A composite production system for preparing niobium oxide or tantalum oxide by hydrometallurgical smelting of tantalum and niobium

Abstract

The present invention relates to the technical field of roasting equipment, specifically to a crucible, a heating room and a transmission system used in a high-temperature roasting environment, wherein a first handling robot carries a first crucible located at the front end of a first track to the rear end of a first second track; a first hydraulic cylinder pushes the first crucible located at the rear end of the first second track forward into the heating room, and the first crucible pushes multiple first crucibles located in the heating room and on the first second track forward in sequence through a first base, and the first second handling robot carries the first crucible located at the front end of the heating room out and places it at the rear end of the first third track, and the first rack teeth mesh with the first third gears; the present invention can avoid installing transmission elements made of metal materials in the heating room, improve work reliability, avoid frequent repairs and maintenance, reduce the cost of repairs and maintenance, reduce the time of repairs and maintenance, and improve production efficiency. The crucibles on the two transmission systems can use each other's waste heat for preheating, save energy, and reduce heat waste.

Description

Technical Field

[0001] The invention relates to the technical field of roasting equipment, in particular to a crucible, a heating room and a transmission system used in a high-temperature roasting environment. Background Art

[0002] The composite production equipment line for preparing niobium oxide or tantalum oxide by hydrometallurgical tantalum-niobium smelting includes a roasting step. The roasting step uses a tunnel-type heating room. The tunnel-type heating room includes two tunnels arranged along the front-to-back direction, namely a left tunnel and a right tunnel. The left tunnel is on the left side of the right tunnel. It also includes multiple first crucibles, multiple second crucibles and transmission equipment. The transmission equipment drives the first crucible to enter from the rear end of the left tunnel and come out from the front end. The transmission equipment drives the second crucible to enter from the front end of the right tunnel and come out from the rear end. The first crucible, the second crucible and the materials therein are subjected to high-temperature roasting in the tunnel-type heating room.

[0003] The current production equipment has such defects. First, the transmission equipment is set up in the high temperature environment of the tunnel heating room. The transmission equipment uses gears, shafts, ring chains, sprockets, etc., which inevitably have to be made of high-temperature resistant metal materials. Even high-temperature resistant metal materials cannot work normally for a long time at such high temperatures. They will become soft and deformed. Once they fail and cannot be used, they need to stop heating and cool to room temperature for maintenance. They need to be replaced frequently, and the cost of maintenance is very high, which reduces production efficiency. Materials that can withstand high temperatures, such as refractory tiles, are not high enough, hard, brittle, and fragile, and are not suitable for transmission parts. Summary of the invention

[0004] The present invention aims at the above-mentioned deficiencies in the prior art and provides a crucible, a heating room and a transmission system for use in a high-temperature roasting environment.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A crucible, a heating room and a transmission system used in a high-temperature roasting environment, comprising two transmission systems, a plurality of first crucibles, a plurality of second crucibles and a heating room, wherein the two transmission systems are a transmission system 1 and a transmission system 2;

[0007] The transmission system 1 includes a first track, a first second track, a first third track, a first gear, a first third gear, a first hydraulic cylinder, a first handling robot and a first second handling robot;

[0008] The first crucible comprises a first base and a first loading space, the first base is provided with a first sliding surface, the first sliding surface rests on the first track, the first second track or the first third track, and the first crucible slides along the first track, the first second track or the first third track;

[0009] A first rack tooth is provided at the bottom of the first base, a first gear is provided on the first track, the first gear is connected to the first track through a rotating pair, the first gear is meshed with the first rack tooth, the first gear is connected to other driving devices, and other driving devices drive the first gear to rotate, and the first gear drives the first crucible to translate from back to front through the first rack tooth. When the first rack tooth and a first gear behind are about to be out of meshing state, the first rack tooth and a first gear in front are just in meshing state, that is, at least one first gear is kept meshing with the first rack tooth, and the first crucible can continuously translate forward along the first track;

