High-permeability furnace compartment structure for negative electrode material production

Abstract

The utility model discloses a high air permeability furnace compartment structure for negative electrode material production, which comprises furnace walls and electrode strips at four corners of the furnace walls, through holes are arranged in the middles of two longer furnace walls, vent pipes are arranged in the through holes, a communicating pipe is detachably arranged between the two vent pipes at corresponding positions of the two furnace walls, and the communicating pipe is communicated with the electrode strips. The high-permeability furnace compartment structure for negative electrode material production is obtained based on improvement of an existing furnace compartment structure, the improvement cost is low, the time required for material cooling can be effectively shortened, operation is easy and convenient, and the high-permeability furnace compartment structure can be well matched with an existing furnace charging process. As the specific surface area of the negative electrode material is oxidized when the negative electrode material is in contact with air at the temperature of 300 DEG C or above, the risk that the material is oxidized when being in contact with the air is avoided by the non-contact air cooling mode, the negative electrode material is suitable for interventional cooling at the temperature of 280-1200 DEG C, and the natural cooling period of the material is shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to the production technology field of lithium battery negative electrode material, specifically to high permeability furnace compartment structure for negative electrode material production. BACKGROUND

[0002] The production of lithium battery cannot leave artificial graphite. Graphitization is the key process of artificial graphite production, mainly using thermal activation to realize the ordered conversion of carbon atoms from disordered layer structure to graphite crystal structure. The graphite powder after graphitization needs to be cooled before discharging. The original process relies on the natural cooling of heat preservation material to sequentially grab all the heat preservation material to leak out the cover plate to make the powder product naturally cool down. This cooling process needs about 50-60 days, so the furnace turnover rate is low, which further reduces the production capacity. One of the reasons for the low cooling efficiency is the poor permeability of the furnace compartment of the furnace body. Based on this, we improved the furnace compartment structure to have high permeability to improve the cooling efficiency of the material. SUMMARY

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a high permeability furnace compartment structure for negative electrode material production, which can effectively solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a high permeability furnace compartment structure for negative electrode material production, including furnace wall and electrode strip at four corners thereof, through holes are arranged in the middle of the two longer furnace walls, a gas permeable pipe is arranged in the through hole, and a communication pipe is detachably arranged between the two gas permeable pipes at the corresponding positions on the two furnace walls.

[0005] As a preferred technical scheme of the utility model, the number of through holes arranged in the middle of the furnace wall is 3-5, and the distance between adjacent two through holes is consistent.

[0006] As a preferred technical scheme of the utility model, the gas permeable pipe is made of stainless steel, and the pipe wall thickness is not less than 2mm.

[0007] As a preferred technical scheme of the utility model, a sealing cover is arranged at one end of the gas permeable pipe on the outside of the furnace compartment.

[0008] Compared with the prior art, the utility model has the beneficial effects that: the high permeability furnace compartment structure for negative electrode material production is improved based on the existing furnace compartment structure, the improvement cost is low, the time required for material cooling can be effectively reduced, the operation is simple and convenient, and it can be well adapted to the existing furnace loading process. Since the negative electrode material temperature is above 300℃, the specific surface area will be oxidized when contacting air. This non-contact air cooling mode avoids the risk of material oxidation by contacting air and is suitable for intervening cooling between 280℃ and 1200℃, which shortens the natural cooling period of the material. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 The utility model structure schematic view.

[0010] In the figure: 1 furnace wall, 2 electrode strip, 3 gas permeation pipe, 4 sealing cover, 5 communication pipe. DETAILED DESCRIPTION

[0011] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0012] Please refer to Figure 1 The utility model provides a kind of technical scheme: a high gas permeability furnace compartment structure for negative electrode material production, including furnace wall 1 and the electrode strip 2 of four corners thereof, the middle part of two longer pieces of furnace wall 1 is provided with through hole, and the number of through hole is 3-5, the distance between adjacent two through holes is consistent, if the number of through hole is too much, there is the problem of inconvenient operation when loading, if the number is too few, the gas permeability effect of furnace compartment is not good, gas permeation pipe 3 is arranged in through hole, and detachably set up communication pipe 5 between the two gas permeation pipes 3 of corresponding position on two pieces of furnace wall 1, gas permeation pipe 3 is made of stainless steel, and the thickness of pipe wall is not less than 2mm, stainless steel material is resistant to high temperature and has long service life, and thicker wall thickness can resist greater pressure exerted by material, so that it is not easy to be deformed, and one end of gas permeation pipe 3 located at the outside of furnace compartment is provided with sealing cover 4, sealing cover 4 can reduce heat loss from gas permeation pipe 3 in heating stage.

[0013] In use, first loading is carried out, i.e. powder-like raw material is filled into furnace compartment, after half loading is completed, worker sleeve connects communication pipe 5 with two sides of gas permeation pipe 3, continues to load, and sealing cover 4 is sleeved on gas permeation pipe 3 in heating stage, and sealing cover 4 is removed in cooling stage, since the temperature of material is partially transferred into communication pipe 5, indirectly improves the contact area of material and external air, and then improves the gas permeability of furnace compartment. And since the temperature of negative electrode material is above 300 DEG C, contact with air can produce specific surface area oxidation, and this non-contact air cooling mode avoids the risk of oxidation of material contacting air, is suitable for intervening cooling between 280 DEG C-1200 DEG C, and shortens the natural cooling period of material.

[0014] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high permeability furnace compartment structure for negative material production, comprising a furnace wall (1) and electrode strips (2) at four corners of the furnace wall, characterized in that: The middle part of the longer two-piece furnace wall (1) is provided with a through hole, and a gas permeable pipe (3) is arranged in the through hole.

2. The high permeability furnace compartment structure for negative material production according to claim 1, characterized in that: The number of through holes arranged in the middle part of the furnace wall (1) is 3-5, and the distance between two adjacent through holes is consistent.

3. The high permeability furnace box structure for negative material production according to claim 1, characterized in that: The gas permeable pipe (3) is made of stainless steel, and the pipe wall thickness is not less than 2mm.

4. The high permeability furnace box structure for negative material production according to claim 1, characterized in that: The end of the gas permeable pipe (3) located outside the furnace chamber is provided with a sealing cover (4).

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