Method for granulating and forming silicon carbide fine powder and silicon carbide granule

A technology of silicon carbide fine powder and silicon carbide particles, which is applied in the granulation and molding of silicon carbide fine powder, and the field of silicon carbide particles, can solve the problems of furnace explosion, product quality decline, waste, etc., and achieve the benefit of airflow and heat conduction, Increased recycling and energy saving effects

Inactive Publication Date: 2012-06-13
朱胜利
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if silicon carbide fine powder is directly added during silicon carbide smelting, the carbon monoxide gas generated during silicon carbide smelting will not be able to be discharged smoothly, which will easily cause furnace blasting or explosion.
At present, for the sake of safety, silicon carbide prod

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of mixed pellets:

[0032] (1.1) Select silicon carbide fine powder:

[0033] Take the fine powder produced during the process of processing silicon carbide crystal blocks into abrasives or take the waste silicon carbide fine powder produced during the cutting process of solar wafers;

[0034] (1.2) Configure adhesive solution:

[0035] Choose SiO 2 25% silica sol;

[0036] The above-mentioned selection is placed in a stirring device and stirred and mixed evenly to obtain a mixed granulated material; wherein the silicon carbide fine powder and the adhesive solution in the selection each account for a mass percentage of 3 to 3.5:1 (the mass percentage of the silicon carbide fine powder is adjusted due to its different granularity);

[0037] (2) the mixed granulated material is placed in mechanical granulated equipment to make 8mm granulated material;

[0038] (3) The finished silicon carbide particles are dried to become finished products.

Embodiment 2

[0040] (1) Preparation of mixed pellets:

[0041] (1.1) Select silicon carbide fine powder:

[0042] Take the fine powder produced during the process of processing silicon carbide crystal blocks into abrasives or take the waste silicon carbide fine powder produced during the cutting process of solar wafers;

[0043] (1.2) Configure adhesive solution:

[0044] Choose SiO 2 25% silica sol;

[0045] (1.3) Selection of reaction compensation materials:

[0046] Starch and water are prepared into a mixed solution in a weight ratio of 1:4;

[0047] (1.4) Select the impurity removal agent sodium chloride:

[0048] Get the impurity removal agent sodium chloride that is processed into fine powder;

[0049] The above-mentioned selection is placed in a stirring device and stirred and mixed evenly to obtain a mixed granulated material; wherein the mass percentage of silicon carbide fine powder and adhesive solution in the selection is 6 to 6.5:1 (the mass percentage of silicon carbid...

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Abstract

The invention relates to a method for granulating and forming silicon carbide fine powder and a silicon carbide granule. The method comprises the following steps of: 1, selecting the silicon carbide fine powder; 2, preparing adhesive solution; 3, mixing the silicon carbide fine powder which is obtained in the step 1 and the adhesive solution which is obtained in the step 2 according to a mass ratio of 10: 1-2:1; and 4, granulating and forming the mixture which is obtained in the step 3 by using mechanical granulating equipment. The invention provides the method for granulating and forming the silicon carbide fine powder, which has the advantages that furnace jet and furnace explosion can be prevented, the utilization ratio of the silicon carbide fine powder is high, the energy consumption is low, the degree of the environment pollution is low and the operation is simple and convenient, and the silicon carbide granule.

Description

technical field [0001] The invention belongs to the field of material preparation, and relates to a molding method of granular materials, in particular to a granulation molding method of silicon carbide fine powder and silicon carbide particles. Background technique [0002] In the production and application of silicon carbide, there will be great waste in two aspects: First, in the process of processing silicon carbide crystal blocks into abrasives, especially in the processing of solar wafer cutting blades, 40% of the raw materials will be generated Above fine powder; The 2nd, can produce a large amount of used waste green silicon carbide cutting material fine powders in the cutting process of solar wafer. Except for a very small amount of these fine powders that can be used reasonably, most of them are used to be processed into lower-grade refractory materials. During the production process of silicon carbide, its basic reaction is: SiO 2 +3c=Sic+2CO-498kJ, because sili...

Claims

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Application Information

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IPC IPC(8): B01J2/28
Inventor 朱胜利袁逢宽
Owner 朱胜利
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