Graphitization processing method for soft coal and coal-rock compositions thereof

A technology of graphitization treatment and coal rock components, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems that graphitization research is still blank, and achieve easy graphitization, high catalytic graphitization activity, The effect of increasing the degree of graphitization

Active Publication Date: 2014-09-03
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

From a chemical point of view, the degree of metamorphism of bituminous coal is relatively low. Although there is a certain aromatic layer structure, its size and combination mode are quite different from those of ant

Method used

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  • Graphitization processing method for soft coal and coal-rock compositions thereof
  • Graphitization processing method for soft coal and coal-rock compositions thereof
  • Graphitization processing method for soft coal and coal-rock compositions thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1. First place the bituminous coal in a pulverizer to crush it into coal particles, and then place it in a planetary ball mill for ball milling to obtain a particle size D 90 ≤20μm coal powder;

[0034] Step 2: Carry out deashing treatment to the pulverized coal described in step 1. The specific process is: get 100mL acid solution and pour it into a plastic beaker, wherein the acid solution consists of 50mL deionized water, 30mL hydrochloric acid (37% by mass percentage) and 20mL acid solution. Hydrofluoric acid (mass percentage concentration 45%) is mixed evenly, and then 10g of coal powder is added to the acid solution according to the mass ratio of 1:10 and mixed evenly, and the temperature is continuously magnetically stirred for 0.5 h, then use a Buchner funnel to carry out suction filtration, and fully wash with deionized water until there is no chlorine ion remaining in the coal powder (the method of dripping silver nitrate solution can be used for inspectio...

Embodiment 2

[0038] The difference between this example and Example 1 is that in step one, the coal rock components are obtained from the bituminous coal by the method of manual stripping, and then the coal rock components are first placed in a pulverizer to be crushed into coal particles, and then Place it in a planetary ball mill for ball milling to obtain a particle size D 90 Coal powder ≤ 20 μm, the coal rock component is vitrinite.

Embodiment 3

[0040] The difference between this example and Example 1 is that in step one, the coal rock components are obtained from the bituminous coal by the method of manual stripping, and then the coal rock components are first placed in a pulverizer to be crushed into coal particles, and then Place it in a planetary ball mill for ball milling to obtain a particle size D 90 Coal powder ≤ 20 μm, the coal rock component is silk group.

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Abstract

A provided graphitization processing method for soft coal and coal-rock compositions thereof comprises the following steps: step 1, crushing soft coal into a coal powder; or firstly employing a manual peeling method to obtain coal-rock compositions from soft coal, and then crushing coal-rock compositions, so as to obtain a coal powder; step 2, performing de-ashing processing; step 3, uniformly mixing the coal powder with a catalyst to obtain a mixed powder; and step 4, performing graphitization processing, so as to obtain a graphitized product with the graphitization degree of 75% or more. According to the method, soft coal or coal-rock compositions peeled from soft coal are taken as the raw material, the influence of the catalyst iron chloride or boric acid on high-temperature graphitization of soft coal or coal-rock compositions thereof is investigated, graphitization of soft coal or coal-rock compositions thereof is realized, a new technology for employing soft coal to prepare ultrafine graphite powder is exploited, a new approach is developed for utilization of high added value of soft coal, and a new carbon raw-material source is developed for graphite materials.

Description

technical field [0001] The invention belongs to the technical field of coal conversion fine chemicals, and in particular relates to a graphitization treatment method for bituminous coal and its coal rock components. Background technique [0002] Graphite material has superior properties incomparable to other materials such as high temperature resistance, corrosion resistance, self-lubrication, thermal shock resistance, thermal conductivity and electrical conductivity, and has been widely used in aviation, aerospace, nuclear industry, military industry and many civil industries. At present, the carbonaceous raw materials commonly used to prepare graphite materials mainly include anthracite, petroleum coke, pitch coke, metallurgical coke, natural graphite, carbon black, etc. Among them, natural flake graphite is relatively brittle and is easy to break and refine during the mixing process. It destroys the original high-orientation structure of flake graphite; with the rising pr...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/205
Inventor 张亚婷张晓欠周安宁党永强司云鹏云卉
Owner XIAN UNIV OF SCI & TECH
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