In view of the characteristics of high pyrite content,low grade of copper and zinc(Cu 0.11%,Zn 0.22%),par-tial gold in sulfide ore intergrain gold and fissure gold,and many species of silver ore in a foreign gold ore.The new com-bined technology of mineral processing and metallurgy,which is"nelson gravity separation-preferential flotation of copper-all sulfur mixed floating tail-fine grinding and leaching of all sulfur concentrate-zinc separation from cyanide slag",was been adopted.Rapid extraction of gold and silver minerals by green classification and efficient comprehensive recovery of as-sociated low-grade copper and zinc minerals were realized.The whole process test of mineral processing and metallurgy has obtained technical indicators.The total recovery rate is as follows:Au 91.0%,Ag 77.3%,Cu 77.5%,Zn 63.2%,gravity concentrate Au and Ag grade of 41 523.71 g/t,13 763.36 g/t,copper concentrate Au,Ag and Cu grade of 400.8 g/t,5 429.00 g/t,21.19%,zinc concentrate contains Zn grade of 35.33%,the yield of total sulfur mixed floating tailings was 74.6%.
gold and silver oreassociated low grade copper zincnelson recastjoint selection and metallurgypreferen-tial flotation of copper and sulfur
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