Separation regeneration production process of cutting waste mortar by silicon wafer line
A production process and waste mortar technology, applied in the solar photovoltaic field, can solve the problems of unstable finished product quality, low recycling ratio, and large waste water volume, and achieve the effects of good consistency, high recycling ratio, and water saving
Inactive Publication Date: 2012-12-05
吕镇山 +1
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Problems solved by technology
The defects of this method are: high cost, large amount of pollution, waste water, unstable quality of the finished product
The disadvantages of this method are: high cost, complex process, low recovery ratio, and only cutting fluid recovery
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[0017] In the embodiment, the production process of separation and regeneration of waste mortar for wire cutting of silicon wafers, the separation and regeneration of waste mortar realizes secondary separation through two centrifuges installed on the cutting site, and realizes the regeneration of mortar on site. The centrifuge is a horizontal screw discharge sedimentation centrifuge produced by Zibo Jinghong Machinery Manufacturing Co., Ltd., the model is LW355A or LW355B. It can also be used by Zhejiang Lishui Hengli Centrifugal Machinery Equipment Co., Ltd., Zhangjiagang Shengfeng Pharmaceutical Machinery Factory or The horizontal screw discharge sedimentation centrifuge produced by Shanghai Chemical Machinery Factory Co., Ltd.
[0018] The separation and regeneration of waste mortar includes a separation step and a regeneration step, and the separation step includes:
[0019] (1) Under normal temperature and pressure, the used silicon wafer wire-cutting waste mortar is filt...
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The invention discloses a separation regeneration production process of cutting waste mortar by a silicon wafer line, comprising a separation step and a regeneration step. Under the condition of normal temperature and normal pressure, waste mortar is placed into a centrifugal machine for primary separation to obtain silicon carbide micro-powders with particle diameter more than 8 mums and the remaining waste mortar, wherein a main engine frequency of the centrifugal machine is controlled at 17.5+ / -0.5 HZ, an auxiliary engine frequency is controlled at 6 HZ; and the remaining waste mortar after the primary separation is placed into the centrifugal machine for secondary separation to obtain a cutting fluid and an impurity, wherein the main engine frequency of the centrifugal machine is controlled at 38 + / - 0.5 HZ, a separation factor is 1,550, the auxiliary engine frequency is controlled at 22HZ, and water or other ingredients are unnecessarily added in the separation process, therefore, water is saved, only the waste mortar per se is necessarily treated, the cost is lowered and the emission is reduced, and the separation regeneration production process has favorable separation effect and high recycling ratio.
Description
technical field [0001] The invention relates to a silicon carbide micropowder grinding material and cutting fluid, in particular to a separation and regeneration production process of silicon wafer wire cutting waste mortar, which belongs to the technical field of solar photovoltaic. Background technique [0002] The waste mortar after cutting silicon wafers contains cutting fluid, silicon carbide, silicon powder and iron. The content of silicon powder is about 13%, and the content of iron is about 1%. The content is about 10-15%, which increases the viscosity of the waste mortar, and the waste mortar cannot be used continuously, only scrapped or stored. [0003] At present, the recycling of domestic waste mortar mainly adopts the offline recycling process, which has a long process flow, a large area, a large investment in plant equipment, a high recycling cost, a large water consumption, a large amount of dust and peculiar smell on the production site, and serious environme...
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Inventor 吕镇山陈千钧
Owner 吕镇山