[0010] A first three gear is arranged on the first three tracks, the first three gear is connected to the first three tracks through a rotating pair, the first three gear is meshed with the first rack teeth, the first three gear is connected to other driving devices, the other driving devices drive the first three gears to rotate, the first three gears drive the first crucible to translate from back to front through the first rack teeth, when the first rack teeth are about to be out of meshing state with a first three gear at the rear, the first rack teeth just enter into a meshing state with a first three gear at the front, that is, at least one of the first three gears is kept meshed with the first rack teeth, and the first crucible can continuously translate forward along the first three tracks;

[0011] The first track is arranged along the front-to-back direction; the front end of the first track is located on the left side of the rear end of the first second track; the first transport robot transports the first crucible located at the front end of the first track to the rear end of the first second track;

[0012] The rear end of the first three tracks is connected to the front end of the first two tracks; the middle of the first two tracks passes through the heating room, the first hydraulic cylinder pushes the first base of the first crucible, the first hydraulic cylinder pushes the first crucible located at the rear end of the first two tracks forward into the heating room, and the first crucible pushes multiple first crucibles located in the heating room and on the first two tracks forward in sequence through the first base, that is, the first crucible is pushed by a first crucible adjacent to the back, and at the same time pushes a first crucible adjacent to the front; the first two handling robots carry out the first crucible located in the front of the heating room and put it on the rear end of the first three tracks, and the first rack teeth are meshed with the first three gears; the manipulators of the first two handling robots can be made of high-temperature resistant metal materials, but do not need to be in a high-temperature environment for a long time, and can be in a cold environment outside the heating room after taking and placing;

[0013] The transmission system 2 also includes a second-first track, a second-second track, a second-third track, a second-first gear, a second-third gear, a second hydraulic cylinder, a second-first handling robot and a second-second handling robot;

[0014] The second crucible comprises a second base and a second loading space, the second base is provided with a second sliding surface, the second sliding surface rests on the second first track, the second second track or the second third track, and the second crucible slides along the second first track, the second second track or the second third track;

[0015] A second rack tooth is provided at the bottom of the second base, a second gear is provided on the second track, the second gear is connected to the second track through a rotating pair, the second gear is meshed with the second rack tooth, the second gear is connected to other driving devices, and the other driving devices drive the second gear to rotate, and the second gear drives the second crucible to translate from front to back through the second rack tooth. When the second rack tooth and the front second gear are about to be out of meshing state, the second rack tooth and the rear second gear are just in meshing state, that is, at least one of the second gears is kept meshed with the second rack tooth, and the second crucible can continuously translate backward along the second track;

[0016] A second third gear is arranged on the second third track, the second third gear is connected to the second third track through a rotating pair, the second third gear is meshed with the second rack teeth, the second third gear is connected to other driving devices, the other driving devices drive the second third gear to rotate, the second third gear drives the second crucible to translate from front to rear through the second rack teeth, when the second rack teeth are about to be out of meshing with a front second third gear, the second rack teeth just enter into a meshing state with a rear second third gear, that is, at least one of the second third gears is kept meshed with the second rack teeth, and the second crucible can continuously translate backward along the second third track;

[0017] The second-first track is arranged along the front-to-back direction, and the second crucible located at the front end of the second-first track overlaps with the discharge port of the second crusher; the rear end of the second-first track is located on the right side of the front end of the second-second track; the second-first transport robot transports the second crucible located at the rear end of the second-first track to the front end of the second-second track;

[0018] The front end of the second-third track is connected to the rear end of the second-second track; the middle of the second-second track passes through the heating room, the second hydraulic cylinder pushes the second base of the second crucible, the second hydraulic cylinder pushes the second crucible located at the front end of the second-second track backward into the heating room, and the second crucible pushes multiple second crucibles located in the heating room and on the second-second track backward in sequence through the second base; the second-second handling robot carries out the last second crucible located in the heating room and places it at the front end of the second-third track, and the second rack teeth are meshed with the second-third gear;

[0019] The first second track is located on the left side of the second second track.

