Yunnan Tin Stone - Sulfide Ore Beneficiation Pilot Study

Zhere are plenty of tin ores in China, Cassiterite-sulfide ore reserves are larger, and now also mostly mined cassiterite-sulfide ore. Cassiterite-sulfide ore of many types and associated minerals useful for many kinds of comprehensive utilization of high-value, has higher economic value and the scholarly research value.In this paper, in a place of Yunnan, mainly work is to do experimental research and process analysis study on cassiterite-sulfide ore based on the different processes:mineralogy and other properties of the process, examined the effective process to improve the recovery rate, as well as to explore the process to improve the recovery rate of effective measures.Because in the ore, the constitution of tinstone aggregate mainly by the tinstone monomer, the aggregate granularity is not big.When in the rubbing process, the aggregate comes out, also easy to create he dissociation in interior between the tinstone aggregate and tinstone monomert, finally creates the tinstone monomer granularity is extremely thin after the dissociation, its granularity and tinstone monomer granularity basic consistent; In the ore includes many kinds of metallic elements, like copper, lead, zinc and so on, harmful element arsenic. This ore belongs the tinstone-sulphide ore which difficultly to choose.The main method dressing of tinstone is the gravity separation, this main study is separates by gravity primarily in this article. The first explores carries on the table to separate by gravity and the graduation directly enters the table classification experiment by different rubbing granularity. Because the ore has massive sulfide existence and tinstone brittle characteristic, influenced tinstone recycling seriously. According to the ore nature, the experiment determined that uses the union flow:floats gravity separation, the flotation process desulphurization may cause the tin to concentrate in the flotation tailings, such sulfide may reduce the fluence to the table gravity separation, but as a result of the compact paragenesis relations in tinstone and the sulphide ore, caused part of tin loss the flotation process froth, this part of tin should consider the recycling in present's research work.The main attack direction in this research is the tailings after flotation process. Passes through the stage elects and grades enters the table classification in tailings, the tin personal status and the returns-ratio have the distinct enhancement, the findings indicated:(1) Separates by gravity is the main method to classifies this ore, but the sulfide influence the gravity separation is very serious;(2) selected by rough grinding, can take takes early, can lose loses early, multi-product mix. Leaves the sulfide mineral is the efficient path to advance enhances the tin concentrate personal status and the returns-ratio, the simplification technical process, and reduces the production cost;(3)The target of this tinstone-sulphide ore uses the rough grinding flotation process desulphurization-flotation tailings graduation to enter the table classification flow to be good:The crude ore content tin 2.34%, deliver the tin concentrate content tin 30.14%, tin returns-ratio 39.56%; Rich middling content tin 4.77%, tin returns-ratio 22.74%; Poor middling content tin 2.2%, tin returns-ratio 20.84%, therefore three rank's products recycle tin 83.14% altogether.(4) the fine grain inlays of tinstone is the primary factor affects the returns-ratio, to further raise the returns-ratio, simultaneously obtains the high grade tin concentrate, the following work should place emphasis with the recycling in fine grain tinstone.