Flotation agent for extracting silicon carbide micropowder

Abstract

The present invention proposes a flotation agent for silicon carbide micropowder extraction, the raw materials of which include by weight: 50-80 parts of naphthenic acid, 20-40 parts of glycerin, 5-15 parts of diesel oil, 2-8 parts of xylene, alkane 3-8 parts of sodium succinate sulfonate, 2-9 parts of diethylene glycol benzoate, 1-5 parts of octylphenol polyoxyethylene ether, 5-15 parts of methanol, thiazonitrile 8-12 parts, 1-3 parts of isopropyl ethyl thiocarbamate, 3-6 parts of p-benzoquinone dioxime, 5-9 parts of liquid rosin, 2-5 parts of benzoxazole mercaptan, 1- 4 parts, 30-60 parts of water. The recovery rate of silicon carbide is high and the purity of silicon carbide is high.

Description

technical field [0001] The invention relates to a flotation agent, in particular to a flotation agent for silicon carbide micropowder extraction. Background technique [0002] Various silicon wafers, including monocrystalline silicon and polycrystalline silicon solar cells, and silicon wafers for the microelectronics industry, are generally produced by cutting with wire saws and silicon carbide abrasive slurry, referred to as mortar. [0003] The thickness of the silicon wafer is generally 0.22mm, and there is no development trend of thinning at present. The width of the wire saw kerf is generally 0.18-0.30mm, which means that 20-60% of the high-purity silicon material will enter the mortar as sawdust, and its extraction Recycling is equivalent to opening up a new and sizable source of high-purity silicon raw material. [0004] Although the benefits of recovering high-purity silicon are considerable, the physical and chemical properties of silicon and silicon carbide are re...

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Problems solved by technology

[0004] Although the benefits of recovering high-purity silicon are considerable, the physical and chemical properties of silicon and silicon carbide are relatively close. So far, there are fe