Process for purifying silicon carbide micro powder for linear cutting

A technology of silicon carbide micropowder and purification process, which is applied in the field of purification and purification of compounds, which can solve the problems of metal impurities and oil contamination, and achieve the effects of reducing the content of impurities, high efficiency, and simple operation

Inactive Publication Date: 2010-12-22
JIANGSU LEYUAN MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that metal impurities and oil stains will inevitably be mixed in the crushing process of the above-mentioned prior art, and t...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) Feeding process: Take 100kg of processed silicon carbide micropowder into the water tank, add 250L of water and stir evenly, heat to 40°C, stir while heating and measure the temperature;

[0014] (2) Carbon removal process: add 5ml of flotation oil and 1ml of kerosene to the above solution, record the liquid level scale, then continuously stir at a constant temperature of 40°C for 30min, then let it stand for 40min and then drain half of the water;

[0015] (3) Surfactant addition process: a. Add 1L of surfactant, add water to the scale line, keep uniform for 10min, continue to heat up to 40°C, stir while heating, keep the temperature at 40°C for 30min, then stir for 1h, and let stand 40min, drain about 75% of the water; b. Add water to the mark, stir when adding water, and heat to 40°C, keep the temperature for 10min, continue stirring for 30min, let stand for 40min, drain 75% of the water; repeat b process 3 times; foaming test, no oil on the surface;

[0016] (4...

Embodiment 2

[0019] (1) Feeding process: Take 1.2 tons of processed silicon carbide micropowder into the water tank, add 3m 3 Stir the water evenly, heat to 50°C, stir while heating and measure the temperature;

[0020] (2) Carbon removal process: Add 30ml of flotation oil and 6ml of kerosene to the above solution, record the liquid level scale, then stir continuously at a constant temperature of 50°C for 40min, and then let it stand for 40min to drain half of the water;

[0021] (3) Surfactant addition process: a. Add 12L surfactant, add water to the scale line, keep uniform for 20min, continue to heat up to 50°C, stir while heating, keep the temperature at 50°C for 30min, then stir for 1.5h, stand still Set aside for 40 minutes, drain about 60% of the water; b. Add water to the scale line, stir when adding water, and heat to 50 ° C, keep the temperature for 30 minutes, continue stirring for 60 minutes, let stand for 40 minutes, drain 60% of the water; repeat b Process 3 times; foaming t...

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PUM

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Abstract

The invention discloses a method for purifying silicon carbide micro powder for linear cutting. The method comprises the following steps of: removing carbon and oil after loading, making foaming experiments, and judging qualification if the surface has no oil; washing the material by using alkali, checking the pH (8.5 to 9.5) of a water sample, and judging qualification if the conductivity value is equivalent to the used water (the difference is less than or equal to 0.003ms/cm); and then adjusting the acidity, washing the material by excessive acid, checking the pH (6 to 7) of the water sample, judging qualification if the conductivity value is equivalent to the used water (the difference is less than or equal to 0.002ms/cm), and drying the material to obtain the purified qualified silicon carbide micro powder. The production process for the silicon carbide micro powder has the advantages of improving the SiC purity by carbon and oil removal, acid washing and alkali washing and reducing the content of impurities. The process has simple operation, short period and high efficiency.

Description

technical field [0001] The invention relates to a method for purifying carbon compounds, in particular to a process for purifying silicon carbide micropowder for wire cutting. Background technique [0002] Silicon carbide has high mechanical strength, good high temperature resistance, high thermal conductivity, good high temperature stability, and good radiation and electromagnetic loss resistance. Therefore, silicon carbide has attracted widespread attention as a high-performance special structural material. Silicon carbide micropowder is produced from silicon carbide through crushing, sorting and other processes. It is mainly used to make fine grinding wheels, oil stones, emery cloths, abrasive belts and other finishing molds, and is widely used in mechanical parts and electronic components. , Stone processing and other grinding and polishing. With the development of the world's semiconductor industry, especially the wide application of computer chips, semiconductor monoc...

Claims

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Application Information

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IPC IPC(8): C01B31/36B23H7/02
Inventor 郭露村郑益锋陈涵
Owner JIANGSU LEYUAN MATERIAL
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