[0020] The internal space of the heating room described above is divided into three areas, which are the first buffer zone, the high-temperature roasting zone and the second buffer zone from back to front. The first track passes through the first buffer zone, the high-temperature roasting zone and the second buffer zone from back to front, and the second track passes through the second buffer zone, the high-temperature roasting zone and the first buffer zone from front to back. The second crucible located in the first buffer zone and the material therein release heat, and the temperature decreases. The first crucible located in the first buffer zone and the material therein absorb heat, and the temperature increases, and the two perform heat exchange. The high-temperature roasting zone is provided with a heating device, and the material in the first crucible and the material in the second crucible are heated. The materials on the surface undergo a decomposition reaction when heated and are converted into a mixture of tantalum oxide, niobium oxide and some impurities; the first crucible located in the second buffer zone and the materials therein release heat and the temperature decreases, while the second crucible located in the second buffer zone and the materials therein absorb heat and the temperature increases, and the two perform heat exchange; in this way, the heat released by the crucible coming out of the high-temperature roasting zone and the materials therein is just absorbed by the crucible to be entered into the high-temperature roasting zone and the materials therein, and the waste heat is transferred to each other, which can save a lot of energy; it can also prevent the first crucible or the second crucible from suddenly heating up when entering the high-temperature roasting zone from a low temperature, prevent it from bursting, and avoid shutdown for maintenance.

[0021] An automatic door can be provided at the entrance and exit of the track of the heating room. The automatic door opens automatically when entering or exiting the first crucible or the second crucible, and closes automatically when not entering or exiting the first crucible or the second crucible to prevent the air inside and outside from flowing to each other.

[0022] The middle of the first and second tracks mentioned above passes through the heating room. The first and second tracks are not horizontal, but the front end is low and the rear end is high. The angle between the first and second tracks and the horizontal plane is 5 degrees. The first crucible placed on the first and second tracks will produce a self-locking phenomenon due to the existence of friction. The first crucible will not automatically slide forward. When the first hydraulic cylinder pushes multiple first crucibles forward, the last first crucible will be subjected to a large thrust, the magnitude of which is equal to the sum of all the friction forces of the first crucibles in this row. If the first crucible exceeds its bearing limit, it will be crushed. If the friction force is reduced, the force on the last first crucible can be reduced to prevent it from being squeezed and damaged, thereby avoiding shutdown for maintenance.

[0023] Similarly, the middle of the second track passes through the heating room. The second track is not horizontal, but has a low rear end and a high front end. The angle between the second track and the horizontal plane is 5 degrees, and its working principle is the same as described above.

[0024] A first blower is arranged on the right wall of the first buffer zone described above, and a first air outlet is arranged on the left wall, and the height of the first blower is lower than that of the first air outlet. The first blower blows air to the lower second crucible, and after absorbing heat, the air flows to the first crucible and is then discharged from the first air outlet. The air path flows in one direction, which is beneficial to heat transfer.

[0025] Similarly, a second blower is arranged on the left wall of the second buffer zone, and a second air outlet is arranged on the right wall, and the height of the second blower is lower than that of the second air outlet. The second blower blows air to the lower first crucible, and after absorbing heat, the air flows to the second crucible and is then discharged from the second air outlet. The air path flows in one direction, which is conducive to heat transfer.

[0026] The first crucible or the second crucible mentioned above is made of silicon carbide, because silicon carbide has a very high melting point, the strength of silicon carbide increases with the increase of temperature, and the chemical properties are stable. The preferred variety is silicon carbide ceramic, which has a melting point of 2700°C and an apparent density of about 3.2g / cm3.

[0027] The first second track or the second second track mentioned above is made of Cr20Ni80 or silicon carbide, and the crucible of silicon carbide slides frictionally on the track of Cr20Ni80 or silicon carbide. The sliding system is small and has self-lubricating properties.

