the size of middle level collet 806, and wherein the size of middle level collet 806 is greater than the size of upper collet 805.

A square furnace core 7 is arranged below the inner side of the furnace lining, wherein the top of the square furnace core 7 is flush with the top of the upper bottom support 805, the length of a lining 701 of the furnace lining 7 is 1570mm, and the width of the lining 7 is 1370 mm. The shaped bricks 804 include square shaped bricks for piling four sides of the square shaped inner liner 801/middle liner 802/outer liner 803 and rounded shaped bricks for piling four corners of the square shaped inner liner 801/middle liner 802/outer liner 803, and each shaped brick 804 has a weight ranging from 5kg to 15 kg. The square shaped bricks are of square structures, and the round-corner shaped bricks are of tile-shaped structures.

The utility model discloses what furnace lining 8 adopted is square structure, and wick 7 is also square structure, and this kind of structure can make and be placed on square wick by sintering tungsten molybdenum slab goods level, because square wick top flushes with upper strata base top, furthest has improved the bending deformation by sintering tungsten molybdenum slab goods, reduces substantially the alignment levelling process of tungsten molybdenum goods, reduction in production cost avoids the heating of school type in-process and the influence of pressure working to the goods quality simultaneously.

The utility model discloses the shaped brick 804 of inside lining 801 of furnace lining 8 is made by heavy zirconia, plays high temperature resistant thermal-insulated effect, and the shaped brick 804 of well lining 802 is made by the zirconia clean shot, plays heat retaining effect, and the shaped brick 804 of outer lining 803 is made by the alumina clean shot, plays heat preservation and insulating effect, and this refractory material can increase the life and the utilization ratio of furnace lining 8, reduces energy consumption, uses under 2500 ℃ of conditions for a long time through many times the utility model discloses square furnace lining 8 to indeformable or ablation can prove the utility model discloses square furnace lining 8 can use under 2500 ℃ of temperatures for a long time.

The utility model discloses heat-generating body 1, refractory device 2, induction coil 3 all adopt the rectangle structure, and this kind of structure can make the tungsten molybdenum slab goods level of being sintered place on the blowing collet, and furthest has improved by sintered material's bending deformation, reduces substantially the alignment process of tungsten molybdenum goods, and reduction in production cost avoids the heating of school type in-process and the influence of pressure working to the goods quality simultaneously. The hearth structure greatly increases the charging utilization rate of the hearth, and compared with a vertical circular structure, the energy consumption is greatly reduced, and the market competitiveness of products is effectively improved.

The above illustration is merely an illustration of the present invention, and does not limit the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention. The devices and their structural components not described in detail in this embodiment are well known in the art and commonly used in the industry, and will not be described herein.

Claims

1. A square tungsten-molybdenum induction sintering furnace is characterized in that: comprises a heating body (1), a fireproof device (2), an induction coil (3), a furnace body (4), a lifting system (5) and a skip car (6); the heating body (1), the fire-resistant device (2) and the induction coil (3) are all arranged in the center of the bottom in the furnace body (4), the fire-resistant device (2) is positioned outside the heating body (1), and the induction coil (3) is arranged outside the fire-resistant device (2); the skip car (6) is arranged on a lifting platform at the lower end of the lifting system (5), and is positioned below the furnace body (4); the top end of the lifting system (5) is positioned at one side of the middle lower part of the furnace body (4).

2. The square tungsten-molybdenum induction sintering furnace according to claim 1, wherein: the furnace body (4) is a cylindrical furnace body.

3. The square tungsten-molybdenum induction sintering furnace according to claim 1, wherein: the heating element (1) is made of tungsten products, and the heating element (1) consists of a short tungsten bar (102), a spigot (103) and a long tungsten bar (104); the short tungsten strips (102) are connected with the long tungsten strips (104) through the seam allowances (103), the short tungsten strips (102) and the long tungsten strips (104) are spliced to form a layer of square tungsten strips, four corners of each square tungsten strip are corners (101) of a heating body, the tungsten strips spliced on each layer are overlapped layer by layer to form the heating body (1), and seams of the long tungsten strips (104) and the short tungsten strips (102) are staggered mutually; a gap of 5-25mm is left between the heating body (1) and the refractory material (102).

