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Method for recycling boron carbide in sapphire grinding waste slurry

A technology of boron carbide and sapphire, which is applied in the field of boron carbide recovery and utilization in sapphire waste grinding slurry, can solve the problems of waste materials that can only be discarded, large amount of waste slurry, pressure on enterprises and environmental protection, etc., and achieve low recycling cost, two The effect of less secondary pollution and lower production costs

Active Publication Date: 2014-07-16
烟台同立高科新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for recycling boron carbide in the waste grinding slurry for sapphire, to overcome the large amount of waste slurry produced by sapphire in the prior art, and for enterprises without recycling, the waste can only be discarded. Flaws that cause great stress for business and environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of sapphire of the present invention is used the method for boron carbide recycling in grinding waste slurry, comprises the following steps: step 1, the waste slurry that main component is oily boron carbide grinding fluid and aluminum oxide powder and ethanol are 2 according to mass percentage ratio: 10 mixing and stirring to obtain a suspension, and then performing solid-liquid separation to obtain a primary suspension and a primary solid particle; the main component of the primary solid particle is a mixture of boron carbide powder, aluminum oxide powder and oily organic matter;

[0028] Step 2, adding ethanol to the primary solid particles obtained in step 1, stirring the ethanol and the primary solid particles according to the mass fraction ratio of 2:1 to obtain a suspension, and then performing solid-liquid separation to obtain a secondary suspension and a secondary solid particles; the main components of the secondary solid particles are boron carbide and ...

Embodiment 2

[0038] A method for recycling boron carbide in waste grinding slurry for sapphire of the present invention comprises the following steps: step 1, the waste slurry mainly composed of oily boron carbide grinding fluid and alumina powder and analytical pure grade toluene are mixed according to the mass percentage ratio Mix and stir for 6:10 to obtain a suspension, and then perform solid-liquid separation to obtain a primary suspension and a primary solid particle; the main components of the primary solid particle are boron carbide powder, alumina powder and oily organic matter mixture;

[0039] Step 2, add analytical grade toluene and primary solid particles to the primary solid particles obtained in step 1 and stir according to the mass fraction ratio of 3:1 to obtain a suspension, then carry out solid-liquid separation to obtain secondary suspensions and secondary Solid particles; the main components of the secondary solid particles are boron carbide and alumina powder; after t...

Embodiment 3

[0049] A method for recycling boron carbide in waste grinding slurry for sapphire of the present invention comprises the following steps: step 1, the waste slurry mainly composed of oily boron carbide grinding fluid and alumina powder is mixed with acetone of analytical pure grade and according to mass percentage Mixing and stirring at a ratio of 5:10 to obtain a suspension, followed by solid-liquid separation to obtain a primary suspension and primary solid particles; the main components of the primary solid particles are boron carbide powder, alumina powder and oily organic a mixture of substances;

[0050] Step 2, add acetone to the primary solid particles obtained in step 1, acetone and primary solid particles are stirred according to the mass fraction ratio of 3:1 to obtain a suspension, and then perform solid-liquid separation to obtain a secondary suspension and a secondary solid particles; the main components of the secondary solid particles are boron carbide and alumi...

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Abstract

The invention relates to a method for recycling boron carbide in sapphire grinding waste slurry. The method comprises the following steps: mixing waste slurry and a viscosity reducer according to the mass percent of 2:10-6:10 and stirring to obtain suspending liquid, wherein the grinding solution comprises the main component of oily boron carbide, and then performing solid-liquid separation to obtain primary solid particles; adding the viscosity reducer into the primary solid particles and stirring, and then performing solid-liquid separation to obtain secondary solid particles; adding water into the secondary solid particles and stirring to prepare suspending liquid, then entering an ultrasonic cleaner for cleaning, and performing hydrocyclone separation after cleaning to obtain the alumina powder suspending liquid and the boron carbide suspending liquid; removing iron, and performing centrifugal separation, centrifugal water washing, centrifugal separation, alkali cleaning and centrifugal separation to obtain solid particles; and drying and classifying the solid particles to obtain recyclable boron carbide finally. According to the method, the recovery rate of boron carbide in the sapphire grinding waste slurry can reach more than 80 percent, the recovery cost is low, and the secondary pollution is small, as a result, the method is energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to the invention of a boron carbide waste recycling process, in particular to a method for recycling boron carbide in waste grinding slurry for sapphire. Background technique [0002] Sapphire materials are widely used, such as window materials for infrared military devices, satellite space technology, and high-intensity lasers. It has become the most ideal substrate material for semiconductor GaN / Al2O3 light-emitting diodes (LEDs), large-scale integrated circuits SOI and SOS, and superconducting nanostructure thin films. Used in the semiconductor lighting industry, such as LED, LED can increase the luminous efficiency by nearly 10 times, and the service life is more than 20 times that of traditional lamps, and has the advantages of green and environmental protection. There are only two kinds of substrates currently available for commercialization, namely sapphire and silicon carbide substrates. At present, 80% of LED companies ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/36C01B32/991
Inventor 陈晓光郭大为孙洪亮
Owner 烟台同立高科新材料股份有限公司