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A super-sized graphite product and its graphitization method

A technology of graphite products and super-large specifications, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problem of low furnace resistance

Active Publication Date: 2020-02-07
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low furnace resistance, this method is not suitable for the graphitization of ultra-large graphite products.

Method used

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  • A super-sized graphite product and its graphitization method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A graphitization method for ultra-large graphite products. The graphitization method includes preparing the furnace body, laying the furnace bottom, surrounding the furnace core, padding the bottom cushion, loading products, filling resistance materials, covering the top cushion, reaction materials and insulation materials, Power transmission, cooling. Specific steps are as follows:

[0056] (1) Prepare the furnace body: remove the furnace core resistance material, then clean the furnace side insulation material, so that the two materials do not mix, and finally clean the furnace bottom. After the silicon carbide layer is removed to the yellow material part, inspect the bottom of the furnace in three sections: front, middle and back, and check the structure of the yellow material. It can be used, but if the structure layer of the yellow material layer is thick and the hardness is strong, it needs to be cleaned. If there is a graphitized structure in the lower part of ...

Embodiment 2

[0079] (1) Prepare the furnace body: remove the furnace core resistance material, then clean the furnace side insulation material, so that the two materials do not mix, and finally clean the furnace bottom. After the silicon carbide layer is removed to the yellow material part, inspect the bottom of the furnace in three sections: front, middle and back, and check the structure of the yellow material. It can be used, but if the structure layer of the yellow material layer is thick and the hardness is strong, it needs to be cleaned. If there is a graphitized structure in the lower part of three sections or two of them, the bottom of the furnace must be completely removed. If only one section has a graphitized structure, expand the scope of local removal. The side wall insulation material needs to be cleaned up, and it is not allowed to replace the bottom material with the old insulation material. The sticky matter at the furnace head and tail needs to be cleaned every furnace....

Embodiment 3

[0102] (1) Prepare the furnace body: remove the furnace core resistance material, then clean the furnace side insulation material, so that the two materials do not mix, and finally clean the furnace bottom. After the silicon carbide layer is removed to the yellow material part, inspect the bottom of the furnace in three sections: front, middle and back, and check the structure of the yellow material. It can be used, but if the structure layer of the yellow material layer is thick and the hardness is strong, it needs to be cleaned. If there is a graphitized structure in the lower part of three sections or two of them, the bottom of the furnace must be completely removed. If only one section has a graphitized structure, expand the scope of local removal. The side wall insulation material needs to be cleaned up, and it is not allowed to replace the bottom material with the old insulation material. The sticky matter at the furnace head and tail needs to be cleaned every furnace....

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Abstract

The invention relates to the technical field of graphite product processing, in particular to a large-scale graphite product and a graphitizing method thereof. The large-scale graphite product has thevolume density being 1.82 to 1.87g / cm<3>, the electrical resistivity being 5 to 6 mu omega. m, and the porosity being 9 to 12 percent; according to the graphitizing method, during power transmissioninitial power, the electrical resistivity of a furnace core is 21 to 27m omega. m, preferably 25m omega. m, and a fluctuation range of the electrical resistivity of the furnace core is 5 to 10 percentduring a graphitizing process. According to the large-scale graphite product and the graphitizing method thereof provided by the invention, through adjusting the initial furnace core electrical resistivity, changing a charging way of the large-scale graphite product, and adjusting a power increasing speed of a power transmission curve, the graphitized product has a favorable compact performance,and the yield is improved.

Description

technical field [0001] The invention belongs to the technical field of graphite material processing, and in particular relates to a super-sized graphite product and a graphitization method thereof. Background technique [0002] In the graphite production process, graphitization is a very critical process. After high-temperature heat treatment above 2300 ° C, it determines the physical and chemical properties of graphite products. The carbon atoms in the graphite roasted product are transformed from the thermodynamically unstable "two-dimensional disorderly overlapping" arrangement to the "three-dimensional orderly overlapping" arrangement by thermal activation, which makes the product's thermoelectric conductivity, thermal shock resistance, chemical stability, Anti-oxidation performance, lubricity and wear resistance are further improved, impurities are removed to improve purity, and hardness is reduced to facilitate machining. The specific process is to fill the filler cok...

Claims

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Application Information

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IPC IPC(8): C01B32/205
Inventor 张二丽刘伟凯狄志宇董贤虎孙喜贵
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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