4. The square tungsten-molybdenum induction sintering furnace according to claim 3, wherein: the induction coil (3) at least comprises a copper pipe (301), bakelite upright posts (302), an extraction electrode (303) and an electrode flange (304), wherein the copper pipe (301) is wound into a coil shape, and the bakelite upright posts (302) are uniformly distributed on the outer surface of the copper pipe (301) wound into the coil shape and fix the copper pipe (301); the copper pipe (301) is connected with the electrode flange (304) through an extraction electrode (303); an expansion gap of 5-30mm is reserved between the induction coil (3) and the refractory device (2).

5. The square tungsten-molybdenum induction sintering furnace according to claim 1, wherein: the lifting system (5) at least comprises a motor and four ball screws, the motor is connected with the four ball screws through speed reducers respectively, lifting platforms are arranged at the bottom ends of the four ball screws, and the motor is arranged at the top ends of the four ball screws.

6. The square tungsten-molybdenum induction sintering furnace according to claim 1, wherein: the refractory device (2) at least comprises a furnace core (7) and a furnace lining (8) which are made of refractory materials, and the furnace core (7) is positioned in the middle inside the furnace lining (8); the furnace lining (8) comprises an inner lining (801), a middle lining (802), a bottom support and an outer lining (803), wherein the middle lining (802) is sleeved on the periphery of the inner lining (801), the outer lining (803) is sleeved on the periphery of the middle lining (802), the cross sections of the inner lining (801), the middle lining (802) and the outer lining (803) are square, a first expansion joint is arranged between the inner lining (801) and the middle lining (802), a second expansion joint is arranged between the middle lining (802) and the outer lining (803), the range of the first expansion joint and the range of the second expansion joint are both 5-30mm, and the inner lining (801), the middle lining (802) and the outer lining (803) are all arranged on the bottom support; the stove core (7) include outer stove core (701) and inlayer stove core (702), wherein inlayer stove core (702) are filled inside outer stove core (701), inlayer stove core (702) central point puts and is equipped with air vent (703) that link up from top to bottom, wherein the cross section of outer stove core (701) and inlayer stove core (702) is square, be equipped with the expansion joint between outer stove core (701) and inlayer stove core (702), wherein the scope of expansion joint is 0.2~5 mm.

7. The square tungsten-molybdenum induction sintering furnace according to claim 6, wherein: the outer layer furnace core (701) is formed by stacking outer layer top layer bricks (704), outer layer upper layer bricks (705), outer layer middle layer bricks (706) and outer layer bottom layer bricks (707), wherein the plurality of layers of outer layer middle layer bricks (706) are stacked on the upper end surface of the outer layer bottom layer bricks (707), the outer layer upper layer bricks (705) are stacked on the uppermost end of the plurality of layers of outer layer middle layer bricks (706), and the outer layer top layer bricks (704) are stacked on the upper end surface of the outer layer upper layer bricks (705); the inner layer furnace core (702) is built by core bricks (708), wherein the core bricks (708) are in a cube or cuboid structure, the core bricks (708) are laid on the inner side of the outer layer furnace core (701), and the expansion gap between two adjacent core bricks (708) ranges from 0.2 mm to 5 mm.

8. The square tungsten-molybdenum induction sintering furnace according to claim 6, wherein: the inner lining (801), the middle lining (802) and the outer lining (803) are all built by shaped bricks (804), wherein the shaped bricks (804) of the inner lining (801) are made of heavy zirconia, the shaped bricks (804) made of the heavy zirconia play a role in high temperature resistance and heat insulation, the shaped bricks (804) of the middle lining (802) are made of zirconia hollow spheres, the shaped bricks (804) made of the zirconia hollow spheres play a role in heat preservation, and the shaped bricks (804) of the outer lining (803) are made of alumina hollow spheres, the shaped bricks (804) made of the alumina hollow spheres play a role in heat preservation and insulation; the inner lining (801) is built on the upper side edge of an upper layer base support (805) by a shaped brick (804), wherein the middle lining (802) is built on the upper side edge of a middle layer base support (806) by a shaped brick (804), wherein the outer lining (803) is built on the upper side edge of a lower layer base support (807) by a shaped brick (804), the top height of the outer lining (803) is larger than that of the inner lining (801) and the middle lining (802), wherein the top heights of the inner lining (801) and the middle lining (802) are the same, the thickness of the shaped brick (804) of the inner lining (801) is larger than that of the shaped brick (804) of the middle lining (802), and the thickness of the shaped brick (804) of the middle lining (802) is larger than that of the shaped brick (804) of the outer lining (803).