Material suction device for producing biomass hard carbon negative electrode material

Abstract

The utility model provides a material suction device for producing a biomass hard carbon negative electrode material. The material suction device comprises a furnace body, a sealing cover mechanism, an air exhaust mechanism, a lifting mechanism and a cleaning mechanism, the sealing cover mechanism is slidably arranged at the top of the furnace body, and a vacuum cavity is formed when the sealing cover mechanism and the furnace body are closed; the air exhaust mechanism is arranged on the side wall of the furnace body and communicates with the vacuum cavity, a one-way door is arranged in the air exhaust mechanism, the one-way door is opened when the air exhaust mechanism operates, the vacuum cavity is vacuumized by the air exhaust mechanism, and the one-way door is closed after the air exhaust mechanism completes operation; the lifting mechanism is arranged on the outer wall of the furnace body and drives the sealing cover mechanism to move up and down; the cleaning mechanism is arranged at the bottom of the furnace body, the cleaning mechanism is used for cleaning residues and impurities at the bottom of the furnace body, the cleaning mechanism comprises a residue basket, and the residue basket is hooked below the sealing cover mechanism and moves up and down along with the sealing cover mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field related to vacuum adsorption devices, in particular to a material adsorption device for producing biomass hard carbon negative electrode materials. Background Art

[0002] In the manufacturing process of lithium-ion batteries, the control of impurities such as moisture and harmful gases is very critical. If the impurity content in the negative electrode material is too high, it will react chemically with the electrolyte, thereby corroding the metal parts inside the battery, the battery shell and the seal, causing the battery to break, leak and other problems. Therefore, it is necessary to use equipment such as vacuum suction devices to absorb harmful gases and impurities such as moisture in the negative electrode material, thereby improving the quality and stability of the negative electrode material.

[0003] A Chinese utility model with application number CN202321742708.5 discloses a vacuum suction device for negative electrode material production, comprising a shell, a storage table is arranged at the middle position of the lower end of the inner side of the inner tank, a slag basket is embedded in the depression of the inner tank, the slag basket can slide up and down in the inner tank, and the slag basket can be taken out of the inner tank. After the vacuum suction device completes the adsorption of the negative electrode material, the negative electrode material is taken out of the inner tank, and then the motor is started to drive the rotating rod and the scraper to scrape on the storage table. After all the impurities and dirt on the storage table are pushed into the slag basket, the slag basket can be lifted out of the inner tank by holding the handle upward, and the slag basket can be cleaned separately.

[0004] However, the inventors found that the equipment has the following problems: 1. When the vacuum machine is running, the friction between the metal vane and the inner wall of the metal pump chamber causes local overheating, which leads to thermal decomposition of the lubricating grease and produces oil vapor. When the vacuum machine stops running, the return oil enters the vacuum chamber and causes pollution; 2. Because the slag basket needs to be close to the inner liner to prevent it from remaining in the inner liner, it will be subject to greater friction when manually lifting the slag basket, which is laborious and inconvenient. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies in the prior art and to provide a suction device for the production of biomass hard carbon negative electrode materials. A one-way door is provided to prevent oil return from a mechanical pump. A lifting mechanism is provided to drive the sealing cover and the slag basket to automatically rise and fall, making it convenient for manual cleaning and taking and placing the slag basket.

[0006] To solve the above technical problems, the technical solution adopted by the present utility model is as follows: A material suction device for producing a biomass hard carbon negative electrode material, comprising: a furnace body, a sealing cover mechanism, a gas extraction mechanism, a lifting mechanism, and a cleaning mechanism; two groups of guide rods are respectively arranged on the outer walls on both sides of the furnace body; the sealing cover mechanism is slidably arranged on the top of the furnace body, and a vacuum chamber is formed when the sealing cover mechanism is closed with the furnace body; the gas extraction mechanism is arranged on the side wall of the furnace body, the gas extraction mechanism communicates with the vacuum chamber, a one-way door is arranged in the gas extraction mechanism, the one-way door opens when the gas extraction mechanism operates, the gas extraction mechanism evacuates the vacuum chamber, and the one-way door closes after the operation of the gas extraction mechanism is completed; the lifting mechanism is arranged on the outer wall of the furnace body, and the lifting mechanism drives the sealing cover mechanism to move up and down; the cleaning mechanism is arranged at the bottom of the furnace body, and the cleaning mechanism cleans the residues and impurities at the bottom of the furnace body. The cleaning mechanism includes a slag basket, and the slag basket is hooked under the sealing cover mechanism and moves up and down with the sealing cover mechanism.

