某氧化铜矿石选矿试验研究

Experimental study on the beneficiation of certain copper oxide ores

摘要: 某氧化铜矿石铜品位为1.24 %，自由氧化铜分布率占93.65 %。针对该矿石性质，进行了浮选工艺研究，考察了磨矿细度、药剂用量等工艺条件对选别指标的影响。结果表明：在磨矿细度-0.074 mm占70 %，硫化钠和硫酸铵作为硫化剂，异戊基黄药和苯甲基羟戊酸作为捕收剂的条件下，原矿经两次粗选、两次精选、两次扫选浮选流程，中矿集中再选，获得铜品位30.11 %、铜回收率89.79 %，银品位954.90 g/t、银回收率91.46 %的良好选别指标。

Abstract: The copper grade of certain copper oxide ores is 1.24 % with free copper oxide accounting for 93.65 %.Based on the ore property,the study on the flotation flowsheet is carried out,investigating the influence of grinding fineness and reagent dosage on mineral processing indexes.The results show that with grinding fineness -0.074 mm accounting for 70 %,sodium sulfide and ammonium sulfide used as vulcanizing agent,and isoamyl xanthate and benzyl hydroxy valeric acid used as collector,the process including twice roughing,twice cleaning and twice scavenging for run-of-mill ores and concentration before reprocessing for middlings,can obtain good processing indexes:copper grade 30.11 %,copper recovery rate 89.79 %,silver grade 954.90 g/t,silver recovery rate 91.46 %.