[0028] The beneficial effects of the present invention are as follows: in the heating room, a first hydraulic cylinder is used to push a row of first crucibles to move along the first and second tracks, which can avoid installing transmission components made of metal materials in the heating room, avoid fluorine corrosion of metal materials, ensure product quality, improve work reliability, avoid frequent repairs and maintenance, reduce repair and maintenance costs, reduce repair and maintenance time, improve production efficiency, and increase equipment life. The crucibles on the two transmission systems can use each other's waste heat for preheating, save energy, and reduce heat waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional structural schematic diagram of the relative position relationship of the transmission system 1, the transmission system 2, the heating room 3, the first crucible 4 and the second crucible 5, and the heating room 3 is not cut open;

[0030] Figure 2 It is a three-dimensional structural schematic diagram of the relative position relationship of the transmission system 1, the transmission system 2, the heating room 3, the first crucible 4 and the second crucible 5, and the heating room 3 is partially cut away;

[0031] Figure 3 3D schematic diagram of the relative position relationship between the transmission system 1 and the first crucible 4;

[0032] Figure 4 It is a schematic diagram of the three-dimensional structure of a partially cut-away portion of the heating room 3;

[0033] Figure 5 3D schematic diagram of the first crucible 4.

[0034] In the figure:

[0035] 1-transmission system 1; 11-first track; 12-first track 2; 13-first track 3; 14-first gear 1; 15-first gear 3; 16-first hydraulic cylinder;

[0036] 2-transmission system 2; 21-second track; 22-second track; 23-second track; 24-second gear; 25-second gear; 26-second hydraulic cylinder;

[0037] 3-heating room; 31-first buffer zone; 311-first blower; 312-first air outlet; 32-high temperature roasting zone; 33-second buffer zone; 331-second blower; 332-second air outlet;

[0038] 4-first crucible; 41-first base; 42-first rack tooth; 43-first clamping hole; 44-first sliding surface;

[0039] 5- Second crucible. DETAILED DESCRIPTION

[0040] The technical solutions in the present invention are described clearly and completely below in combination with the embodiments and drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] A crucible, a heating room and a transmission system used in a high temperature roasting environment, such as Figure 1-5 The method comprises two transmission systems, a plurality of first crucibles 4, a plurality of second crucibles 5 and a heating room 3, wherein the two transmission systems are transmission system 1 and transmission system 2;

[0042] The transmission system 1 includes a first track 11, a first second track 12, a first third track 13, a first gear 14, a first third gear 15, a first hydraulic cylinder 16, a first transport robot and a first second transport robot;

[0043] The first crucible 4 includes a first base 41 and a first loading space. The first base 41 is provided with a first sliding surface 44. The first sliding surface 44 leans against the first track 11, the first track 12 or the first track 13. The first crucible 4 slides along the first track 11, the first track 12 or the first track 13.

[0044] A first rack tooth 42 is provided at the bottom of the first base 41, and a first gear 14 is provided on the first track 11. The first gear 14 is connected to the first track 11 through a rotating pair, and the first gear 14 is meshed with the first rack tooth 42. The first gear 14 is connected to other driving devices, and other driving devices drive the first gear 14 to rotate. The first gear 14 drives the first crucible 4 to translate from the back to the front through the first rack tooth 42. When the first rack tooth 42 is about to be out of meshing with a first gear 14 at the rear, the first rack tooth 42 just enters into a meshing state with a first gear 14 at the front, that is, at least one first gear 14 is kept meshed with the first rack tooth 42, and the first crucible 4 can continuously translate forward along the first track 11;