[0007] As a preference, a control panel and indicator lights are arranged on the outer wall of the furnace body, and a pair of latches are arranged on the top of the furnace body.

[0008] As a preference, the sealing cover mechanism includes a sealing cover, a hook, a pressure relief valve, and a connecting arm; the sealing cover is arranged on the top of the furnace body; the hook is rotatably installed on the lower end surface of the sealing cover, a hook groove is opened under the hook, and two groups of hooks are arranged, and the two groups of hooks are respectively arranged on both sides of the lower end surface of the sealing cover; the pressure relief valve is arranged through the center of the sealing cover; one end of the connecting arm is fixed to the sealing cover, and the other end is correspondingly sleeved on the telescopic guide rod.

[0009] As a preference, when the hook rotates to be horizontal and fits with the lower end surface of the sealing cover, a magnetic block is embedded at the joint between the lower part of the sealing cover and the hook.

[0010] As a preference, limiting columns adapted to the hook grooves are arranged on both sides of the slag basket, and the limiting columns are correspondingly suspended at the hook grooves.

[0011] As a preference, handles are further arranged on both sides of the slag basket, and the handles do not fit with the inner wall of the furnace body.

[0012] As a preference, the gas extraction mechanism further includes a mechanical pump, an air pipe, and a filter screen; the mechanical pump is arranged outside the furnace body; the air pipe communicates the mechanical pump and the furnace body; the filter screen is arranged at the connection position between the air pipe and the vacuum chamber.

[0013] As a preference, the lifting mechanism includes a cylinder and a connecting rod; the cylinder is fixedly arranged in the middle of the outer wall on one side of the furnace body; one end of the connecting rod is fixedly connected to the top of the piston of the cylinder, and the other end is fixedly connected to the seal cover mechanism.

[0014] As a preference, the cleaning mechanism further includes a workbench, a driving member, and a scraping rod; the workbench is arranged at the center of the bottom of the vacuum chamber, and the workbench is frustum-shaped; the driving member is arranged below the workbench, and the rotating shaft of the driving member penetrates the workbench; the scraping rod is rotatably arranged on the upper end surface of the workbench under the drive of the driving member.

[0015] As a preference, the horizontal height of the workbench is higher than the bottom of the furnace body; the outer wall of the slag basket is rectangularly fitted to the bottom of the furnace body, the middle part of the slag basket is cylindrically sleeved on the workbench, the upper end surface of the sleeved part of the slag basket is inclined, and the highest point of the inclined part is lower than the horizontal height of the workbench.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. By arranging a one-way door in the air pipe, after the mechanical pump finishes running, the one-way door closes, isolating the mechanical pump from the vacuum chamber, preventing oil vapor from returning to the vacuum chamber and causing pollution, reducing the pollution rate of the vacuum chamber, improving the cleanliness of the vacuum chamber, and ensuring the quality of the product;

[0018] 2. By arranging a lifting mechanism to drive the seal cover and the slag basket to automatically lift, it is convenient for manual cleaning, taking and placing the slag basket, and improves work efficiency;

[0019] 3. Hooks that can be rotatably attached to the seal cover are provided. After the slag basket is taken out of the furnace body, it can be magnetically attached to the seal cover, facilitating the subsequent taking and placing of the slag basket and convenient for the staff to operate;

[0020] 4. The upper end surface of the sleeved part of the slag basket is inclined, and the highest point of the inclined part is lower than the horizontal height of the workbench, facilitating the residues and impurities cleaned down to fall into the slag basket, reducing the residue residue amount in the vacuum chamber, and improving the cleaning efficiency.

