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Iron removing purification method for silicon carbide cutting edge material

A purification method and cutting edge technology, applied in the direction of silicon carbide, carbide, etc., can solve the problems of extended production cycle, high production cost, and low production efficiency, and achieve the effects of stable production process, shortened production cycle, and improved production efficiency

Inactive Publication Date: 2014-07-16
HENAN XINDAXIN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pickling and iron removal process of silicon carbide cutting blades will not only produce a large amount of wastewater, which is easy to pollute the environment, but also increase the cost of wastewater treatment for enterprises; moreover, the time required for washing in the pickling process is long, which prolongs the overall production cycle. The production efficiency is low; and the pickling needs to use a large amount of water to dilute the acid water after the acid reaction, the production cost is high, and the waste of water resources is serious

Method used

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  • Iron removing purification method for silicon carbide cutting edge material
  • Iron removing purification method for silicon carbide cutting edge material
  • Iron removing purification method for silicon carbide cutting edge material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Dilute silicon carbide micropowder with a particle size range of 14.00 μm to 4.80 μm after being pulverized by a Raymond mill and water at a concentration of 40% to make slurry, first add water and then feed, and stir for 30 minutes to make the powder Fully mix with water and make 1 ton of pulp in one slurry tank. Then the obtained silicon carbide powder slurry was subjected to vibration treatment for 20 minutes under ultrasonic waves with a frequency of 60 KHz. Then pump the slurry treated by ultrasonic vibration into the feed distributor of the water-type rotary vibrating screen, and remove impurities such as fibers, flocs, hairs, graphite particles, and large silicon carbide powders in the slurry by screening. , where the sieve screen is 363 mesh, and the impurities on the screen are cleaned every 10 hours. Collect the silicon carbide powder slurry after screening and removing impurities into the slurry tank whose vertical position is higher than the inle...

Embodiment 2

[0035] Embodiment 2: adopt the same method as embodiment 1 to carry out iron removal and purification of silicon carbide cutting edge, the difference is that the slurrying concentration is 35%, and the stirring time is 25 minutes; the ultrasonic vibration treatment adopts 50KHz ultrasonic vibration treatment for 30 minute.

Embodiment 3

[0036]Embodiment 3: Carry out iron removal and purification of silicon carbide cutting edge by the same method as in Example 1, the difference is that the ultrasonic vibration treatment adopts 30KHz ultrasonic vibration treatment for 20 minutes; the rotary vibration sieve used is an ultrasonic rotary vibration sieve. During the screening process, ultrasonic vibration is superimposed with low-frequency rotary vibration to realize the effective combination of ultrasonic vibration and vibrating screen, which can make the materials in the slurry more dispersed, further accelerate the separation of agglomerates, and prevent mesh clogging, realizing Better screening effect.

[0037] Unless otherwise specified, the instruments and equipment involved in the above examples are conventional instruments and equipment; the involved industrial raw materials are commercially available conventional industrial raw materials unless otherwise specified.

[0038] The iron removal efficiency of t...

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Abstract

The present invention discloses an iron removing purification method for a silicon carbide cutting edge material. A purpose of the present invention is to solve the technical problems of high cost, low efficiency and easy environmental pollution of the existing iron removing purification method for the silicon carbide cutting edge material. The method comprises: mixing silicon carbide micro-powder crushed through a Raymond crusher and water to prepare a slurry, carrying out an ultrasonic wave vibration treatment on the obtained silicon carbide powder slurry, screening with a rotation vibration sieve, and sequentially introducing the obtained slurry into two stages of electromagnetic iron-removing devices connected in series to remove iron impurities so as to obtain the purified silicon carbide powder slurry. According to the present invention, the silicon carbide cutting edge material product purified by using the method can meet industry technology standards, and characteristics of stable production process, substantial production period shortening, production efficiency increase, environmental protection and energy saving are provided.

Description

technical field [0001] The invention relates to the technical field of production of silicon carbide cutting blades, in particular to a method for removing iron and purifying silicon carbide cutting blades. Background technique [0002] Silicon carbide has high hardness, chemical stability and certain toughness, and is widely used in the manufacture of bonded abrasives, coated abrasives and free grinding technology. With the increasing demand for cutting edge material for solar crystal silicon wafers in the photovoltaic market, the quality requirements for silicon carbide cutting edge material are significantly improved, and the purity requirements for silicon carbide micropowder are also getting higher and higher. Therefore, the preparation process of silicon carbide cutting edge material The purification in the process has become an important production process. After silicon carbide is smelted into large crystal blocks, iron impurities will be introduced in the subsequen...

Claims

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Application Information

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IPC IPC(8): C01B31/36C01B32/956
Inventor 宋中学李春孝刘明磊杨亚坤
Owner HENAN XINDAXIN SCI & TECH
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