Mineralogy and Mineral Separation Experiment of the JiuYi Mountain W-Sn Deposit in Hunan

The JiuYi Mountains area W-Sn deposit is belong to greisen and low-grade ore-type in Hunan.Studies on deposit composition and mode of occurrence of tin and ore-dressing process,the results shown that the 96.24 % of tin total amount consist in cassiterite,and the cassiterite mainly exist among or interior of metasomatic mineral grains,and the grain size of cassiterite generally less than 2 mm,and the cassiterite is no obvious concentrated acconding to the grain size,and the cassiterite is easy to dissociation.In grinding,shaking sorting and flotation process,the recovery rate of tin in this area can reach over 80%.These results provides an important basic research data and and economically viable beneficiation process for regional deposit development.