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Treatment device and method for high-iron silicon carbide micro-powder

A silicon carbide micropowder and processing method technology, which is applied in the field of high-iron silicon carbide micropowder processing devices, can solve the problems of pollution, long time required, and difficulty in processing high-iron materials, so as to avoid environmental pollution, fully react, and shorten the production cycle Effect

Inactive Publication Date: 2015-03-11
HENAN XINDAXIN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention aims to solve the technical problems in the prior art that the processing of high-iron material generated when magnetic separators are used to remove iron from silicon carbide powder is difficult, takes a long time and causes serious pollution

Method used

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  • Treatment device and method for high-iron silicon carbide micro-powder
  • Treatment device and method for high-iron silicon carbide micro-powder

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: a kind of high-iron silicon carbide micropowder processing device, such as figure 1 , figure 2 As shown, it includes a reaction barrel 1 and an ultrasonic device, the upper part of the reaction barrel 1 is provided with a feed port 2, and the lower part is provided with a discharge port 3, and the ultrasonic device includes at least one ultrasonic oscillator 4 arranged on the outer wall of the reaction barrel 1, And at least one ultrasonic generator 5 arranged outside the reaction barrel 1 , each ultrasonic generator 5 is connected with two ultrasonic oscillators; a stirrer 6 is also arranged in the reaction barrel 1 . Wherein, the ultrasonic generator and the ultrasonic oscillator are connected through a high-frequency line with a socket; the reaction barrel 1 is made of stainless steel.

Embodiment 2

[0028] Embodiment 2: A kind of high-iron silicon carbide micropowder processing device, the difference with embodiment 1 is that a temperature sensor is also arranged in the reaction barrel 1, and a heater is also arranged on the inner wall of the reaction barrel 1 (not shown in the accompanying drawings). draw).

Embodiment 3

[0029] Embodiment 3: a kind of processing method of high-iron silicon carbide micropowder comprises the following steps:

[0030] (1) Mixing: Introduce the high-iron silicon carbide micropowder produced by the magnetic separator into the reaction tank of the high-iron silicon carbide micropowder processing device in Example 2, add hot water at 90°C, stir evenly, and obtain a mass percent concentration of 20 % of slurry;

[0031] (2) Ultrasonic oscillation: Turn on the ultrasonic equipment, and under the condition of ultrasonic frequency of 40KHz, perform ultrasonic oscillation treatment on the slurry in the reaction tank for 30 minutes, and turn on the agitator while performing ultrasonic oscillation treatment, and the material in the reaction tank slurry for stirring;

[0032] (3) Acid leaching: To the slurry obtained in step (2), add an acid accounting for 30% of the slurry volume fraction, and carry out an acid leaching reaction for 5 hours at a reaction temperature of 80°...

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Abstract

The invention discloses a treatment device and method for high-iron silicon carbide micro-powder and aims to solve the technical problems in the prior art that high-iron materials generated when a magnetic separator is adopted to remove iron in silicon carbide micro-powder has high difficulty in treatment, requires a long treatment time and causes serious pollution. The treatment method comprises the steps of material mixing, ultrasonic vibration, pickling and cleaning. The treatment device comprises a reaction bucket and ultrasonic equipment, wherein the ultrasonic equipment comprises at least one supersonic oscillator arranged on the outer wall of the reaction bucket and at least one ultrasonic generator arranged outside the reaction bucket, and each ultrasonic generator is connected with 1-3 supersonic oscillators; a stirrer is also arranged in the reaction bucket. According to the invention, iron impurities in the high-iron materials generated in the silicon carbide micro-powder production process can be effectively removed, and part of superfine particles can also be removed, so that the purpose of efficient recycling of the high-iron materials is achieved, resources are saved and environmental pollution is avoided.

Description

technical field [0001] The invention relates to the technical field of silicon carbide micropowder production, in particular to a treatment device and method for high-iron silicon carbide micropowder. Background technique [0002] Silicon carbide micropowder is a cutting blade used in cutting solar silicon wafers. In the cutting of silicon wafers, the cutting machine has very strict requirements on the cutting edge, and the presence of iron affects the cutting quality of silicon wafers. Therefore, it is necessary to remove it. iron impurities to ensure cutting efficiency and pass rate. In the prior art, magnetic separators are commonly used to remove iron from silicon carbide micropowder, and 5% of the materials and iron powder will be mixed together and discharged as waste materials during the process of magnetic separator iron removal. The content of iron impurities is relatively high, about 5%, and these waste materials are called high-iron materials, that is, high-iron ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/36
Inventor 孙毅陈亚丽徐元清申君来辛玲高敏杰
Owner HENAN XINDAXIN SCI & TECH
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