Separation and recovery system and separation and recovery method of carbonized silica fume waste

Abstract

The invention discloses a separation and recovery system and a separation and recovery method of carbonized silica fume waste. The separation and recovery system comprises a mixing barrel, a settlingtank, an evaporation tank, a condensing tower, a solvent tank, a crude oil tank and a sand storage barrel; a separation raw material is obtained by mixing carbonized silica fume and mineral oil in themixing barrel; the separation raw material is sent into the leaching settling tank; a leaching solvent in the solvent tank is sent into the settling tank and is mixed with the separation raw materials; after the carbonized silica fume is precipitated, the mixing liquor on the carbonized silica fume precipitate in the leaching settling tank is pumped out and pumped into the evaporation tank; the solvent is evaporated in the evaporation tank; then the obtained steam is condensed in the condensing tower and conveyed into the solvent tank for storing the solvent; after the solvent in the evaporation tank is completely evaporated, the remained mineral oil is conveyed in the crude oil tank for storage; and the carbonized silica fume in the leaching settling tank is completely precipitated and separated, and then conveyed into the sand storage barrel for storage. The system and method provided by the invention can effectively separate the carbonized silica fume and the mineral oil, and the recycling of the leaching solvent and zero emission of pollutants during the production process can be achieved.

Description

technical field [0001] The invention relates to the technical field of recycling magnetic metal waste, in particular to a separation and recovery system and method for silicon carbide micro-powder waste. Background technique [0002] In the photovoltaic and rare earth industries, during the cutting process of the CNC multi-wire cutting machine, the particle size of the silicon carbide powder will be broken and smaller after repeated cutting and grinding, resulting in a decrease in cutting efficiency and quality. Finally, it has to be discharged together with the suspended mineral oil, resulting in a large amount of waste mixed with silicon carbide micropowder, mineral oil and impurities that cannot be treated in an environmentally friendly manner. [0003] The existing traditional treatment technology for silicon carbide waste is: pickling and alkali washing the mineral oil-containing silicon carbide micropowder after screening impurities. However, this treatment technology...

AI Technical Summary

Problems solved by technology

However, this treatment technology needs to use a large amount of acid and alkali in the treatment process, and the treatment cost is relatively high, and it will cause waste of resources and environmental pollution.

And after the treatment, the mineral oil contained in the silicon carbide waste is also destroyed, so it is impossible to recycle the mineral oil

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