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Method and product for recovering and reusing diamond

A diamond and sapphire technology, which is applied in the field of diamond recycling and reuse, can solve the problems of waste, diamond particles cannot be recycled, etc., and achieve the effect of simple process, eliminating hidden dangers of combustion, and high particle purity

Active Publication Date: 2019-02-22
BEIJING GRISH HITECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the follow-up treatment of the grinding waste slurry in the existing technology, only some boron carbide particles with low value in the front-end processing of sapphire can be recovered through complicated processes, while the diamond particles with higher value in the subsequent processing cannot be recovered basically. Can only be wasted in the subsequent waste treatment process

Method used

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  • Method and product for recovering and reusing diamond
  • Method and product for recovering and reusing diamond

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] A method for reclaiming diamond from sapphire grinding waste slurry, comprising the steps of:

[0086] (1) Use a three-legged centrifuge to centrifugally deoil the collected grinding waste to obtain a centrifugal bottom material; the resulting centrifugal bottom material contains polycrystalline diamond, copper powder, phenolic resin, aluminum oxide, organic solvents, etc.;

[0087] (2) The centrifuge base material obtained in step (1) is vacuum-dried in a vacuum drying oven, the drying temperature is 100°C, the vacuum degree is -0.005MPa, and the drying time is 8h;

[0088](3) pulverize the dried material obtained in step (2) using a pulverizer; the pulverized material contains polycrystalline diamond, copper powder, phenolic resin, aluminum oxide, etc.;

[0089] (4) Put the pulverized material of step (3) into the quartz reactor, add the sulfuric acid solution with a concentration of 75wt%, the mass ratio of the material to the sulfuric acid solution is 1:30, and the ...

Embodiment 2

[0099] A method for reclaiming diamond from sapphire grinding waste slurry, comprising the steps of:

[0100] (1) Use a three-legged centrifuge to centrifugally deoil the collected grinding waste to obtain a centrifugal bottom material; the resulting centrifugal bottom material contains polycrystalline diamond, copper powder, phenolic resin, aluminum oxide, organic solvents, etc.;

[0101] (2) The centrifuge base material obtained in step (1) is vacuum-dried in a vacuum drying oven, the drying temperature is 500°C, the vacuum degree is -0.08MPa, and the drying time is 2h;

[0102] (3) pulverize the dried material obtained in step (2) using a pulverizer; the pulverized material contains polycrystalline diamond, copper powder, phenolic resin, aluminum oxide, etc.;

[0103] (4) Put the pulverized material of step (3) into the quartz reactor, add the sulfuric acid solution with a concentration of 90wt%, the mass ratio of the material to the sulfuric acid solution is 2:30, and the ...

Embodiment 3

[0113] A method for reclaiming diamond from sapphire grinding waste slurry, comprising the steps of:

[0114] (1) Use a three-legged centrifuge to centrifugally deoil the collected grinding waste to obtain a centrifugal bottom material; the resulting centrifugal bottom material contains polycrystalline diamond, copper powder, phenolic resin, aluminum oxide, organic solvents, etc.;

[0115] (2) The centrifuge base material obtained in step (1) is vacuum-dried in a vacuum drying oven, the drying temperature is 200°C, more preferably 240°C, the vacuum degree is -0.1MPa, and the drying time is 4h;

[0116] (3) pulverize the dried material obtained in step (2) using a pulverizer; the pulverized material contains polycrystalline diamond, copper powder, phenolic resin, aluminum oxide, etc.;

[0117] (4) Put the pulverized material of step (3) into the quartz reactor, add the sulfuric acid solution with a concentration of 80wt%, the mass ratio of the material to the sulfuric acid solu...

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Abstract

The invention provides a diamond recovery and reutilization method and a product of the method. The method is simple in procedures, can recover diamonds from sapphire grinding waste slurry, and does not damage the properties of the diamonds, thereby reutilizing the diamond, greatly enhancing the efficiency and reducing the hazardous waste generated in the saponifying step and petroleum ether cleaning. The method does not increase additional hazardous waste products, and thus, is more environment-friendly and prevents the hidden danger of material combustion in the drying step. The diamond powder particles have high purity, can be reutilized, and can effectively lower the cost of the sapphire grinding processing technique.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a diamond recovery and reuse method and product. Background technique [0002] Sapphire, mineral name corundum, trigonal crystal. Sapphire used in industry is a single crystal of aluminum oxide (α-Al 2 o 3 ), its Mohs hardness reaches 9.0, second only to diamond. The special lattice structure of sapphire also determines its excellent physical properties and chemical stability, such as excellent thermal conductivity, excellent electrical insulation and light transmission, high temperature resistance, high strength, high hardness, etc. Wait. Therefore, sapphire is widely used as a window material for infrared military devices, missiles, submarines, high-power strong lasers, etc. And because the C-plane of sapphire has a small mismatch rate with the lattice constant of GaN single crystal film, and at the same time meets the requirements of high temperature resistance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/28C09G1/02
CPCC09G1/02
Inventor 王永豪张振星郑宝山胡晓刚
Owner BEIJING GRISH HITECH
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