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Raw material composition and method for preparing special graphite material

A raw material composition, special graphite technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of poor bulk density, electrical resistivity, mechanical strength, etc., to improve bulk density and strength, and improve coking rate. , to avoid the effect of cracks

Inactive Publication Date: 2017-05-24
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve various physical and chemical indicators of special graphite materials in the prior art, such as bulk density, resistivity, ash content, poor mechanical strength, etc., the present invention provides a raw material composition and method for preparing special graphite materials, using the raw material The special graphite material prepared by the method has the characteristics of high bulk density, high purity, high temperature resistance, strong corrosion resistance, strong oxidation resistance, low porosity, low thermal expansion coefficient, etc., making its isotropic characteristics close to isostatic Pressed products

Method used

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  • Raw material composition and method for preparing special graphite material
  • Raw material composition and method for preparing special graphite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The equisquence is broken, sieved, and dosed as follows:

[0051]

[0052] The above-mentioned materials were put into a kneading pot for dry mixing. The dry mixing temperature was 150° C., and the dry mixing time was 52 minutes to obtain a dry material after dry mixing.

[0053] After the dry mixing is completed, add medium-temperature coal tar pitch into the kneading pot, and the mass percentage of dry material and medium-temperature coal tar pitch is 71%:29%. Wherein, the medium-temperature coal tar pitch is added to the dry material after dry mixing twice for kneading, the weight of the medium-temperature coal tar pitch added for the first time is 80% of the total medium-temperature coal tar pitch, and the time of kneading for the first time is 22 minutes; The weight of the medium-temperature coal tar pitch added for the second time is 20% of the total medium-temperature pitch, the time for the second kneading is 22 minutes, and the temperature for the second kne...

Embodiment 2

[0060] The equisquence is broken, sieved, and dosed as follows:

[0061]

[0062] The above-mentioned materials were put into a kneading pot for dry mixing. The dry mixing temperature was 140° C. and the dry mixing time was 55 minutes to obtain a dry material after dry mixing.

[0063] After the dry mixing is completed, add medium-temperature coal tar pitch into the kneading pot, and the mass percentage of dry material and medium-temperature coal tar pitch is 70:30%. Wherein, the medium-temperature coal tar pitch is added into the dry material after dry mixing twice for kneading, the weight of the medium-temperature coal tar pitch added for the first time is 75% of the total medium-temperature coal tar pitch, and the time of kneading for the first time is 20 minutes; The weight of the medium-temperature coal tar pitch added for the second time is 25% of the total medium-temperature pitch, the time for the second kneading is 20 minutes, and the temperature for the second kne...

Embodiment 3

[0070] The equisquence is broken, sieved, and dosed as follows:

[0071]

[0072] The above-mentioned materials were put into a kneading pot for dry mixing. The dry mixing temperature was 160° C. and the dry mixing time was 50 minutes to obtain a dry material after dry mixing.

[0073]After the dry mixing is completed, add medium-temperature coal tar pitch into the kneading pot, and the mass percentage of dry material and medium-temperature coal tar pitch is 72%:28%. Wherein, the medium temperature coal tar pitch is added into the dry material after dry mixing in two times for kneading, the weight of the medium temperature coal tar pitch added for the first time is 85% of the total medium temperature coal tar pitch, and the time of kneading for the first time is 25 minutes; The weight of the medium-temperature coal tar pitch added for the second time is 15% of the total medium-temperature pitch, the time for the second kneading is 25 minutes, and the temperature for the sec...

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Abstract

The invention belongs to the field of graphite materials, and particularly relates to a raw material composition and method for preparing a special graphite material. The raw material composition is prepared from, by weight, 70-75% of isotropic coke and 5-30% of medium temperature coal-tar pitch, and preferably 70-72% of isotropic coke and 28-30% of medium temperature coal-tar pitch. The method comprises the following steps that the isotropic coke is crushed, screened and blended, medium temperature coal-tar pitch is added for mixing kneading, vibration molding, primary roasting, primary impregnation, secondary roasting and graphitization, and the special graphite material is obtained. The physical and chemical indexes of the prepared special graphite material can compare favourably with other mid-to-high end graphite materials and also can replace the mid-to-high end graphite materials; due to the fact that the raw material sources are wide, the price is low, the preparation process is easier, the technical difficulty is low, the production cost is low, the product performance is high, the quality is good, and the price is lower than other similar or mid-to-high end graphite materials, the raw material composition is very successful in business.

Description

technical field [0001] The invention belongs to the field of graphite materials, and in particular relates to a raw material composition and a method for preparing special graphite materials. Background technique [0002] Middle-end graphite materials, that is, the existing anisotropic graphite products are produced by using calcined petroleum coke and medium-temperature coal tar pitch as aggregate and binder, and are produced through molding, roasting, impregnation, graphitization, and mechanical processing. The market price is popular, but its physical and chemical properties are anisotropic, and its quality stability is poor. [0003] High-end graphite materials, here refers to isostatic graphite products, which have isotropy, high density, high strength and very uniform characteristics, but the raw materials for isostatic pressing are demanding, generally imported raw materials, and their current prices are also High, generally 60,000 to 100,000 yuan / ton, and the advance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/205
CPCC01P2006/10C01P2006/32C01P2006/40
Inventor 闵洁张培林张培模武建军范志利刘伟凯纪永良赵宽王志辉智伟峰
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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