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Novel manufacturing technique of recycling monocrystal silicon cutting waste mortar

A technology for cutting waste sand and production process, applied in recycling technology, silicon, products, etc., can solve the problems of increased processing cost, quality change of cutting fluid, etc., and achieves low construction and operation cost, high recovery rate, and simple production process. Effect

Inactive Publication Date: 2017-01-04
合肥耀贝软件开发有限公司
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  • Abstract
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Problems solved by technology

At the same time, the cutting heat generated during the cutting process will also cause qualitative changes in the cutting fluid itself.
Therefore, the cutting fluid must be replaced after several uses, thereby causing an increase in processing costs

Method used

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  • Novel manufacturing technique of recycling monocrystal silicon cutting waste mortar

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing and embodiment the technical scheme of the present invention is further described:

[0015] Such as figure 1 As shown, the new monocrystalline silicon cutting waste mortar recycling production process, the specific steps are as follows:

[0016] (1) After adding a certain amount of water to the monocrystalline silicon cutting waste liquid, mix it in the agitator first, then enter the mixer for mixing reaction, and then use the solid heat separator to heat and separate it to obtain polyethylene glycol mixed liquid, silicon carbide and Crude solid mixture of silicon.

[0017] (2) Add water to the coarse solid mixture of silicon carbide and silicon, and then use the first spray cleaner to clean, remove impurities such as water and residue, and obtain a primary cleaning mixture of silicon carbide and silicon, and then add sulfuric acid to react to obtain silicon carbide and acid Liquid, and then after filtration, alkali washi...

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PUM

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Abstract

The invention discloses a novel manufacturing technique of recycling the monocrystal silicon cutting waste mortar. In the process of recycling the silicon wafer cutting liquid in the waste mortar, silicon carbide micromist and solid monocrystal silicon in the waste mortar are recycled at the same time, and the recovery rate is high. The recycled silicon wafer cutting liquid has the same surface activity, suspension force and carrying force as the new cutting liquid. The process of the manufacturing technique is simple and convenient in operation, short in constructing and operating costs and easy in management, capable of recycling effectively the monocrystal silicon cutting waste mortar.

Description

technical field [0001] The invention relates to a waste mortar reuse production process, in particular to a novel single crystal silicon cutting waste mortar reuse production process. Background technique [0002] For the photovoltaic industry, the recovery of cutting fluid waste mortar with polyethylene glycol as the main raw material has high economic value. [0003] Due to the strict requirements on the surface flatness, cleanliness, conductivity and other performance indicators of solar silicon wafers in application, silicon carbide micropowder with high hardness, small particle size and concentrated particle size distribution needs to be used in the cutting process of solar silicon wafers as the main cutting medium. In order to disperse the silicon carbide micropowder evenly during the cutting process, and take away the huge frictional heat generated during the cutting process in time, it is usually necessary to add the silicon carbide micropowder in a certain proporti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M175/00C01B31/36C01B33/02C08J11/04C08L29/04
CPCC01B33/02C08J11/04C08J2329/04C10M175/0016Y02P20/143Y02W30/62
Inventor 任磊
Owner 合肥耀贝软件开发有限公司
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