Graphitization furnace

Abstract

The invention discloses a graphitization furnace. The graphitization furnace comprises an induction coil located at the outer side a furnace body and used for inducing a heating material, and the induction coil is an encapsulated induction coil; and the graphitization furnace is a graphitization furnace without metal furnace shells, and the induction coil arranged at the outermost layer of the graphitization furnace also serves as a furnace shell. The graphitization furnace provided by the invention has no furnace shells or heat insulation layers, so that the volume of the furnace body is unlimited, and the maintenance costs after the furnace is used at one time are extremely low, and the graphitization furnace is especially suitable for batched continuous production of heat treatment of materials.

Description

technical field [0001] The invention relates to a graphitization furnace, belonging to the field of graphitization furnaces. Background technique [0002] With the development of new energy and power, lithium-ion batteries are increasingly favored by investors. As a key component of lithium-ion batteries, the market for carbon anode materials is also facing blowout development. A key step in the production process of carbon anode materials is to increase the degree of graphitization and improve the purity. Graphitization refers to the transformation of carbon atoms from random and irregular arrangement to a regular hexagonal planar network structure at high temperature, that is, graphite microcrystalline structure. The purpose is to obtain the properties of graphite with high electrical conductivity, high thermal conductivity, corrosion resistance, and friction resistance. The graphitization temperature can be as high as 3100°C. The higher the temperature, the more perfect ...

AI Technical Summary

Problems solved by technology

[0003] The Acheson furnace is a graphitization furnace that realizes large-scale high-temperature graphitization production. It is characterized by large batches, but because it is an open structure, there is no centralized treatment of tail gas, and a large amount of filler coke is used to generate heat for resistance, resulting in high energy consumption. , pollute the environment, uneven temperature

Although there is an internal series electrode graphitization furnace that has been improved through technology, the problems of high energy consumption, heavy pollution, and uneven temperature have not been solved.

Chinese patent CN201010108189.8 discloses a vertical high-temperature continuous graphitization furnace. The upper and lower electrode pairs are connected to a DC power supply, and the material is used as a resistance to generate heat. The disadvantages are high energy consumption and low heating efficiency.

Later, medium-frequency induction graphitization furnaces appeared, such as a vertical continuous induction high-temperature graphitization furnace disclosed in Chinese patent CN201410666556.4, an ultra-high temperature graphitization processing equipment disclosed in Chinese patent CN201410016297.0, and a Chinese patent CN201210487294.6 disclosed A continuous high-temperature graphite purification equipment, graphite purification and graphitization high-temperature vertical continuous induction heating furnace disclosed in Chinese patent CN200910042891.6, continuous vertical medium-frequency high-temperature high-purity graphite production equipment disclosed in Chinese patent CN200920009018.2, etc. It is characterized by high heating efficiency and low energy consumption, but the thermal conductivity of the powder is low, resulting in poor temperature uniformity of the materials in the furnace and uneven performance of the product, and these graphitization furnaces have a furnace shell structure, except In addition to the need for furnace shell cooling water cooling, it also limits the size of the heating furnace, and the maintenance cost is too high. In practice, mass production of materials has not been realized.

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