Comprehensive utilization method of acid sludge generated in acid making by smelting fume

Abstract

The invention provides a comprehensive utilization method of acid sludge generated in acid making by smelting fume. The acid sludge generated in acid making and containing substances such as metal, fluosilicate, selenium, selenium, arsenic and the like is taken as a raw material to prepare sodium fluoride, elementary substance selenium, silicon dioxide hydrate or water glass and arsenic sulfide products; and a material with high metal content is provided for smelting. The comprehensive utilization method breaks through the limitation that only the metal substance can be smelted and extracted in the traditional acid sludge recycling-utilizing mode, maximally recycles fluorine, selenium, arsenic, silicon and metal substances and prepares respective product of the substances, and thoroughly solves the difficult problems that fluorine, selenium and arsenic are easy to volatilize in smelting and extracting of the metal and difficult to recycle and arsenic is difficult to be separated from the metal in a liquid phase method; and extraction and preparation technologies are simple, product diversification is realized, and the utilization degree of economy refining is high. The comprehensive utilization method is wide in application range and applicable to acid sludge generated in acid making by purification of not only nonferrous smelting sulfur-containing fume but also ferrous smelting sulfur-containing fume.

Description

technical field

[0001] The invention belongs to a comprehensive utilization method of acid mud produced by sulfuric acid production by purifying flue gas from metal sulfide mineral smelting, in particular a method for preparing fluorine, selenium, silicon and arsenic products from acid mud in flue gas acid production. Background technique

[0002] With the rapid development of my country's sulfide metal mineral metallurgy industry, the rapid development of sulfur-containing flue gas acid production industry is promoted; and the rapid development of flue gas acid production industry, the multi-source of smelting raw materials and the wet purification of acid production flue gas and acid water The improvement and perfection of the treatment system will bring about an increase in the output of acid mud, an increase in the types of useful substances contained in it, and an increase in the consumption of water glass for flue gas purification. According to detection and analysis, t...

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