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A method for removing free carbon in silicon carbide micropowder

A technology of silicon carbide micropowder and free carbon, applied in chemical instruments and methods, magnetic separation, solid separation, etc., can solve the problems of wasting manpower, material resources, financial resources, affecting the physical properties of products, and unqualified product quality, so as to reduce labor costs. The effect of strength, shortening of raw material pretreatment time, and increase of production capacity

Inactive Publication Date: 2012-02-22
PINGDINGSHAN YICHENG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the field of silicon carbide micropowder purification, the method commonly used in China is to separate the free carbon in the silicon carbide fine powder through the carbon washing process in the raw material treatment stage of the overflow production process. If it is not thorough, there is still a large amount of free carbon in the process of grading and grading silicon carbide, resulting in unqualified product quality, which seriously affects the physical properties of the product, and the traditional overflow grading carbon washing process is time-consuming , laborious, has a great impact on production capacity, and wastes a lot of manpower, material resources, and financial resources. Based on the above factors, it is necessary to purify and remove carbon from silicon carbide micropowder with simple production process, less manpower input, and production time saving. Methods

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The present invention, a kind of method for removing free carbon in silicon carbide micropowder, concrete steps are as follows:

[0022] step one:

[0023] Take 50 parts of silicon carbide micropowder raw material and 50 parts of deionized water, add it into the container, stir evenly, and set aside;

[0024] Step two:

[0025] The uniformly stirred raw material slurry is subjected to the following pretreatment: 1. Use magnetic materials to remove ferric oxide and iron; 2. Use gravity sedimentation method to remove particles smaller than 4.0 microns; carbon removed;

[0026] Step three:

[0027] Pump the slurry pretreated in step 2 into the grading container to classify the silicon carbide micropowder, and remove the floating carbon with a glass water repellent before the grading, when the remaining silicon carbide particles in the grading container are larger than 32 microns , stop the classification, and settle the slurry remaining in the classification container...

Embodiment 2

[0031] The present invention, a kind of method for removing free carbon in silicon carbide micropowder, concrete steps are as follows:

[0032] step one:

[0033] Take 30 parts of silicon carbide micropowder raw materials and 70 parts of deionized water, add them into the container, stir evenly, and set aside;

[0034] Step two:

[0035] The uniformly stirred raw material slurry is pretreated as follows: 1. Use magnetic materials to remove ferric oxide and iron; 2. Use gravity precipitation to remove particles smaller than 4.0 microns; Floating carbon is removed;

[0036] Step three:

[0037] Pump the slurry pretreated in step 2 into the classification container for silicon carbide micropowder classification, remove the floating carbon with silicone water repellent before classification, when the remaining silicon carbide particles in the classification container are larger than 32 microns , stop the classification, and settle the slurry remaining in the classification co...

Embodiment 3

[0041] The present invention, a kind of method for removing free carbon in silicon carbide micropowder, concrete steps are as follows:

[0042] step one:

[0043] Get 40 parts of silicon carbide micropowder raw material and 60 parts of deionized water, add it into the container, stir evenly, and set aside;

[0044] Step two:

[0045] The uniformly stirred raw material slurry is subjected to the following pretreatment: 1. Use magnetic materials to remove ferric oxide and iron; 2. Use gravity sedimentation method to remove particles smaller than 4.0 microns; carbon removed;

[0046] Step three:

[0047] Pump the slurry pretreated in step 2 into the classification container for silicon carbide micropowder classification, remove the floating carbon with silicone water repellent before classification, when the remaining silicon carbide particles in the classification container are larger than 32 microns , stop the classification, and settle the slurry remaining in the classifi...

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Abstract

A method for removing free carbon from silicon carbide micropowder comprises taking 30-50 parts of silicon carbide micropowder raw materials and 50-70 parts of deionized water and stirring them evenly, and then grading the silicon carbide micropowder for removing free carbon therein. The present invention provides a method for removing free carbon from silicon carbide micropowder, which can better remove the free carbon in the silicon carbide micropowder. Under the premise of ensuring product quality, the invention reduces the labor intensity of workers, greatly shortens the raw material pretreatment time, and increases the capacity of the inherent equipment, and has a great market prospect.

Description

technical field [0001] The invention relates to a process for purifying silicon carbide micropowder, in particular to a method for removing free carbon from silicon carbide micropowder. Background technique [0002] At present, in the field of silicon carbide micropowder purification, the method commonly used in China is to separate the free carbon in the silicon carbide fine powder through the carbon washing process in the raw material treatment stage of the overflow production process. If it is not thorough, there is still a large amount of free carbon in the process of grading and grading silicon carbide, resulting in unqualified product quality, which seriously affects the physical properties of the product, and the traditional overflow grading carbon washing process is time-consuming , laborious, has a great impact on production capacity, and wastes a lot of manpower, material resources, and financial resources. Based on the above factors, it is necessary to purify and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/36B03B5/00B03C1/02
Inventor 曲丽伟梁贵振楚红斌吉春年赵志娟张强
Owner PINGDINGSHAN YICHENG NEW MATERIAL