Purifying device and manufacturing process of low energy consumption lithium battery graphite negative electrode material

Abstract

The invention discloses a purifying device and a manufacturing process of a low energy consumption lithium battery graphite negative electrode material, the purifying device comprises an Acheson furnace main body, wherein the Acheson furnace main body is enclosed by a furnace base, a furnace head wall, a furnace tail wall and a furnace wall panel, the furnace head wall and thefurnace tail wall arerespectively provided with conductive electrodes, the conductive electrodes penetrate the furnace head wall or the furnace tail wall and extend to the two sides of the outer walls of the furnace headwall or the furnace tail wall, the top of the furnace base is provided with a quartz sand layer and a coke powder layer in order from bottom to top, and the top of the coke powder layer is provided with a furnace core. A process for producing a lithium battery negative electrode material is adopted, the furnace core can reach a higher temperature, the graphitization degree of a raw material of the negative electrode material, a calcined coke layer and a petroleum coke layer is higher, and performances of a negative electrode material finished product and a recarburizing agent are better. Theelectricity consumption per ton of the negative electrode material is reduced to about 1 / 2 of the electricity consumption, the output of the recarburizing agent is doubled, the furnace body is cooledquickly, the furnace is released quickly, and the environmental protection and energy saving effect is remarkable.

Description

technical field [0001] The invention relates to the field of lithium ion battery negative electrode material preparation, in particular to a low energy consumption lithium battery graphite negative electrode material purification device and a manufacturing process thereof. Background technique [0002] Anode materials are key materials that play a decisive role in the performance of lithium batteries. The specific capacity and working voltage of the negative electrode directly determine the energy density of the lithium battery, and it is one of the most important battery materials. At present, the mainstream anode materials are still natural graphite and artificial graphite. Among them, the production process of artificial graphite anode materials includes material selection, spheroidization, coating, carbonization and graphitization, and graphitization is an important process in the production process of artificial graphite anode materials. At present, most of the tradit...

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Problems solved by technology

The traditional use of Acheson furnace to process negative electrode materials requires power transmission for 35 to 60 hours, and the power consumption per ton of products is 15,000 to 16,000 degrees. , the temperature distribution of the upper and lower layers of the Acheson furnace is uneven, which may easily cause uneven heating of the product during the graphitization process, resulting in uneven graphitization degree, thus affecting product quality

[0004] There are also many problems in the Acheson graphitization process. At present, most of the graphitization furnaces simply use calcined coke as the resistance material, but the calcined coke cannot be in contact with water, so the cooling method is limited, and only natural cooling can be used. Second, calcined coke has the problems of large loss and pollution, and the operation process is not easy to control; and after high-temperature treatment, the quality of the by-product of calcined coke-recarburizer is low

In actual production, the charging capacity of calcined coke only reaches about 1 / 3 of the volume of the furnace body, resulting in low output and unstable quality of auxiliary materials obtained from a single furnace

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