Method for simplifying zinc hydrometallurgy process

Abstract

The invention discloses a method for simplifying a zinc hydrometallurgy process. The method includes the steps that firstly, neutral leaching is conducted on zinc roasted ore so as to obtain neutral leaching liquid and neutral leaching residues; secondly, the neutral leaching residues obtained in the first step are added into acid-containing waste liquid, hot acid leaching is conducted, and acid leaching liquid and acid leaching residues are obtained; thirdly, the acid leaching residues obtained in the second step and ZnS concentrate are added into acid-containing waste liquid, reduction leaching is conducted, and liquid after reduction and reduction residues are obtained; fourthly, zinc roasted ore serving as a neutralizer is added into the liquid after reduction obtained in the third step, neutralizing residues and neutralizing liquid are obtained, and the neutralizing residues are returned to the second step to be subjected to hot acid leaching; fifthly, the reduction residues obtained in the third step are added into the acid leaching liquid obtained in the second step, oxidizing leaching is conducted, oxidizing leaching liquid and lead-silver-sulfide residues are obtained, and the oxidizing leaching liquid is returned to the third step to be subjected to reduction leaching; and sixthly, the neutralizing liquid obtained in the fourth step is added into the zinc roasted ore, iron precipitation with goethite is conducted, and liquid after iron precipitation and goethite residues are obtained.

Description

technical field [0001] The invention relates to the field of nonferrous metallurgy industry, in particular to a method for simplifying the hydrometallurgy process. Background technique [0002] Hydrometallurgical zinc leaching processes include roasted ore conventional leaching process, roasted ore thermal acid leaching process, and zinc sulfide concentrate oxygen pressure leaching process. The proportion of zinc smelting slag treatment cost in the zinc smelting cost is gradually increasing. The existing above-mentioned processes all have problems such as long process flow, low recovery rate, high slag treatment cost, and potential environmental protection hazards. [0003] Therefore, the prior art still needs to be improved and developed. Contents of the invention [0004] In view of the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a method for simplifying the zinc hydrometallurgy process, aiming at solving the problem...

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Problems solved by technology

[0004] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a method for simplifying the zinc hydrometallurgy process, which aims to solve the problems of long process flow, low recovery rate, high slag treatment cost, and potential environmental protection hazards in the existing process

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