Method for recovering zinc, indium, iron, and lead from high-iron zinc oxide mixture smelted with zinc

Abstract

The invention relates to the field of metal smelting, particularly to a method for recovering zinc, indium, iron, and lead from a high-iron zinc oxide mixture smelted with zinc. The method comprises the following processes: a high-iron zinc oxide mixture neutral leaching process, a neutral leaching residue low acid leaching process, a low acid pressure filter residue peracid leaching process, a low acid leaching liquid prereduction process, and a indium enrichment recycling process; valuable metals are comprehensively recovered from the high-iron zinc oxide mixture; a generated neutral leaching liquid is adopted by a main zinc smelting system to generate electrolytic zinc; a hydrolyzing filter liquor generated from the indium enrichment recycling process contains relatively rich ferrous ions; the hydrolyzing filter liquor is adopted by the main system for removing impurities and generating high-grade indium enrichment residues; therefore, the high-iron zinc oxide mixture is effectively recycled, the problem of high-iron zinc oxide mixture treatment is solved, capability of comprehensive utilization of metal resources is increased, so that resources are comprehensively recycled, and environment protection is facilitated; the method has relatively good economic benefits and social benefits.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a method for recovering zinc, indium, iron and lead from a zinc smelting high-iron zinc oxide mixture. Background technique [0002] In the conventional wet zinc smelting method, the zinc concentrate is first roasted, and then the roasted ore is leached in two stages, and the new solution produced is electrolytic zinc, and the leaching slag of the two stages has a high zinc content, and then enters the rotary kiln to add pulverized coal coke Fuel such as pellets is reduced and roasted to reduce and volatilize valuable metals such as zinc in the two-stage leaching slag, and produce a high-iron zinc oxide. [0003] At present, zinc smelting enterprises carry out two or three-stage leaching of this high-iron zinc oxide mixture, and then use the leaching solution. However, because the leaching slag is not subjected to enhanced leaching, a large amount of iron remains in the leaching sla...

AI Technical Summary

Problems solved by technology

[0003] At present, zinc smelting enterprises carry out two or three-stage leaching of this high-iron zinc oxide mixture, and then use the leaching solution. However, because the leaching slag is not subjected to enhanced leaching, a large amount of iron remains in the leaching slag, because it contains more zinc ferrite, sulfide Metals such as zinc and indium sulfide are lost with the leaching residue, resulting in waste of resources

In the prior art, valuable metals in zinc oxide are studied, leached in ammonia medium, purified, and then electrolyzed to produce electrolytic zinc. The raw materials in the prior art do not have zinc ferrite and sulfide components, so there is no good representative property, and the indium in the raw material cannot be recovered well under ammonia leaching conditions, and the ammonia gas has a great impact on the environment during the leaching process

Images