白银厂火焰山铜锌矿石工艺矿物学研究

Study on Process Mineralogy of Huoyanshan Copper Zinc Ore in Baiyinchang

以白银厂火焰山铜锌矿石为研究对象,进行工艺矿物学研究。结果表明:原矿石中含铜0.26%,含锌3.58%,含硫21.20%;矿石为原生硫化矿,金属矿物以黄铁矿为主,其次为闪锌矿,少量黄铜矿等。综合样中粒度小于0.074 mm的黄铁矿占40%,闪锌矿占35%,黄铜矿占60%。该矿石由于高硫低铜锌、黄铜矿及闪锌矿与黄铁矿间嵌布关系密切、细粒级黄铜矿占有率较高等因素致使黄铜矿、闪锌矿较难与黄铁矿分离,且铜锌不能有效分离。结合工艺矿物学研究内容,最终确定铜锌混选-粗精矿再磨精选的工艺流程,获得的锌精矿含锌42.89%,锌回收率78.34%。

Study on the process mineralogy of Huoyanshan copper zinc ore in Baiyinchang.The results show that the content of copper,zinc and sulfur is 0.26%,3.58%and 21.20%in the ore;the ore is primary sulfide,and the main metal minerals is pyrite,followed by sphalerite,a little chalcopyrite.The proportion of pyrite,sphalerite and chalcopyrite with particle size less than 0.074 mm is 40%,35%and 60%respectively in the comprehensive sample.Because of the high sulfur and low copper zinc,chalcopyrite,sphalerite and pyrite are closely related,and the proportion of fine-grained chalcopyrite is high,chalcopyrite and sphalerite are difficult to separate from pyrite,and copper and zinc cannot be separated effectively.Combined with the research content of process mineralogy,the mineral technological process was determined of copper zinc mixed separation-regrinding of rough concentrate and fine-dressing.The zinc concentrate obtained contains 42.89%zinc with a zinc recovery of 78.34%.