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Regeneration treatment technology of cutting edge material silicon carbide

A treatment process, a technology of silicon carbide, applied in the field of silicon carbide micropowder, can solve the problems of reduced cutting efficiency, inability to continue to use, and reduced performance of cutting mortar, and achieve the effect of meeting the requirements of industrial use

Inactive Publication Date: 2016-08-24
任海涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Solar crystal silicon wafer cutting mortar In the process of silicon wafer cutting, as the cutting process proceeds, the performance of the cutting mortar will gradually decrease, resulting in a gradual decrease in cutting efficiency until it cannot be used anymore, resulting in a large amount of waste cutting mortar.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The regeneration treatment process of the cutting edge silicon carbide of embodiment 1 comprises the following steps:

[0017] S1: Separating the waste mortar from solid to liquid, adding sulfuric acid to the slurry of silicon carbide cake for pickling;

[0018] S2: adding sodium hydroxide to the silicon carbide slurry after pickling and removing impurities, and stirring to fully react the impurities in the waste mortar with sodium hydroxide;

[0019] S3: The silicon carbide after pickling and alkali cleaning is passed into the hydraulic classifier, and under the action of hydraulic force, the purified silicon carbide is fully dispersed and settled, and the settled and stratified silicon carbide is taken out in batches;

[0020] S4: adding hydrochloric acid or nitric acid to the classified silicon carbide to adjust the pH value to neutral;

[0021] S5: Concentrate the silicon carbide slurry with adjusted pH value by centrifugation, pressure filtration or inclined tube ...

Embodiment 2

[0025] The regeneration treatment process of the cutting edge silicon carbide of embodiment 2 comprises the following steps:

[0026] S1: Separating the waste mortar from solid to liquid, adding sulfuric acid to the slurry of silicon carbide cake for pickling;

[0027] S2: adding sodium hydroxide to the silicon carbide slurry after pickling and removing impurities, and stirring to fully react the impurities in the waste mortar with sodium hydroxide;

[0028] S3: The silicon carbide after pickling and alkali cleaning is passed into the hydraulic classifier, and under the action of hydraulic force, the purified silicon carbide is fully dispersed and settled, and the settled and stratified silicon carbide is taken out in batches;

[0029] S4: adding hydrochloric acid or nitric acid to the classified silicon carbide to adjust the pH value to neutral;

[0030] S5: Concentrate the silicon carbide slurry with adjusted pH value by centrifugation, pressure filtration or inclined tube ...

Embodiment 3

[0034] The regeneration treatment process of the cutting edge silicon carbide of embodiment 3 comprises the following steps:

[0035] S1: Separating the waste mortar from solid to liquid, adding sulfuric acid to the slurry of silicon carbide cake for pickling;

[0036] S2: adding sodium hydroxide to the silicon carbide slurry after pickling and removing impurities, and stirring to fully react the impurities in the waste mortar with sodium hydroxide;

[0037] S3: The silicon carbide after pickling and alkali cleaning is passed into the hydraulic classifier, and under the action of hydraulic force, the purified silicon carbide is fully dispersed and settled, and the settled and stratified silicon carbide is taken out in batches;

[0038] S4: adding hydrochloric acid or nitric acid to the classified silicon carbide to adjust the pH value to neutral;

[0039] S5: Concentrate the silicon carbide slurry with adjusted pH value by centrifugation, pressure filtration or inclined tube ...

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Abstract

The invention discloses a regeneration treatment technology of a cutting edge material silicon carbide. The technology comprises the steps such as solid-liquid separation, acid washing, alkali washing, hydraulic classification, pH regulation and drying. By adopting a method of purification through chemical reaction and particle size re-classification through hydraulic settling, the silicon carbide in waste mortar is regenerated, and the indexes such as purity and particle size of the regenerated silicon carbide reach the standard for sure. Through the treatment technology, the cutting edge material silicon carbide is regenerated, the performance indexes of the obtained product are relatively good, and the product can be applied to the silicon wafer cutting industry as a regenerated cutting edge material and completely meets the requirements of industrial application.

Description

technical field [0001] The invention relates to the field of silicon carbide micropowder, in particular to a regeneration treatment process for cutting edge silicon carbide. Background technique [0002] Solar wafer cutting mortar In the silicon wafer cutting process, as the cutting process progresses, the performance of the cutting mortar will gradually decrease, resulting in a gradual decrease in cutting efficiency until it cannot be used anymore, resulting in a large amount of cutting waste mortar. The waste mortar has become a kind of industrial hazardous waste, which requires special harmless treatment to avoid damage to the ecological environment. Cutting edge silicon carbide is the main component in waste mortar, and its composition accounts for 65% to 75% of the mass of waste mortar. Cutting edge silicon carbide is in the shape of hexagonal crystal, with high hardness, strong cutting ability and high mechanical strength. , stable chemical properties, good thermal co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/36
Inventor 任海涛
Owner 任海涛
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