[0045] A first three gear 15 is arranged on the first three tracks 13, the first three gear 15 is connected to the first three tracks 13 through a rotating pair, the first three gear 15 is meshed with the first rack teeth 42, the first three gear 15 is connected to other driving devices, and the other driving devices drive the first three gears 15 to rotate, the first three gears 15 drive the first crucible 4 to translate from the back to the front through the first rack teeth 42, when the first rack teeth 42 and a first three gear 15 behind are about to be out of meshing state, the first rack teeth 42 and a first three gear 15 in front are just in meshing state, that is, at least one of the first three gears 15 is kept meshing with the first rack teeth 42, and the first crucible 4 can continuously translate forward along the first three tracks 13;

[0046] The first track 11 is arranged along the front-to-back direction; the front end of the first track 11 is located on the left side of the rear end of the first second track 12; the first transport robot transports the first crucible 4 located at the front end of the first track 11 to the rear end of the first second track 12;

[0047] The rear end of the first-third track 13 is connected to the front end of the first-second track 12; the middle of the first-second track 12 passes through the heating room 3, and the first hydraulic cylinder 16 pushes the first base 41 of the first crucible 4. The first hydraulic cylinder 16 pushes the first crucible 4 located at the rear end of the first-second track 12 forward into the heating room 3. The first crucible 4 pushes multiple first crucibles 4 located in the heating room 3 and on the first-second track 12 forward in sequence through the first base 41, that is, the first crucible 4 is pushed by a first crucible 4 adjacent to the rear, and at the same time pushes a first crucible 4 adjacent to the front; the first-second handling robot carries out the frontmost first crucible 4 in the heating room 3 and puts it at the rear end of the first-third track 13, and the first rack tooth 42 is meshed with the first-third gear 15; the manipulator of the first-second handling robot can be made of high-temperature resistant metal material, but it does not need to be in a high-temperature environment for a long time, and can be in a cold environment outside the heating room 3 after taking and placing;

[0048] The transmission system 2 further includes a second-first track 21, a second-second track 22, a second-third track 23, a second-first gear 24, a second-third gear 25, a second hydraulic cylinder 26, a second-first handling robot and a second-second handling robot;

[0049] The second crucible 5 comprises a second base and a second loading space, the second base is provided with a second sliding surface, the second sliding surface rests on the second first track 21, the second second track 22 or the second third track 23, and the second crucible 5 slides along the second first track 21, the second second track 22 or the second third track 23;

[0050] A second rack tooth is provided at the bottom of the second base, a second gear 24 is provided on the second track 21, the second gear 24 is connected to the second track 21 through a rotating pair, the second gear 24 is meshed with the second rack tooth, the second gear 24 is connected to other driving devices, and the other driving devices drive the second gear 24 to rotate, and the second gear 24 drives the second crucible 5 to translate from front to back through the second rack tooth. When the second rack tooth and the front second gear 24 are about to be out of meshing state, the second rack tooth and the rear second gear 24 just enter into a meshing state, that is, at least one second gear 24 is kept meshed with the second rack tooth, and the second crucible 5 can continuously translate backward along the second track 21;

[0051] A second third gear 25 is provided on the second third track 23, the second third gear 25 is connected to the second third track 23 through a rotating pair, the second third gear 25 is meshed with the second rack teeth 42, the second third gear 25 is connected to other driving devices, and the other driving devices drive the second third gear 25 to rotate, and the second third gear 25 drives the second crucible 5 to translate from front to rear through the second rack teeth. When the second rack teeth are about to be out of meshing with a front second third gear 25, the second rack teeth just enter into a meshing state with a rear second third gear 25, that is, at least one second third gear 25 is kept meshing with the second rack teeth, and the second crucible 5 can continuously translate backward along the second third track 23;

[0052] The second-first track 21 is arranged along the front-to-back direction, and the second crucible 5 located at the front end of the second-first track 21 overlaps with the discharge port of the second crusher; the rear end of the second-first track 21 is located on the right side of the front end of the second-second track 22; the second-first transport robot transports the second crucible 5 located at the rear end of the second-first track 21 to the front end of the second-second track 22;

