Decoloring method for recovering cutting fluids through multilineal cutting

A multi-wire cutting and cutting fluid technology, applied in the direction of lubricating composition, etc., can solve the problems of high recycling cost, difficult to master the processing process, unstable quality of cutting fluid, etc., and achieve low recycling cost, high practical value, economical and social significant effect

Inactive Publication Date: 2011-05-18
XIAN HUAJING ELECTRONICS TECH
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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 multi-wire cutting recycling cutting fluid decolorization method in view of the deficiencies in the above-mentioned prior art. Low, the chroma of the cutting fluid after treatment is less than 15 degrees and all indicators meet the requirements of technical indicators, which can effectively solve the problems of high recycling cost, unstable quality of the cutting fluid after treatment, and difficulty in handling the existing cutting fluid recovery methods. various practical issues

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  • Decoloring method for recovering cutting fluids through multilineal cutting
  • Decoloring method for recovering cutting fluids through multilineal cutting

Examples

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Embodiment 1

[0037] In this embodiment, the recovered 1 ton of colored cutting fluid is heated to 40° C. in the reactor (that is, in the heating device), and fully stirred during the heating process; after that, the heated colored cutting fluid is added with a mass concentration of 10kg of 30% hydrogen peroxide and fully stirred for 10min, so that the hydrogen peroxide oxidatively decomposes the colored substances in the colored cutting fluid, then add 20kg of white clay and fully stirred, and let stand for 30min, so that the oxidized colored material residues are fully adsorbed on the surface of the white clay; Subsequently, the filtrate after the solid-liquid mixture is subjected to the plate and frame pressure filtration of the plate and frame filter press and then successively passes through the filter element to be a melt-blown filter with a pore size of 5 μm, a pleated filter with a pore size of 0.1 μm, and a filter that can reduce the molecular weight. Carry out tertiary filtration f...

Embodiment 2

[0040] In this example, the recovered 2 tons of colored cutting fluid was heated to 60° C. in the reactor (that is, in the heating device), and fully stirred during the heating process; after that, the heated colored cutting fluid was added with a mass concentration of 15kg of 30% hydrogen peroxide and fully stirred for 10min, so that the hydrogen peroxide oxidatively decomposes the colored substances in the colored cutting fluid, then add 40kg of white clay and fully stirred, and let stand for 60min, so that the oxidized colored material residues are fully adsorbed on the surface of the white clay; Subsequently, the filtrate after the solid-liquid mixture is subjected to the plate and frame pressure filtration of the plate and frame filter press and then successively passes through the filter element to be a melt-blown filter with a pore size of 5 μm, a pleated filter with a pore size of 0.1 μm, and a filter that can reduce the molecular weight. Carry out tertiary filtration f...

Embodiment 3

[0042] In this embodiment, the recovered 1 ton of colored cutting fluid is heated to 50° C. in the reactor (that is, in the heating device), and fully stirred during the heating process; after that, the heated colored cutting fluid is added with a mass concentration of 25% hydrogen peroxide 5kg and fully stirred for 15min, so that the hydrogen peroxide oxidatively decomposes the colored substances in the colored cutting fluid, then add 5kg of white clay and fully stirred, and let stand for 70min, so that the oxidized colored material residues are fully adsorbed on the surface of the white clay; Subsequently, the filtrate after the solid-liquid mixture is subjected to the plate and frame pressure filtration of the plate-and-frame filter press and then successively passes through the filter element to be a melt-blown filter element with a pore size of 3 μm, a pleated filter with a pore size of 0.15 μm, and a melt-blown filter with a pore size of 0.15 μm. Carry out tertiary filtra...

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Abstract

The invention discloses a decoloring method for recovering cutting fluids through multilineal cutting, comprising the following steps of: 1, reducing viscosity: heating coloured cutting fluids to 40-75 DEG C; 2, flocculating and decoloring: adding hydrogen peroxide, sufficiently stirring, then adding carclazyte, sufficiently stirring, and then standing so as to obtain a solid-liquid mixture with flocculates; 3, carrying out multistage filtration; 4, carrying out ion exchange processing: removing inorganic foreign ions by adopting an ion exchange column or an ion exchange bed so as to obtain defecated filter liquor with conductivity of less than 5 microseconds / centimeter under the temperature condition of 25 DEG C; and 5, carrying out negative-pressure vacuum distillation. The method has reasonable design, high practical value, good decoloring effect and low recovery cost, adopts simple step, is easy and convenient to operate, ensures that chroma of processed cutting fluids is less than 15 and various indexes all meet the requirements of technical indexes and can solve multiple practical problems of high recovery cost, unstable processed cutting fluid quality, difficult processing procedure mastering, and the like of the traditional cutting fluid recovery method.

Description

technical field [0001] The invention belongs to the technical field of multi-wire cutting recycling cutting fluid processing technology in the field of single crystal or polycrystalline silicon multi-wire cutting, and in particular relates to a multi-wire cutting recycling cutting fluid decolorization method. Background technique [0002] In the photovoltaic industry, the effective recovery and utilization of waste cutting fluid (specifically, multi-wire cutting fluid) is not only beneficial to environmental protection, but also improves the economic benefits of enterprises. From the perspective of recycling, no matter what method is adopted, the recovered cutting fluid must meet the required technical indicators (including viscosity, density, conductivity, moisture, color, pH, etc.). Among the above technical indicators, since chromaticity is the appearance index of the product, it not only directly affects the appearance of the product, but also directly determines whether...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M175/00
Inventor 杨国农贺鹏杨易陈波
Owner XIAN HUAJING ELECTRONICS TECH
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