[0021] In summary, the device has the advantages of high product quality, convenient operation, high cleaning efficiency, etc., and is particularly suitable for the technical field related to vacuum adsorption devices. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic structural diagram of a material suction device for the production of a biomass hard carbon negative electrode material;

[0024] Figure 2 It is a partial cross-sectional view of a material suction device for the production of a biomass hard carbon negative electrode material;

[0025] Figure 3 It is Figure 1 An enlarged view of part A in

[0026] Figure 4 It is a schematic structural diagram of a slag basket;

[0027] Figure 5 It is a schematic structural diagram of a sealing cover mechanism;

[0028] Figure 6 It is a schematic structural diagram of a material suction device for the production of a biomass hard carbon negative electrode material;

[0029] Figure 7 It is Figure 2 An enlarged view of part B in

[0030] Reference numerals in the drawings: 1. Furnace body; 11. Guide rod; 12. Vacuum chamber; 13. Control panel; 14. Indicator light; 15. Lock; 2. Sealing cover mechanism; 21. Sealing cover; 22. Hook; 221. Hook groove; 23. Pressure relief valve; 24. Connecting arm; 25. Magnetic block; 3. Air extraction mechanism; 31. Check valve; 311. Torsion spring; 32. Mechanical pump; 33. Air pipe; 34. Filter screen; 4. Lifting mechanism; 41. Cylinder; 42. Connecting rod; 5. Cleaning mechanism; 51. Slag basket; 511. Limit post; 512. Handle; 52. Workbench; 53. Driving part; 54. Scraping rod. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0034] Embodiment 1:

[0035] As Figures 1 to 7 shown, a material suction device for producing a biomass hard carbon negative electrode material includes: a furnace body 1, a sealing cover mechanism 2, an air extraction mechanism 3, a lifting mechanism 4, and a cleaning mechanism 5; two sets of telescopic guide rods 11 are respectively arranged on the outer walls on both sides of the furnace body 1; the sealing cover mechanism 2 is slidably arranged on the top of the furnace body 1, and a vacuum chamber 12 is formed when the sealing cover mechanism 2 and the furnace body 1 are closed; the air extraction mechanism 3 is arranged on the side wall of the furnace body 1, the air extraction mechanism 3 communicates with the vacuum chamber 12, a check door 31 is arranged in the air extraction mechanism 3, the check door 31 opens when the air extraction mechanism 3 operates, the air extraction mechanism 3 evacuates the vacuum chamber 12, and the check door 31 closes after the operation of the air extraction mechanism 3 is completed; the lifting mechanism 4 is arranged on the outer wall of the furnace body 1, and the lifting mechanism 4 drives the sealing cover mechanism 2 to move up and down; the cleaning mechanism 5 is arranged at the bottom of the furnace body 1, and the cleaning mechanism 5 cleans the residues and impurities at the bottom of the furnace body 1. The cleaning mechanism 5 includes a slag basket 51, and the slag basket 51 is hooked under the sealing cover mechanism 2 and moves up and down with the sealing cover mechanism 2.

[0036] It should be noted here that a torsion spring 311 is provided at the rotating connection of the check door 31 to assist in completing the closing action of the check door 31.

[0037] It should be further noted here that the structure of the check door 31 is used instead of the check valve because during the long-term use of the check valve, oil vapor will accumulate in the check valve, affecting the vacuum pumping effect and being not easy to clean, while the structure of the check door 31 is not affected by the accumulation of oil vapor.

[0038] It is worth mentioning here that by providing a one-way door 31 in the air duct 33, after the operation of the mechanical pump 32 is completed, the one-way door 31 closes, isolating the mechanical pump 32 from the vacuum chamber 12, preventing oil vapor from returning to the vacuum chamber 12 and causing pollution, and ensuring the quality of the product.

[0039] As Figure 2 、 6 shown, a control panel 13 and an indicator light 14 are provided on the outer wall of the furnace body 1, and a pair of latches 15 are provided at the top of the furnace body 1.

