湖南某钼铋多金属矿选矿试验研究

湖南某多金属矿含钼0.07%，含铋0.17%。矿石中钼主要以硫化钼形式存在，铋主要以硫化铋形式存在，其次为自然铋，硫化钼占总钼的95.04%，硫化铋占总铋的68.42%，自然铋占总铋的21.64%。为确定矿石钼铋合理回收工艺，进行了选矿试验。结果表明，在磨矿细度为-0.074 mm占90%条件下，以水玻璃为抑制剂、BK205为捕收剂经1粗3精2扫钼铋等可浮选，钼铋混合精矿以硫化钠为抑制剂、水玻璃为分散剂、煤油为捕收剂经1粗4精2扫钼铋分离浮选，选钼粗精矿以硫酸为pH调整剂、水玻璃为分散剂、SN-9为捕收剂经1粗2精2扫脱硅浮选，获得了钼精矿钼品位48.22%、回收率81.07%，脱硅铋精矿铋品位52.12%、铋回收率58.37%，铋中矿铋品位2.62%、回收率3.23%的良好浮选指标。

Experimental Study on a Molybdenum-bismuth Polymetallic Ore in Hunan Province

A polymetallic ore in Hunan contains 0.07% molybdenum and 0.17% bismuth. The molybdenum in the ore mainly exists in the form of molybdenum sulfide,accounting for 95.04%,the bismuth mainly exists in the form of bismuth sulfide,accounting for 68.42%,followed by natural bismuth,accounting for 21.64%.In order to determine the reasonable recovery processing of ore ,beneficiation test was carried out.The results show that,at grinding fineness of -0.074 mm accounting for 90%,with sodium silicate as inhibitor and BK205 as collector,via one roughing three cleaning two scavenging Mo-Bi iso flotability flotation,Mo-Bi mixed concentrate via one roughing four cleaning two scavenging flotation separation of molybdenum and bismuth using sodium sulfide as inhibitor,sodium silicate as dispersing agent,kerosene as collector,molybdenum rough concentrate using sulfuric acid as the pH adjuster,sodium silicate as the dispersing agent,SN- 9 as collector via one roughing two cleaning two scavenging desiliconized flotation.Molybdenum concentrate with Mo grade of 48.22%,and recovery of 81.07%,desiliconized bismuth concentrate with Bi grade of 52.12% and recovery of 58.37%,bismuth middling with Bi grade of 2.62% and recovery of 3.23% was obtained.