[0053] The front end of the second-third track 23 is connected to the rear end of the second-second track 22; the middle of the second-second track 22 passes through the heating room 3, the second hydraulic cylinder 26 pushes the second base of the second crucible 5, and the second hydraulic cylinder 26 pushes the second crucible 5 located at the front end of the second-second track 22 backward into the heating room 3, and the second crucible 5 pushes the multiple second crucibles 5 located in the heating room 3 and on the second-second track 22 backward in sequence through the second base; the second-second handling robot carries out the last second crucible 5 located in the heating room 3 and places it at the front end of the second-third track 23, and the second rack teeth 42 are meshed with the second-third gear 25;

[0054] The first second track 12 is located on the left side of the second second track 22 .

[0055] The internal space of the heating room 3 described above is divided into three areas, which are the first buffer zone 31, the high temperature roasting zone 32 and the second buffer zone 33 from back to front. The first track 12 passes through the first buffer zone 31, the high temperature roasting zone 32 and the second buffer zone 33 from back to front, and the second track 22 passes through the second buffer zone 33, the high temperature roasting zone 32 and the first buffer zone 31 from front to back. The second crucible 5 located in the first buffer zone 31 and the material therein release heat and the temperature decreases, and the first crucible 4 located in the first buffer zone 31 and the material therein absorb heat and the temperature increases, and the two perform heat exchange; the high temperature roasting zone 32 is provided with a heating device, and the first crucible 5 ... The materials in the first crucible 4 and the materials in the second crucible 5 undergo a decomposition reaction when heated and are converted into a mixture of tantalum oxide, niobium oxide and some impurities; the first crucible 4 and the materials in the second buffer zone 33 release heat and the temperature decreases, and the second crucible 5 and the materials in the second buffer zone 33 absorb heat and the temperature increases, and the two perform heat exchange; in this way, the heat released by the crucible coming out of the high-temperature roasting zone 32 and the materials in the crucible are just absorbed by the crucible and the materials in the crucible to be entered into the high-temperature roasting zone 32, and the waste heat is transferred to each other, which can save a lot of energy; it can also prevent the first crucible 4 or the second crucible 5 from suddenly heating up when entering the high-temperature roasting zone 32 from a low temperature, and prevent it from bursting.

[0056] The heating room 3 may be provided with an automatic door at the entrance and exit of the track, which automatically opens when entering or exiting the first crucible 4 or the second crucible 5, and automatically closes when not entering or exiting the first crucible 4 or the second crucible 5 to prevent the air inside and outside from flowing to each other.

[0057] The middle of the first and second tracks 12 mentioned above passes through the heating room 3. The first and second tracks 12 are not horizontal, but the front end is low and the rear end is high. The angle between the first and second tracks 12 and the horizontal plane is 5 degrees. The first crucible 4 placed on the first and second tracks 12 will produce a self-locking phenomenon due to the existence of friction. The first crucible 4 will not automatically slide forward. When the first hydraulic cylinder 16 pushes multiple first crucibles 4 forward, the last first crucible 4 will be subjected to a large thrust, the magnitude of which is equal to the sum of all the friction forces of this row of first crucibles 4. If the first crucible 4 exceeds its bearing limit, it will be crushed. If the friction force is reduced, the force on the last first crucible 4 can be reduced to prevent it from being squeezed.

[0058] Similarly, the middle of the second track 22 passes through the heating room 3. The second track 22 is not horizontal, but has a lower rear end and a higher front end. The angle between the second track 22 and the horizontal plane is 5 degrees, and its working principle is the same as described above.

[0059] A first blower 311 is arranged on the right wall of the first buffer zone 31 described above, and a first air outlet 312 is arranged on the left wall, and the height of the first blower 311 is lower than the height of the first air outlet 312. The first blower 311 blows wind to the lower second crucible 5, which absorbs heat and then flows to the first crucible 4, and then is discharged from the first air outlet 312. The wind path flows in one direction, which is conducive to heat transfer.