[0040] It should be noted that the furnace body is internally provided with an electric heating element, and the latch 15 is rotatably arranged on the upper part of the furnace body 1, and the opening and locking actions are completed by flipping the latch 15.

[0041] As Figure 1 、 2 、5 shown, the seal cover mechanism 2 includes a seal cover 21, a hook 22, a pressure relief valve 23, and a connecting arm 24; the seal cover 21 is arranged on the top of the furnace body 1; the hook 22 is rotatably installed on the lower end surface of the seal cover 21, a hook groove 221 is formed below the hook, two groups of the hooks 22 are provided, and the two groups of the hooks 22 are respectively arranged on both sides of the lower end surface of the seal cover 21; the pressure relief valve 23 is arranged through the center of the seal cover 21; one end of the connecting arm 24 is fixed on the seal cover 21, and the other end is correspondingly sleeved on the telescopic guide rod 11.

[0042] It is worth mentioning here that by providing the telescopic guide rod 11 sleeved with the connecting arm 24, it plays a role in supporting and stabilizing during the up and down movement of the seal cover 21.

[0043] As Figure 5 shown, the hook 22 rotates to be horizontal and fits with the lower end surface of the seal cover 21, and a magnetic attraction block 25 is embedded at the joint between the lower part of the seal cover 21 and the hook 22.

[0044] It is worth mentioning here that by providing the hook 22 that can rotate and fit with the seal cover 21, after the slag basket 51 is taken out of the furnace body, the hook 22 can be magnetically attracted and attached to the seal cover 21, which is convenient for the subsequent taking and placing of the slag basket 51.

[0045] As Figure 4 、 5 、6、7 shown, limiting columns 511 adapted to the hook grooves 221 are provided on both sides of the slag basket 51, and the limiting columns 511 are correspondingly suspended at the hook grooves 221.

[0046] It is worth mentioning here that by providing the limiting columns 511 adapted to the hook grooves 221, the slag basket 51 can be stably suspended below the hook 22.

[0047] As Figure 2 、 4 shown, grip handles 512 are further provided on both sides of the slag basket 51, and the grip handles 512 do not fit against the inner wall of the furnace body 1.

[0048] It is worth mentioning here that by providing the grip handles 512 that do not fit against the inner wall, it is convenient for the slag basket 51 to be manually taken out and put back after being lifted out of the furnace body 1 by the lifting mechanism 4.

[0049] As Figure 1 、 3 shown, the air extraction mechanism 3 further includes a mechanical pump 32, an air pipe 33, and a filter screen 34; the mechanical pump 32 is arranged outside the furnace body 1; the air pipe 33 connects the mechanical pump 32 and the furnace body 1; the filter screen 34 is arranged at the connection position between the air pipe 33 and the vacuum chamber 12.

[0050] It is worth mentioning here that by providing a filter screen at the connection position, it is possible to prevent impurities such as solid dust in the cavity from entering the air extraction mechanism 3 during the vacuum pumping process.

[0051] As Figure 1 、 2 、6 shown, the lifting mechanism 4 includes a cylinder 41 and a connecting rod 42; the cylinder 41 is fixedly arranged in the middle of the outer wall on one side of the furnace body 1; one end of the connecting rod 42 is fixedly connected to the top of the piston of the cylinder 41, and the other end is fixedly connected to the seal cover mechanism 2.

[0052] It should be noted here that the stroke of the cylinder 41 is L1, the length of the hook 22 is L2, and the height of the slag basket 51 is L3. There is a relationship of L1 > L2 > L3 among the three, which can ensure the convenient taking and placing of the slag basket 51 after being suspended and lifted out of the furnace body 1 without occupying too much installation space.

[0053] It is worth mentioning here that by providing the lifting mechanism 4 to drive the seal cover 21 and the slag basket 51 to automatically lift and lower, it is convenient for manual cleaning and taking and placing the slag basket.

