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With China's rapid economic development and science and technology continues to progress, gold has become indispensable in people's lives, metallic materials, especially in the application of modern industry and agriculture, aerospace, information technology, electronics industry, new energy materials increasing, This opened up a vast area for the production of gold, and promote the growth of changes in technology and production of gold production. Currently, the characteristics of China's gold resources bonanza, easy to deal with declining or depleted ore and more complex ore, refractory ore and lean ore. Study of refractory ore, the refractory ore pretreatment methods and processes, as well as complex ore recovery technology, has become an important topic of gold production, and has made good progress and the actual effect. Different for different type of gold ore, gold extraction process currently used is gravity separation, flotation and heap leaching, cyanidation, non-cyanide Law, biological oxidation gold extraction process. This thesis is to Yunnan Wenshan a gold mine for research, process mineralogy first test ore samples by phase analysis and chemical analysis to ascertain the kind of test ore mineral composition, the main elements and content, through The analysis of X-ray diffraction and electron microprobe analysis, to ascertain the main mineral ore samples disseminated relations and Gold Occurrence state. Mine kind of material composition and quantitative analysis of the results showed that only 9.74% of the metal sulfide ore sample, mainly pyrite and arsenopyrite. Gold Occurrence analysis showed that the gold is associated with pyrite, so the focus of this study is the recovery of pyrite. The thesis of a gold mine in Wenshan comprehensive test of the system. The choice of the beneficiation methods, respectively flotation and the re-election of comparative tests, and ultimately determine the sorting method using a single flotation process recycling bearing pyrite. Flotation tests were grinding fineness, the type and amount of the activator, the type and amount of dispersant, modifier type and amount of collector type and dosage conditions test, finalized conventional xanthate as the collector II oil as a foaming agent, copper sulfate as the pharmaceutical system activator, sodium hexametaphosphate as a dispersing inhibitors. Concentrate product index closed circuit to determine the grinding fineness of 80% -200 mesh, using a rough two sweep three fine middlings order return to the principles of flow obtained by closed-circuit test: S grade from 4.06% to 40.08% Au grade from 2.00g / t to 17.5g / t S recoveries from 96.03% to 90.59% Au recoveries. Test indicators have reached the desired target. Test ore samples gold is too fine-grained, high grade lead concentrate in gold for further study. The findings of this paper can be used as the gold mine the basis for the preliminary design of the concentrator, has some practical value.
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