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Silicon carbide micropowder carbon removal device and method

A technology of silicon carbide micropowder and roller, which is applied in the direction of silicon carbide, carbide, etc., can solve the problems of high SiC content, high production cost, waste of resources, etc., and achieve the effect of reducing SiC content, low cost and improving production efficiency

Inactive Publication Date: 2017-04-12
HENAN XINDAXIN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention aims to solve the technical problems of resource waste and high production cost caused by high SiC content in waste carbon material and large material loss in the existing silicon carbide micro-powder carbon removal technology

Method used

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  • Silicon carbide micropowder carbon removal device and method
  • Silicon carbide micropowder carbon removal device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: A kind of silicon carbide micropowder carbon removal device, see figure 1 , figure 2 , including a carbon removal pool 1, air blowing equipment, adsorption equipment and collection equipment, the adsorption equipment includes a roller support 2 arranged on the top of one side wall of the carbon removal pool 1, and a cylindrical roller 3 horizontally installed on the roller support 2 , and the drive mechanism 4 that is connected with the roller 3 and provides rotational power for the roller 3, the drive mechanism 4 is a drive motor; the bottom side of the roller 3 is located in the carbon removal pool 1, and the outer side is located in the carbon removal pool 1 outside the end side walls.

[0028] The collection equipment includes a scraper 5 and a carbon collection box 6 installed on the end side wall of the carbon removal tank 1, one side of the scraper 5 is tangent to the outer surface of the roller 3, and the other side extends to the upper opening o...

Embodiment 2

[0030] Embodiment 2: a kind of silicon carbide micropowder carbon removal method comprises the following steps:

[0031] (1) Slurry making: Add 0.5 tons of silicon carbide micropowder and deionized water to prepare a slurry with a solid content of 40%, then add 500mL of carbon collector, stir for 5 minutes, and pump the slurry into Example 1 for carbonization after the slurry is uniform In the carbon removal pool of silicon micropowder carbon removal device;

[0032] Among them: the carbon collector is kerosene. After testing, the content of free carbon in the silicon carbide powder is 0.46%, and the average particle size of the silicon carbide powder is 9.8 μm.

[0033] (2) Gas blowing: Open the air inlet valve and blow the slurry for 2 minutes, so that the carbon collector and carbon particles in the slurry are enriched on the surface of the slurry driven by the air bubbles.

[0034] (3) Adhesion carbon removal: start the adsorption equipment, the driving mechanism drives t...

Embodiment 3

[0037] Embodiment 3: a kind of silicon carbide micropowder carbon removal method comprises the following steps:

[0038] (1) Slurry making: Add 0.5 tons of silicon carbide micropowder and deionized water to prepare a slurry with a solid content of 40%, then add 1000mL of carbon collector, stir for 10 minutes, and pump the slurry into Example 1 for carbonization after the slurry is uniform In the carbon removal pool of silicon micropowder carbon removal device;

[0039] Among them: the carbon collector is terpineol. After testing, the content of free carbon in the silicon carbide micropowder is 0.53%, and the average particle size of the silicon carbide micropowder is 10.3 μm.

[0040] (2) Air blowing: Open the air intake valve and blow the slurry for 5 minutes, so that the carbon collector and carbon particles in the slurry are enriched on the surface of the slurry driven by the air bubbles.

[0041] (3) Adhesion carbon removal: start the adsorption equipment, the driving mec...

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Abstract

The invention discloses a carbon removing apparatus and method for silicon carbide micropowder. The objective of the invention is to overcome the technical problems of wasting of resources and high production cost caused by high SiC content of a waste carbon material and great material loss in conventional carbon removing technology for silicon carbide micropowder. The apparatus comprises a carbon removing pool, an air-blowing device, an adsorption device and a collection device. The method comprises the following procedures: slurry making; air blowing; carbon removal through adherency; and discharging. The carbon removing apparatus and method have good carbon removal effect and high carbon removal efficiency and can substantially reducing SiC content of the waste carbon material and great material loss and increasing the utilization rate of resources, thereby improving production efficiency and reducting production cost; and the silicon carbide micropowder treated in the invention has free carbon content of less than 0.15% and can completely meet technical indexes of a crystal silicon slice cutting edge material.

Description

technical field [0001] The invention relates to the technical field of silicon carbide micropowder production, in particular to a device and method for removing carbon from silicon carbide micropowder. Background technique [0002] Silicon carbide has the characteristics of high hardness, low expansion coefficient, and stable chemical properties. It is widely used in ceramic seals, grinding media, and silicon wafer cutting. With the advancement of science and technology, the requirement for the purity of silicon carbide powder is getting higher and higher, among which free carbon is one of the main impurities affecting the purity of silicon carbide powder. If there are many free carbon impurities in the silicon carbide micropowder, the silicon carbide sintered products will have spots and flower prints, and at the same time affect the quality requirements such as the density of the product; when it is applied to the cutting process of crystal silicon wafers, it will produce ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/956
Inventor 孙毅张孟雷申君来杨正宏徐元清辛玲韩志民高敏杰
Owner HENAN XINDAXIN SCI & TECH
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