[0054] As Figure 1 、 2 shown, the cleaning mechanism 5 further includes a workbench 52, a driving member 53, and a scraping rod 54; the workbench 52 is arranged at the center of the bottom of the vacuum chamber 12, and the workbench 52 is in a frustum shape; the driving member 53 is arranged below the workbench 52, and the rotating shaft of the driving member 53 penetrates the workbench 52; the scraping rod 54 is rotatably arranged on the upper end surface of the workbench 52 driven by the driving member 53.

[0055] It is worth mentioning here that by setting the scraping rod 54 on the workbench 52, the residue on the workbench 52 can be cleaned after the negative electrode material is adsorbed and taken out, and the residue is swept into the slag basket 51.

[0056] As Figure 1 , 2 , as shown in Figure 4, the horizontal height of the workbench 52 is higher than the bottom of the furnace body 1; the outer wall of the slag basket 51 is rectangular and fitted into the bottom of the furnace body 1, the middle part of the slag basket 51 is cylindrical and sleeved on the workbench 52, the upper end face of the sleeved part of the slag basket 51 is inclined, and the highest point of the inclined part is lower than the horizontal height of the workbench 52.

[0057] It is worth mentioning here that the slag basket 51 that fits with the furnace body 1 and the workbench 52 can better prevent dirt and impurities generated during vacuum adsorption from falling into the gaps. The upper end face of the sleeved part of the slag basket is inclined, and the highest point of the inclined part is lower than the horizontal height of the workbench 52, which is convenient for the cleaned residue and impurities to fall into the slag basket, improving the cleaning efficiency.

[0058] The working process is as follows:

[0059] Open the lock catch 15. After the lifting mechanism 4 drives the sealing cover 21 to rise to a sufficient height, place the prepared negative electrode material raw materials and additives on the workbench 52. The lifting mechanism 4 drives the sealing cover 21 to descend to seal the furnace body 1, lock the lock catch 15, open the air extraction mechanism 3, start the mechanical pump 32, the one-way door 31 opens under the action of air pressure, the vacuum chamber 12 is evacuated, and at the same time, impurities such as moisture and harmful gases are also extracted by the air extraction mechanism 3. Close the air extraction mechanism 3, and the one-way door 31 closes under the action of the torsion spring 311 and air pressure. The electric heating element in the furnace body heats the negative electrode material raw materials. After the heating work is completed, wait for the negative electrode material to be insulated and then cooled. After cooling, take out the prepared negative electrode material, start the cleaning mechanism 5, the scraping rod 54 sweeps the residue remaining on the workbench 52 into the slag basket 51, start the lifting mechanism 4 to open the sealing cover 21 and take out the slag basket. Manually hold the handle 512 and rotate to retract the hook 22 to take out the slag basket 51 for cleaning. After cleaning, hang it on the hook 22 again, start the lifting mechanism 4, and return to the furnace body 1.

[0060] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A material suction device for producing biomass hard carbon negative electrode materials, comprising a furnace body (1), characterized in that: Also includes: Sealing cover mechanism (2), air extraction mechanism (3), lifting mechanism (4), and cleaning mechanism (5); Two sets of telescopic guide rods (11) are respectively provided on the outer walls of both sides of the furnace body (1); The sealing cover mechanism (2) is slidably arranged on the top of the furnace body (1), and a vacuum chamber (12) is formed between the sealing cover mechanism (2) and the furnace body (1) when they are sealed; The exhaust mechanism (3) is arranged on a side wall of the furnace body (1), the exhaust mechanism (3) is connected to the vacuum chamber (12), a one-way door (31) is arranged in the exhaust mechanism (3), the one-way door (31) is opened when the exhaust mechanism (3) is in operation, the exhaust mechanism (3) performs a vacuum process on the vacuum chamber (12), and the one-way door (31) is closed after the exhaust mechanism (3) completes operation; The lifting mechanism (4) is arranged on the outer wall of the furnace body (1), and the lifting mechanism (4) drives the sealing cover mechanism (2) to move up and down; The cleaning mechanism (5) is arranged at the bottom of the furnace body (1), and the cleaning mechanism (5) cleans the residues and impurities at the bottom of the furnace body (1). The cleaning mechanism (5) comprises a slag basket (51), and the slag basket (51) is hooked under the sealing cover mechanism (2) and moves up and down with the sealing cover mechanism (2).

