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With the development and utilization of mineral resources, single ores that are easy to be separated are becoming less and less, and the comprehensive recovery of complex and difficult-to-select polymetallic mineral resources is receiving more and more attention. Zinc-tin polymetallic sulfide ore is one of them. Due to its complex composition, it is difficult to obtain a good recovery effect with a single process. It is usually necessary to use a combined process such as flotation, magnetic separation, electrostatic separation, and gravity separation to separate useful minerals. This article will introduce two methods for extracting zinc and tin from zinc-tin polymetallic sulfide ores to help you reasonably and effectively recover zinc and tin from such ores.
A set of magnetic separation-flotation-gravity separation combined process flow has been developed for zinc-tin polymetallic sulfide ores with symbiotic iron-containing minerals (magnetite) and sulfur-containing minerals (pyrrhotite, pyrite). The process first uses weak magnetic separation to remove iron minerals, and then removes sulfides through strong magnetic separation, creating favorable conditions for subsequent zinc-tin separation. In the zinc flotation process, lime is used as a pyrite inhibitor, copper sulfate is used as a sulfide ore activator, and butyl xanthate (collector) and pine oil (foaming agent) are used for flotation separation. The specific process includes: one magnetic separation to remove iron, one magnetic separation to desulfurize, followed by two roughing, one scavenging and three fine separations to obtain zinc concentrate. Finally, tin minerals are recovered by shaking table gravity separation to achieve efficient separation and enrichment of zinc and tin. This process effectively solves the separation problem of complex polymetallic sulfide ores and provides a technical reference for the beneficiation of similar ores.
The process adopts flotation, magnetic separation and gravity separation, and flotation prioritizes zinc and then gravity selects tin ore, that is, priority zinc-desulfurization-iron removal-tin gravity separation process. Lime is used to inhibit pyrite, copper sulfate is used as a sulfide ore activator, butyl xanthate is used as a sulfide ore collector, and pine oil is used as a foaming agent to carry out two rough and three refined zinc, one rough desulfurization, and one magnetic separation. Zinc and tin concentrates can be obtained by separating iron and tin on a shaking table.
The above are two process flows that can be used for zinc-tin separation in zinc-tin polymetallic sulfide ores. Different zinc-tin ores use different beneficiation processes. When selecting a specific zinc-tin separation process, beneficiation tests are essential. In order to avoid wasting precious ore resources and obtain higher economic benefits, please do not blindly copy or make your own decisions. It is recommended to refer to the results of the beneficiation test and combine the actual situation of the beneficiation plant to scientifically and rationally customize the process flow.