[0060] Similarly, a second blower 331 is provided on the left wall of the second buffer zone 33, and a second air outlet 332 is provided on the right wall, and the height of the second blower 331 is lower than the height of the second air outlet 332. The second blower 331 blows wind to the lower first crucible 4, which absorbs heat and then flows to the second crucible 5, and then is discharged from the second air outlet 332. The wind path flows in one direction, which is conducive to heat transfer.

[0061] The first crucible 4 or the second crucible 5 mentioned above is made of silicon carbide, because silicon carbide has a very high melting point, the strength of silicon carbide increases with the increase of temperature, and the chemical property is stable.

[0062] The first second track 12 or the second second track 22 described above is made of Cr20Ni80 or silicon carbide. The preferred silicon carbide crucible slides on the track of Cr20Ni80 or silicon carbide, has a small friction coefficient, and has self-lubricating properties.

[0063] In the heating room 3, the first hydraulic cylinder 16 is used to push a row of first crucibles 4 to move along the first and second tracks 12, which can avoid installing transmission components made of metal materials in the heating room 3, improve work reliability, avoid frequent repairs and maintenance, reduce repair and maintenance costs, reduce repair and maintenance time, and improve production efficiency. The crucibles on the two transmission systems can use each other's waste heat for preheating, save energy, and reduce heat waste.

[0064] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A composite production system for preparing niobium oxide or tantalum oxide by hydrometallurgical smelting of tantalum and niobium, comprising two transmission systems, a plurality of first crucibles, a plurality of second crucibles and a heating room, wherein the two transmission systems are transmission system 1 and transmission system 2; The transmission system 1 includes a first track, a first second track, a first third track, a first gear, a first third gear, a first hydraulic cylinder, a first handling robot and a first second handling robot; The first crucible comprises a first base and a first loading space, the first base is provided with a first sliding surface, the first sliding surface rests on the first track, the first second track or the first third track, and the first crucible slides along the first track, the first second track or the first third track; A first rack tooth is provided at the bottom of the first base, a first gear is provided on the first track, the first gear is connected to the first track through a rotating pair, the first gear is meshed with the first rack tooth, the first gear drives the first crucible to translate from back to front through the first rack tooth, and when the first rack tooth is out of meshing state with a first gear at the rear, the first rack tooth is in meshing state with a first gear at the front; A first third gear is arranged on the first third track, the first third gear is connected to the first third track through a rotating pair, the first third gear is meshed with the first rack teeth, the first third gear drives the first crucible to translate from back to front through the first rack teeth, when the first rack teeth are out of meshing state with a first third gear at the rear, the first rack teeth are in meshing state with a first third gear at the front; The first track is arranged along the front-to-back direction; the front end of the first track is located on the left side of the rear end of the first second track; the first transport robot transports the first crucible located at the front end of the first track to the rear end of the first second track; The rear end of the first three tracks is connected to the front end of the first two tracks; the middle of the first two tracks passes through the heating room, the first hydraulic cylinder pushes the first base of the first crucible, the first hydraulic cylinder pushes the first crucible located at the rear end of the first two tracks forward into the heating room, the first crucible pushes multiple first crucibles located in the heating room and on the first two tracks forward in sequence through the first base; the first two transport robots transport the first crucible located in the front of the heating room out and place it at the rear end of the first three tracks, the first rack teeth mesh with the first three gears; The transmission system 2 also includes a second-first track, a second-second track, a second-third track, a second-first gear, a second-third gear, a second hydraulic cylinder, a second-first handling robot and a second-second handling robot; The second crucible comprises a second base and a second loading space, the second base is provided with a second sliding surface, the second sliding surface rests on the second first track, the second second track or the second third track, and the second crucible slides along the second first track, the second second track or the second third track; A second rack is provided at the bottom of the second base, a second gear is provided on the second track, the second gear is connected to the second track through a rotating pair, the second gear is meshed with the second rack, the second gear drives the second crucible to translate from front to back through the second rack, and when the second rack is out of mesh with the front second gear, the second rack is meshed with the rear second gear; A second third gear is arranged on the second third track, the second third gear is connected to the second third track through a rotating pair, the second third gear is meshed with the second rack teeth, the second third gear drives the second crucible to translate from front to back through the second rack teeth, when the second rack teeth are out of meshing state with a front second third gear, the second rack teeth are in meshing state with a rear second third gear; The second track is arranged along the front-to-back direction; the rear end of the second track is located on the right side of the front end of the second track; the second transport robot transports the second crucible located at the rear end of the second track to the front end of the second track; The front end of the second-third track is connected to the rear end of the second-second track; the middle of the second-second track passes through the heating room, the second hydraulic cylinder pushes the second base of the second crucible, the second hydraulic cylinder pushes the second crucible located at the front end of the second-second track backward into the heating room, and the second crucible pushes multiple second crucibles located in the heating room and on the second-second track backward in sequence through the second base; the second-second handling robot carries out the last second crucible located in the heating room and places it at the front end of the second-third track, and the second rack teeth are meshed with the second-third gear; The first second track is located on the left side of the second second track.

