Novel graphitization method for large-size isostatic pressing round roasted product

Abstract

The invention discloses a novel graphitization method for a large-size isostatic pressing round roasted product. The novel graphitization method comprises the following steps: step 1, adding heat preservation layers to the inner sides of furnace walls on two sides; step 2, putting a large-size isostatic pressing round roasted product into a furnace, and directly vertically placing the product; step 3, filling a filler into the furnace; step 4, paving a layer of large-size isostatic pressing round roasted product on the upper surface of the filler again; step five, paving a layer of large-sizeisostatic pressing round roasted product on the upper surface of the second layer of the filler again; step six, contacting a conductive electrode that penetrates through the furnace body with the filler; step 7, starting the conductive electrode; and step 8, after graphitization is finished, taking out and transferring the product by a worker. According to the novel graphitization method, a large-size isostatic pressing round roasted product is vertically placed and does not need to be placed down, the possibility of collision damage is avoided; through the graphite plate, a drainage effect is achieved, the furnace core is uniform in heating, and the temperature in the furnace is uniform in distribution.

Description

technical field [0001] The invention relates to the technical field of graphite material processing, in particular to a novel graphitization method for large-scale isostatically pressed circular roasted products. Background technique [0002] In the graphite production process, graphitization is a very important link. The so-called graphitization is to place the roasted product in a high-temperature Acheson furnace and heat it to above 2300°C-2500°C in a protective medium to make the graphite hexagonal carbon atoms The high-temperature process of transforming the planar grid structure from a disorderly arrangement in two-dimensional space to an ordered graphitized structure in three-dimensional space. Its purpose and function are to improve the thermal conductivity, electrical conductivity, thermal stability, chemical stability, thermal shock resistance, lubricity, and wear resistance of graphite materials; to purify and remove impurities and reduce hardness to facilitate pr...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new type of graphitization method for large-scale isostatically pressed circular roasted products, to solve the problem that the filler will expand and shrink during the heating process of graphite production in the above-mentioned background technology. When the product is installed horizontally, the filler is in the gap between the horizontally installed round roasted product. When the filler shrinks, the round roasted product is prone to rolling and displacement, which causes the cross section through which the current passes to be dislocated, resulting in uneven current flow through the round roasted product and the filling. The temperature distribution of the furnace core is uneven, and the round roasted product is easy to crack; the filling in the gap between the horizontally installed round roasted product is not inserted tightly in the gap between the upper and lower layers, and the phenomenon of filling may appear when the filler shrinks, resulting in round roasting. If the product is not wrapped by fillers, a large number of cracks or blisters will appear on the surface of the round roasted product; during the furnace loading process, the round roasted product will be put down first and then transported into the furnace. The round roasted products are easy to be damaged by the medium, and the round roasted products are easy to roll when loading the furnace, which increases the labor load of the workers.