Quick leaching method of silicate lead oxide concentrates

Abstract

The invention relates to a quick leaching method of silicate lead oxide concentrates, and belongs to the technical field of beneficiation and metallurgy. The silicate lead oxide concentrates are finely grinded to enable more than 85% of silicate gangue minerals to reach monomer separation; and under the condition of a temperature of 40-60 DEG C, the lead oxide concentrates are added in a leaching agent-methanesulfonic acid water solution for stirring and leaching by 15-30 min to realize efficient and quick leaching of the silicate lead oxide concentrates so as to provide high-quality raw materials to subsequent processes. The method is mild in reaction conditions, simple in technological process, convenient to operate, fast in leaching speed, short in leaching time, low in leaching cost, high in leaching efficiency and excellent in environmental protecting benefit and economic benefit.

Description

technical field [0001] The invention relates to a rapid leaching method of silicate type lead oxide concentrate, and belongs to the technical field of mineral processing metallurgy. Background technique [0002] Lead is an important non-ferrous metal, and its status in the national economic construction is becoming more and more important. Lead mainly exists in the form of sulfide and oxide in nature. Common lead sulfide minerals with industrial mining value are galena, lead oxide minerals are white lead, lead and vanadium, etc. For a long time, lead smelting has always used lead sulfide minerals as raw materials. However, with the continuous consumption of limited lead sulfide resources, lead sulfide minerals can no longer meet the growing demand for lead. In terms of external dependence, the efficient development and utilization of lead oxide ore will become an important way to supplement the supply of lead metal. [0003] At present, the sulfide-xanthate flotation metho...

AI Technical Summary

Problems solved by technology

For a long time, lead smelting has been using lead sulfide minerals as raw materials. However, with the continuous consumption of limited lead sulfide resources, lead sulfide minerals can no longer meet the growing demand for lead. In order to meet the needs of the national economy for lead metal, reduce the lead Due to the degree of dependence on foreign countries, the efficient development and utilization of lead oxide ore will become an important way to supplement the supply of lead metal

[0003] At present, the vulcanization-xanthate flotation method is the main method for enriching lead oxide minerals, but this method has disadvantages such as low vulcanization efficiency, vulcanization products are easy to fall off during stirring, and are easy to "decay" in aerobic or heating systems. At the same time, it is difficult to control the amount of vulcanizing agent in the flotation process of lead oxide ore. Insufficient or excessive amount of vulcanizing agent is unfavorable to the subsequent flotation; in addition, lead oxide ore will dissolve during the flotation process, and the dissolved components will Non-selective activation of gangue minerals such as silicates in the ore; these factors make the flotation concentrate products contain too much gangue minerals and lead grades are low

[0004] For low-grade high-silicon lead oxide concentrates, pyroprocessing has disadvantages such as large amount of waste residue, high energy consumption, high labor intensity, and serious environmental pollution.

Hydrometallurgy has the advantages of low production cost, simple operation, and high metal recovery rate. However, when sulfuric acid and hydrochloric acid are used as leaching agents, lead sulfate and lead chloride precipitates will be formed, and lead nitrate produced by nitric acid and lead oxide minerals is unstable; In addition, there are a lot of silicon-containing gangue minerals in lead oxide concentrate, which is not suitable for alkaline leaching

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