Recovering process of valent metal from crude bismuth

Abstract

The invention relates to a crude bismuth metal recovery technology which adopts wet process and pyrogenic process craft to recover the mental. It first dose water quenching, ball milling, extracting, scouring and filtering to the crude bismuth alloy to obtain the antimony lead skim and leaching solution; the antimony lead skim returns to the pyrogenic process system and then to the lead smelt system; it uses spongy copper to displace the Au and Ag of the leaching solution to produce the gold silver earth which returns to the noble metal smelting system; the liquid after displacing the gold silver earth dose hydrolytic precipitation bismuth and uses limestone and water to inactive it to pH=3-3.5, it filters the solution to obtain the bismuth oxide chloride and obtains the crude bismuth by smelting and then obtains the purified bismuth; it uses iron slag to displace the Cu to produce the spongy copper; adding limestone in the liquid after depositing Cu to inactive it and discharges it.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metallurgy, and in particular relates to a process for recovering valuable metals in crude bismuth that comprehensively recovers valuable metals in crude bismuth alloys by using a combined wet method and pyrotechnic process. Background technique [0002] In the process of processing lead anode slime to recover and produce gold and silver, by-product materials such as wet process slag (antimony slag, bismuth slag), pyroprocess slag (primary slag, secondary slag), smoke and dust will be produced. This material mainly contains antimony, bismuth, copper, lead, gold, silver and other valuable metals. Material stacking will pollute the environment, and valuable metals cannot be recovered, and the economic value cannot be reflected. Therefore, the recovery of valuable metals Sb, Bi, etc. in various slags is very important. All kinds of slag are processed by pyrosystem, and the alloy is produced by r...

AI Technical Summary

Problems solved by technology

[0004] 15--30% 25--50% 15--30% 15--30% 15--80g / t 15-30Kg / t of crude bismuth is difficult to sell because the grade of the main metal bismuth is not high, and only Bi, Au, Ag pricing, the price is low, economically uneconomical

However, due to the high impurity content, the direct yield is too low and the processing cost is high when using the traditional pyrotechnic bismuth refining process.

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