Beneficiation method for comprehensively reclaiming complex multi-metal micro-grain cassiterite sulphide ore

Abstract

The invention relates to a beneficiation method for comprehensively reclaiming complex multimetal micro-grain cassiterite sulphide ore by adopting a magnetic separation-flotation combined technology. According to the dissemination characteristics of the ore, more than 95% of the ore is ground to be -200 mesh at first, and then magnetic mineral in the ore is removed through high-gradient magnetic separation; according to the flotability difference of the mineral, sulphide ore flotation is performed on the magnetic separation tailings, and follow-up beneficiation is performed on the flotation concentrate to obtain copper and zinc concentrate reaching the sale standard; cassiterite flotation is performed on the flotation tailings, and through the adoption of a combined restrainer (sodium carboxymethyl cellulose and sodium silicate) and a hydroximic acid-type collector, and control over the flotation temperature and the reagent action time in the flotation process, tin concentrate of which the grade and recovery rate are higher than 40% can be obtained. Through the adoption of the technological process, the consumption of flotation reagents (especially tin flotation reagent) is lowered greatly; cassiterite flotation and sulphide ore flotation are separated, so that the stability of the flotation results can be ensured, and the achievement of automatic control over the process is facilitated; all metal is utilized comprehensively, which conforms to the national condition of resource shortage in our country.

Description

technical field [0001] The invention belongs to the field of polymetallic ore beneficiation, and in particular relates to a method for beneficiating complex polymetallic fine-grained cassiterite sulfide ore. Background technique [0002] There are two main forms of cassiterite in fine-grained cassiterite sulfide ore: one is the sulfide-type cassiterite in "green rock", with a particle size of 0.005mm-0.037mm; the other is vein-like and veinlet-like Lithophile-like cassiterite, mainly associated with mica-quartz schist, with a particle size of 0.017mm-0.1mm. In addition, such ores are often associated with chalcopyrite (0.015mm-0.1mm in particle size), sphalerite (0.02mm-0.1mm in particle size), arsenopyrite, pyrrhotite, etc. [0003] The separation of tin ore mainly adopts different methods according to its different properties: the recovery of coarse cassiterite mainly adopts the gravity separation (shaking table, dense medium mineral processing) process, which is simple, ...

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Problems solved by technology

[0003] The separation of tin ore mainly adopts different methods according to its different properties: the recovery of coarse cassiterite mainly adopts the gravity separation (shaking table, dense medium mineral processing) process, which is simple, low in cost and less polluting to the environment However, with the increase of mining efforts in recent years, my country's tin ore resources have gradually shown the characteristics of low ore grade, fine particle size and complex

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