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Method for treating abrasive particle-containing waste

A technology of abrasive grains and waste materials, which is applied in the field of waste materials containing abrasive grains, can solve problems such as waste, and achieve the effect of purifying and optimizing the surface state of abrasive grains

Active Publication Date: 2020-12-01
LUOYANG CSI PHOTOVOLTAIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to actual investigations, the cost of diamond micropowder accounts for 30%-40% of the production cost of diamond wire at present, and the direct utilization rate of diamond micropowder in production is generally 50%-60%, and there is a lot of waste. Therefore, the recycling of diamond micropowder has become a key factor restricting cost

Method used

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  • Method for treating abrasive particle-containing waste
  • Method for treating abrasive particle-containing waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A method of processing abrasive-containing waste, the method comprising the steps of:

[0062] S1 every 7 days, the upper sand waste slurry (which contains diamond micropowder) is taken out of the upper sand tank, which is a waste solution containing abrasive particles, and the abrasive particles are used to fix the surface of the wire saw to prepare the diamond wire saw. First put it into a container for settling, settling statically for 1 hour, then pour out the upper layer liquid, add water 3 times its volume to the residue, and stir at a speed of 600r / min for 5 minutes to obtain a mixed solution;

[0063] The minimum particle size of the diamond micropowder used for sanding in the upper sand tank is 6 μm, and the maximum particle size is 14 μm. The electroplating conditions carried out in the upper sand tank are: the main salt of the plating solution is nickel sulfamate, and the secondary salt is Nickel chloride, temperature 55 ℃, using sulfamic acid to adjust pH at...

Embodiment 2

[0069] A method for recovering diamond micropowder from the waste of electroplating for preparing diamond wire saw, characterized in that the method comprises the following steps:

[0070] S1 Every 10 days, take out the upper sand waste slurry (which contains diamond micro-powder) from the upper sand tank, put it into a container for settling before use, settling statically for 0.5 hours, then pour out the upper layer liquid and add it to the residue. 5 times its volume of water was stirred at a speed of 500 r / min for 8 minutes to obtain a mixed solution;

[0071] The minimum particle size of the diamond micropowder used for sanding in the upper sand tank is 6 μm, and the maximum particle size is 14 μm. The electroplating conditions carried out in the upper sand tank are: the main salt of the plating solution is nickel sulfamate, and the secondary salt is Nickel chloride, temperature 50 ℃, using sulfamic acid to adjust pH at 4;

[0072] S2 adopts the method of filtration to c...

Embodiment 3

[0081] A method of processing abrasive-containing waste, the method comprising the steps of:

[0082] S1 every 8 days, the upper sand waste slurry (which contains diamond micropowder) is taken out of the upper sand tank, which is a waste solution containing abrasive particles, and the abrasive particles are used to fix the surface of the wire saw to prepare the diamond wire saw. Put it into a container for settling before, settling statically for 0.8 hours, then pour out the upper layer liquid, add water 4 times its volume into the residue, and stir at a speed of 550r / min for 10 minutes to obtain a mixed solution;

[0083] The minimum particle size of the diamond micropowder used for sanding in the upper sand tank is 6 μm, and the maximum particle size is 14 μm. The electroplating conditions carried out in the upper sand tank are: the main salt of the plating solution is nickel sulfamate, and the secondary salt is Nickel chloride, temperature 60 ℃, using sulfamic acid to adjus...

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Abstract

The invention discloses a method for treating abrasive particle-containing waste. The method comprises the following steps: obtaining an abrasive particle-containing waste solution, and fixing abrasive particles on the surface of a fretsaw; filtering out first impurities in the waste solution through a filter screen, and obtaining a first abrasive particle solution, wherein the average particle size of the first impurities is larger than that of the abrasive particles; carrying out ultrasonic treatment on the first abrasive particle solution to peel off second impurities on the surfaces of abrasive particles, and removing the second impurities from the first abrasive particle solution to obtain a second abrasive particle solution; and carrying out surface active treatment on the abrasive particles in the second abrasive particle solution by adopting an active agent, and extracting the abrasive particles. By means of the method, the purpose of purifying and optimizing the surface stateof the diamond can be achieved so that the recycled diamond micro-powder can be reused, the utilization rate is increased, and the sanding capacity and uniformity can be further improved.

Description

technical field [0001] The invention relates to the field of silicon wafer cutting, and relates to a method for processing wastes containing abrasive particles. Background technique [0002] At present, for the silicon wafer cutting industry, due to the advantages of high efficiency, high output and low cost of diamond wire, diamond wire cutting wafers have developed rapidly. Therefore, the demand for electroplated diamond wire in the silicon wafer cutting industry has also greatly increased. Therefore, the main raw material diamond powder produced by electroplated diamond wire is also in short supply. [0003] Diamond micropowder is a very important raw material in the production process of electroplated diamond wire. The properties of diamond micropowder determine the final cutting performance of electroplated diamond wire. Therefore, the treatment of diamond micropowder is very important for the production of electroplated diamond wire. According to the actual investigat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/28C09K3/14
CPCC01B32/28C09K3/1409Y02P70/10
Inventor 张伟娜李飞龙张欢欢
Owner LUOYANG CSI PHOTOVOLTAIC TECH CO LTD
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