2. A composite production system for preparing niobium oxide or tantalum oxide by hydrometallurgical smelting of tantalum and niobium as claimed in claim 1, characterized in that The internal space of the heating room is divided into three areas, which are the first buffer zone, the high-temperature roasting zone and the second buffer zone from back to front. The first track passes through the first buffer zone, the high-temperature roasting zone and the second buffer zone from back to front, and the second track passes through the second buffer zone, the high-temperature roasting zone and the first buffer zone from front to back; a heating device is provided in the high-temperature roasting zone.

3. A composite production system for preparing niobium oxide or tantalum oxide by hydrometallurgical smelting of tantalum and niobium as claimed in claim 1 or 2, characterized in that The front ends of the first and second tracks are low and the rear ends are high, and the angles between the first and second tracks and the horizontal plane are 0 to 5 degrees.

4. A composite production system for preparing niobium oxide or tantalum oxide by hydrometallurgical smelting of tantalum and niobium as claimed in claim 1 or 2, characterized in that The rear end of the second track is low and the front end is high, and the angle between the second track and the horizontal plane is 0 to 5 degrees.

5. A composite production system for preparing niobium oxide or tantalum oxide by hydrometallurgical smelting of tantalum and niobium as claimed in claim 2, characterized in that A first blower is arranged on the right wall of the first buffer zone, and a first air outlet is arranged on the left wall. The height of the first blower is lower than that of the first air outlet.

6. A composite production system for preparing niobium oxide or tantalum oxide by hydrometallurgical smelting of tantalum and niobium as claimed in claim 2, characterized in that A second blower is arranged on the left wall of the second buffer zone, and a second air outlet is arranged on the right wall. The height of the second blower is lower than that of the second air outlet.

7. A composite production system for preparing niobium oxide or tantalum oxide by hydrometallurgical smelting of tantalum and niobium as claimed in claim 1, 2, 5 or 6, characterized in that The first crucible or the second crucible is made of silicon carbide.

8. A composite production system for preparing niobium oxide or tantalum oxide by hydrometallurgical smelting of tantalum and niobium as claimed in claim 7, characterized in that The silicon carbide mentioned refers to silicon carbide ceramics.

9. A composite production system for preparing niobium oxide or tantalum oxide by hydrometallurgical smelting of tantalum and niobium as claimed in claim 2, characterized in that The heating room is provided with an automatic opening and closing door at the entrance and exit of the track.

10. A composite production system for preparing niobium oxide or tantalum oxide by hydrometallurgical smelting of tantalum and niobium as claimed in claim 1 or 2 or 5 or 6 or 8 or 9, characterized in that The manufacturing material of the first second track or the second second track is Cr20Ni80 or silicon carbide.

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