Graphitization furnace and method for heat treatment of graphite powder by virtue of graphitization furnace

Abstract

The invention discloses a graphitization furnace and a method for heat treatment of graphite powder by virtue of graphitization furnace. A plurality of graphite boxes, which are connected and communicated with one another, are arranged among symmetric electrodes arranged inside a furnace body of the graphitization furnace from a furnace head to a furnace tail, vent holes are formed in one surface, which is opposite to the side wall of the furnace body, of each graphite box, and vent pipes penetrate through the vent holes, extend to the outside of the side wall body and are connected with a purifying gas tank; each graphite box is formed by assembling graphite blocks made of a graphite material. The method for heat treatment of graphite powder comprises the steps of assembling a graphite box, distributing vent pipes, filling powder, sealing a cover, filling a thermal-insulation material, graphitizing by heating, introducing gas and purifying, cooling, discharging and the like. By virtue of the graphitization furnace and the corresponding method, graphite powder is subjected to heat treatment and purified so as to achieve the advantages of low energy consumption, high thermal efficiency and high yield; the product has the advantages of stable quality and high purity, the gas flow rate of the purifying gas is decreased, no protective gas such as nitrogen is used and thus negative impacts of nitrogen on the performance of products such as synthetic diamond or negative electrode materials of a lithium battery negative positive material are avoided.

Description

technical field [0001] The invention belongs to the technical field of heat treatment of graphite powder, in particular to a graphitization furnace and a method for heat treatment of graphite powder. Background technique [0002] The carbon atoms of carbonaceous materials are arranged irregularly. Only through high-temperature heat treatment at 2200-2600°C can the carbon atoms be recrystallized and rearranged in an orderly manner to present the crystal structure of graphite, which has many excellent properties of graphite, such as electrical conductivity. Significantly improved performance and thermal conductivity, better chemical and thermal stability, fewer impurities, lower hardness, easier machining, and more. Therefore, the graphitization process is an important process in the production of carbon products, and the graphitization furnace is the key equipment for the production of carbon products. It is mainly used for high-temperature treatment of graphite powder purifi...

AI Technical Summary

Problems solved by technology

Compared with the Acheson furnace, the serial graphitization furnace has the advantages of uniform product heat treatment temperature, high overall furnace temperature, stable product quality, low production power consumption, and is suitable for the production of large-scale products. However, it is affected by the nature of the material itself. As well as the limitations of the processing technology of existing molding equipment and the limitation of the cross-sectional diameter of the conductive current plate, the maximum output of the inner series graphitization furnace can only reach 30 tons per furnace, and the low output is the biggest bottleneck of the inner series furnace, and The hoisting of the green body is also extremely cumbersome, and continuous operations cannot be realized

Images