Pretreatment and leaching process of flotation zinc oxide concentrate

Abstract

A pretreatment leaching process of flotation zinc oxide concentrates includes the following steps that a small amount of concentrated sulfuric acid is added into the flotation zinc oxide concentrates and stirred evenly; heat-preservation curing is carried out on obtained mineral powder at a low temperature to partially decompose flotation chemicals on the surface of the flotation zinc oxide concentrates; the obtained clinkers are leached out with waste electrolytes, filtered and separated; and finally, a small amount of active carbon is added into the zinc sulfate solution obtained after filtering and separation for adsorption, filtering and separation are carried out again, and zinc oxide concentrate leachate is obtained. The pretreatment leaching process of flotation zinc oxide concentrates has the advantages of being simple, environmentally friendly and the like, can optimize the leaching conditions of the concentrates, and resolves the problems of residual floatation chemicals and the like.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a hydrometallurgical process for flotation zinc oxide concentrate. Background technique [0002] Zinc is an important non-ferrous metal raw material. At present, zinc is second only to copper and aluminum in the consumption of non-ferrous metals. Zinc metal has good calenderability, wear resistance and corrosion resistance. Zinc and many metals can form various alloys with excellent properties. The most important ones are brass made of zinc and copper, tin, lead, etc., which are used in the machinery manufacturing industry; die-casting alloys made of zinc, aluminum, magnesium, copper, etc., used to make various precision castings; steel and various cast iron surfaces Galvanizing can prevent corrosion, and zinc-containing spray materials and various anti-corrosion materials have been widely used; zinc processed materials are the main materials for manufacturin...

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Problems solved by technology

[0004] At present, the drug removal schemes of zinc factories at home and abroad are mainly mechanical drug removal methods, including regrinding, stirring, filtration and washing, multiple selections, etc. These methods are not thorough in drug removal, high in cost, and limited in effect

[0005] CN1733948A Chinese patent document discloses "flotation zinc oxide concentrate wet smelting process", in the leaching process, a mixture of permanganate and tetravalent manganese ions is added to solve the problem of foam layer and flotation reagent residue, but it introduces New impurities are added, and the equipment is severely corroded

Non-patent literature discloses " concentrated acid ripening leaching of zinc in ore " (Fan Bin " hydrometallurgy ", the 3rd period of 1999, P60-P62), although this technology also adopted the method for ripening to leach zinc in ore, but The raw material is zinc oxide concentrate, and the waste acid of electrolysis cannot be used, and the acid is difficult to balance

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