Compression roasting furnace for producing high-purity graphite
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A pressurized roasting furnace and high-purity graphite technology, applied in the direction of inorganic chemistry, non-metallic elements, carbon compounds, etc., can solve the problems of long production cycle, reduced coking value, pollution, etc., and achieve the effect of high work efficiency and simple structure
Active Publication Date: 2012-11-28
FIVE STAR NEW MATERIAL TECH CO LTD
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[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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[0021] Such as figure 1 , 2 , shown in 3 and 4, a kind of pressurized calciner for producing high-purity graphite, comprises heating calciner body 3, is arranged on the stove cover 9 above heating calciner body 3, described heating calciner body 3 inner walls A heat insulation layer 4 is provided, a product crucible container 1 is arranged inside the heat insulation layer 4, a heating coil 11 is arranged on the outer wall of the product crucible container 1, and a cooling liquid heat insulation layer 5 is arranged outside the heating and roasting furnace body 3 , a pressure vessel 6 is arranged outside the coolant heat insulation layer 5 , and pressure retaining blocks 7 are arranged on the top and bottom of the pressure vessel 6 .
[0022] The bottom of the thermal roasting furnace body 3 is provided with a heat insulation platform 2, the bottom surface of the heat insulation platform 2 is connected with the pressure holding block 7 arranged at the bottom of the pressure ves...
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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 ...
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