西藏某铜钼多金属矿浮选工艺流程优化实验  

Flotation Process Optimization of a Copper Molybdenum Polymetallic Ore in Xizang

作　　者：周利华 ZHOU Lihua(Zijin Mining Group Co.,Ltd.,State Key Laboratory of Comprehensive Utilization of Low-grade Refractory Gold Ores,Longyan 364000,Fujian,China;Xiamen Zijin Mining&Metallurgy Technology Co.,Ltd.,Xiamen 361000,Fujian,China)

机构地区：[1]紫金矿业集团股份有限公司,低品位难处理黄金资源综合利用国家重点实验室,福建龙岩364000 [2]厦门紫金矿冶技术有限公司,福建厦门361000

出　　处：《矿产综合利用》2025年第1期125-131,共7页Multipurpose Utilization of Mineral Resources

摘　　要：西藏某低品位斑岩型含银铜钼矿,原矿含Cu 0.35%、含Mo 0.018%、含Ag 2.18 g/t、含S 2.5%,铜矿物主要为黄铜矿,其次为辉铜矿,钼矿物主要为辉钼矿,硫矿物主要为黄铁矿,辉银矿为银的主要赋存矿物。黄铁矿的可浮性极好,采用“铜钼等可浮-强化选铜-铜硫分离”的流程,配合使用强选择性捕收剂BK-345,低碱环境下获得铜钼混合精矿,通过强化选铜提高铜金属回收,根据铜矿物微细粒嵌布的矿石特性,铜硫混合粗精矿超细磨至-20μm,浮选闭路实验最终获得含Cu 26.88%、含钼1.65%、含Ag 110.5 g/t,Cu回收率61.2%、Mo回收率73.9%、Ag回收率40%的铜钼混合精矿,获得含Cu 19.07%、含Ag 112.7 g/t,Cu回收率24.7%、Ag回收率23.2%的铜精矿2,综合铜精矿含Cu 24.04%、含Mo 1.17%、含Ag 111.3 g/t,Cu回收率85.9%、Mo回收率82.3%、Ag回收率63.2%。而采用“全硫浮选-铜硫分离”的流程,铜钼与硫分离需添加强石灰抑制,辉钼矿也受到较强抑制,获得的钼回收率较低,仅57.5%。相比混浮流程,在其他金属回收率略有提升的前提下,等可浮流程钼金属品位提升0.84个百分点,钼回收率提升16.4个百分点。A low-grade porphyry type silver bearing copper molybdenum ore in Xizang contains 0.35%Cu,0.018%Mo,2.18 g/t Ag and 2.5%S.The copper mineral is mainly chalcopyrite,followed by chalcocite.The molybdenum mineral is mainly molybdenite,the sulfur mineral is mainly pyrite,and the silver bearing mineral is silver.Pyrite has excellent floatability.The process of"floatability of copper and molybdenum-enhanced copper separation-copper sulfur separation"is adopted,combined with the use of strong selective collector BK-345,to obtain copper molybdenum mixed concentrate in low alkali environment.Through enhanced copper separation,the recovery of copper metal is improved.According to the ore characteristics of fine particles of copper minerals,the copper sulfur mixed coarse concentrate is superfine ground to-20μm.The flotation closed-circuit test finally obtained the copper molybdenum mixed concentrate containing 26.88%Cu,1.65%Mo,110.5 g/t Ag,61.2%Cu recovery,73.9%Mo recovery and 40%Ag recovery,and obtained copper concentrate 2 containing 19.07%Cu,112.7 g/t Ag,24.7%Cu recovery and 23.2%Ag recovery.The comprehensive copper concentrate contained 24.04%Cu,1.17%Mo and 111.3 g/t Ag,85.9%Cu recovery,82.3%Mo recovery and 63.2%Ag recovery.In the process of"total sulfur flotation copper sulfur separation",the separation of copper,molybdenum and sulfur needs to be restrained by adding strong lime,molybdenite is also strongly restrained,and the molybdenum recovery is low,only 57.5%.Compared with the mixed flotation process,on the premise that the recovery rate of other metals is slightly improved,the grade of molybdenum metal in the equal floatable process is increased by 0.84 percentage points and the recovery rate of molybdenum is increased by 16.4 percentage points.

关 键 词：含银铜钼矿 等可浮 混浮流程 强选择性捕收剂 

分 类 号：TD982[矿业工程—选矿]