某氰渣工艺矿物学及金浮选工艺研究

摘要

针对某选矿厂氰渣进行了工艺矿物学研究,得出其中所含可回收利用的金属元素为Au,质量分数为2.51×10-6,主要包裹在黄铁矿和砷黄铁矿中.根据矿石性质,开展了单因素对浮选指标的影响试验,最终确定较适宜的浮选条件:矿石未磨,浓H2SO4除CN-,矿浆pH=6.5,CuSO4用量为150 g/t,丁铵黑药用量为70 g/t,丁基黄药用量为100 g/t,经过一次粗选、两次扫选、三次精选工艺试验,最终取得金精矿中金品位为18.70×10-6、回收率为70.18%的良好指标.%A detailed mineralogy process study of a cyanide residue was performed,and the valuable metal elements is gold with the content of 2.51×10-6,which is mainly contained in pyrite and arsenopyrite.Single factor flotation test was performed according to property of mineral ore.Eventually,achieving the grade of gold concentration is18.70×10-6and recovery is 70.18% in suitable flotation conditions by adding CuSO4,ammonium dibutyl dithiophosphate and buylxanthate,whose dosage are 150×10-6,70×10-6and 100×10-6,respectively,into the pulp in the test and cyanide residue without grinding,CN-excluded by H2SO4,and the pH of pulp is 6.5,and also performing one roughing,two scavenging and three times cleaning.