2. The material suction device for producing biomass hard carbon negative electrode materials according to claim 1, characterized in that: A control panel (13) and an indicator light (14) are provided on the outer wall of the furnace body (1), and a pair of lock buckles (15) are provided on the top of the furnace body (1).

3. The material suction device for producing biomass hard carbon negative electrode materials according to claim 1, characterized in that: The sealing cover mechanism (2) comprises a sealing cover (21), a hook (22), a pressure relief valve (23), and a connecting arm (24); The sealing cover (21) is arranged on the top of the furnace body (1); The hook (22) is rotatably mounted on the lower end surface of the sealing cover (21), a hook groove (221) is provided below the hook, and two groups of the hooks (22) are provided, and the two groups of the hooks (22) are respectively arranged on both sides of the lower end surface of the sealing cover (21); The pressure relief valve (23) is arranged through the center of the sealing cover (21); One end of the connecting arm (24) is fixed to the sealing cover (21), and the other end is correspondingly sleeved on the telescopic guide rod (11).

4. The material suction device for producing biomass hard carbon negative electrode materials according to claim 3, characterized in that: The hook (22) is rotated to be horizontal and abuts against the lower end surface of the sealing cover (21), and a magnetic attraction block (25) is embedded at the bottom of the sealing cover (21) where the hook (22) abuts against the hook (22).

5. The material suction device for producing biomass hard carbon negative electrode materials according to claim 3, characterized in that: Limiting columns (511) adapted to the hook grooves (221) are arranged on both sides of the slag basket (51), and the limiting columns (511) are correspondingly suspended at the hook grooves (221).

6. The material suction device for producing biomass hard carbon negative electrode materials according to claim 3, characterized in that: Handles (512) are also provided on both sides of the slag basket (51), and the handles (512) do not fit in contact with the inner wall of the furnace body (1).

7. The material suction device for producing biomass hard carbon negative electrode materials according to claim 1, characterized in that: The air extraction mechanism (3) further comprises a mechanical pump (32), an air pipe (33), and a filter screen (34); The mechanical pump (32) is arranged outside the furnace body (1); The air pipe (33) is in communication with the mechanical pump (32) and the furnace body (1); The filter screen (34) is arranged at a position where the air pipe (33) and the vacuum chamber (12) are connected.

8. The material suction device for producing biomass hard carbon negative electrode materials according to claim 1, characterized in that: The lifting mechanism (4) comprises a cylinder (41) and a connecting rod (42); The cylinder (41) is fixedly arranged in the middle of the outer wall of one side of the furnace body (1); One end of the connecting rod (42) is fixedly connected to the top of the piston of the cylinder (41), and the other end is fixedly connected to the sealing cover mechanism (2).

9. The material suction device for producing biomass hard carbon negative electrode materials according to claim 1, characterized in that: The cleaning mechanism (5) further comprises a workbench (52), a driving member (53), and a scraping rod (54); The workbench (52) is arranged at the center of the bottom of the vacuum chamber (12), and the workbench (52) is in the shape of a truncated cone; The driving member (53) is arranged below the workbench (52), and the rotating shaft of the driving member (53) penetrates the workbench (52); The scraper rod (54) is driven by the driving member (53) to rotate and is disposed on the upper end surface of the workbench (52).

10. The material suction device for producing biomass hard carbon negative electrode materials according to claim 9, characterized in that: The horizontal height of the workbench (52) is higher than the bottom of the furnace body (1); The outer wall of the slag basket (51) is rectangular and embedded in the bottom of the furnace body (1); the middle part of the slag basket (51) is cylindrical and fits on the workbench (52); the upper end surface of the fitting part of the slag basket (51) is inclined, and the highest point of the inclined part is lower than the horizontal height of the workbench (52).

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