Method for potential-controlled separation and recovery of base metals in precious antimony

Abstract

The invention relates to a method for potential-controlled separation and recovery of base metals in precious antimony. The method comprises the steps of smashing and grinding the precious antimony to a required particle size; adding hydrogen peroxide into a pure hydrochloric acid system and carrying out potential-controlled oxidation leaching; adding copper powder into slurry and carrying out potential-controlled replacement; cooling the replaced liquid, crystallizing and separating out lead chloride; simultaneously adding sodium hydroxide and water into the lead-removed liquid and carrying out neutralization-hydrolysis to separate out antimony oxide; adding sodium sulfide into the antimony-removed liquid and carrying out potential-controlled copper precipitation to separate out copper sulfide; adding the sodium hydroxide and the sodium sulfide into the copper-removed liquid and carrying out potential-controlled nickel precipitation to separate out nickel sulfide; and discharging the up-to-standard nickel-removed liquid. The essence of method disclosed by the invention is that the effective removing and stepwise recovery of the base metals in the precious antimony are realized in the potential controlling way; and the purpose that the four processes of oxidation leaching, replacement, copper precipitation and nickel precipitation are adjustable and controllable is realized. The method has the advantages that the technical index in the technical processes is stable; the labour intensity is low; the production cost is low and the like.

Description

technical field [0001] The invention relates to a precious metal extraction metallurgical process in the field of nonferrous metallurgy, in particular to a hydrometallurgical method for effectively adopting a potential control method to separate rich and noble antimony and recover base metals. Background technique [0002] Gold is a rare strategic metal widely used in gold jewelry, currency reserves and high-tech industries. According to U.S. Geological Survey data, the world's identified gold resources are 89,000 tons, of which about 1 / 3 of the gold resources are refractory ores. In 2015, the global gold output was 3,211 tons, accounting for more than 1 / 3 of the gold output. Produced from refractory gold mines, the proportion is still increasing with the increasing consumption of high-quality resources. [0003] Geochemical studies have shown (①Nie Shuren, Suo Yourui. Gold leaching from refractory metallurgical ores [M]. Beijing: Geological Press, 1997), in the process of ...

AI Technical Summary

Problems solved by technology

[0008] Although the potential-controlled chlorination leaching process effectively improves the metal recovery rate, the silver dispersion phenomenon is serious and the recovery rate is low in the process of the treatment process, and the silver is mainly dispersed in the leaching slag, lead chloride and hydrolysis slag; in addition, the potential-controlled There are many types of impurity metals in the chlorinated leach solution. After neutralization and hydrolysis are usually used to recover antimony oxide, the solution after antimony removal is then neutralized with sodium carbonate to produce mixed slag. The separation effect of valuable metals is poor.

Images