A pressurized roasting furnace for producing high-purity graphite

Abstract

The invention relates to a compression roasting furnace for producing high-purity graphite. The compression roasting furnace comprises a heating and roasting furnace body, and a furnace cover which is arranged above the heating and roasting furnace body, wherein the inner wall of the heating and roasting furnace body is provided with a thermal insulation layer, a product crucible container is arranged on the inner side of the thermal insulation layer, a heating coiled tube is arranged on the outer wall of the product crucible container, a cooling liquid thermal insulation layer is arranged on the outer side of the heating and roasting furnace body, a pressure container is arranged on the outer side of the cooling liquid thermal insulation layer, and pressure-preservation blocks are respectively arranged above and at the bottom of the pressure container. When a production adhesive volatilizes, the compression roasting furnace disclosed by the invention always heats under the certain pressure, a coking value reaches 83-90%, the production period can be shortened by 15 days, the yield reaches 98%, the traditional negative-pressure roasting coking value is up to 68-72%, the production period is 35-50 days, and the yield is up to 85-90%; and compared with the prior art, the compression roasting furnace disclosed by the invention is remarkably better than the traditional negative-pressure roasting furnace.

Description

technical field [0001] The invention relates to the carbon material industry, in particular to a roasting furnace, in particular to a pressurized roasting furnace for producing high-purity graphite. Background technique [0002] High-purity graphite, also known as flake-like high thermal conductivity carbon powder, has the advantages of high strength, good thermal shock resistance, high temperature resistance, oxidation resistance, small resistivity, corrosion resistance, and easy precision machining, etc. It is an ideal inorganic non-metallic material . Used for processing and manufacturing electric heating elements, structural casting molds, crucible boats for smelting high-purity metals, heaters for single crystal furnaces, graphite for EDM, sintering molds, electron tube anodes, metal coating, graphite crucibles for semiconductor technology, Graphite anodes, grids, etc. for emitting electron tubes, thyratrons, and mercury arc rectifiers. [0003] The sintering furnace ...

AI Technical Summary

Problems solved by technology

[0003] The sintering furnace is an industrial furnace body that can significantly reduce the sintering temperature, greatly reduce energy consumption, shorten the sintering time, significantly increase the structure density, refine the grain, and improve the material performance. At present, the furnace type used in the production of high-purity graphite There are ring furnaces to be covered, car bottom furnaces, open ring furnaces, etc. These furnace types have shortcomings in the process of use: the traditional baking furnace for graphite production has a long production cycle, high energy consumption, and serious pollution

These factors seriously affect the quality of high-purity graphite production

The furnace types mentioned above belong to negative pressure roasting furnaces. During production, the products are buried with fillers, heated up after 500 to 700 hours, and then cooled. A cycle takes 35 to 50 days, because it is negative pressure roasting, at temperature After reaching the softening temperature of the binder, the asphalt binder will volatilize, resulting in a decrease in the coking value, and sometimes a large area of ​​cracking. This problem has always plagued the production of high-purity graphite

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