Technological method for recovering lead from copper smelting smoke dust

Abstract

The invention discloses a technological method for recovering lead from copper smelting smoke dust. According to the adopted main technological procedure, the copper smelting smoke dust is sequentially subjected to water-slurrying leaching, blast furnace smelting, lead alloy fire refining, lead alloy electrolysis and alkaline fusion lead extracting, and finally, a lead ingot is prepared. Accordingto the technology, the waste copper smelting smoke dust is adopted as a raw material, and the advantage of increasing of the resource utilization rate is achieved; in the smelting process, a circulating system is adopted, resource comprehensive utilization is achieved, and the resource is saved; and through an alkaline fusion lead extracting method, the complex procedure of subsequent treatment of a traditional method is omitted, the extracting cost is reduced, and the lead extracting efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, relates to the field of lead extraction, in particular to a process method for recovering lead from copper smelting smoke and dust. Background technique [0002] Copper converter fumes produced by copper smelters contain various valuable metals such as copper, lead, zinc, bismuth, arsenic, silver, and antimony. Due to the high content of arsenic in the smoke, it is not only harmful to production, but also pollutes the environment. For a period of time, it was once a waste and environmental protection burden, and it was rarely paid attention to and utilized. In the early 1990s, due to the gradual shortage of lead resources, this material attracted people's attention. In addition, the scattered metal bismuth contained in the material was expensive in the market, so methods for processing this material were born one after another all over the country. Some use crucible boilers, cupolas, ope...

AI Technical Summary

Problems solved by technology

Pyromelting, only the reverberatory furnace has a better effect; although the recovery rate of hydrometallurgy is relatively high, the process is long and the recovery cost is high. In addition, there are environmental problems, and it is not the best process for processing this material.

[0003] Several common forms of lead in smoke and dust are: lead sulfate, lead chloride, basic lead carbonate, lead sulfide, lead oxide, etc. At present, the traditional methods of extracting lead have been improved, such as wet leaching and electrolysis In combination, as the Chinese Patent Publication No. CN103088214A discloses a method of extracting lead from lead slag using alkali leaching and electrowinning, the method cost is lower than the fire process, and the lead yield can reach more than 90%, and it is aimed at different The composition and lead slag of different grades are acceptable, but this method needs causticizing treatment in the follow-up, which is easy to cause environmental pollution and increase the extraction cost