某斑岩型铜矿中Sc的赋存状态及对选矿工艺的影响  

A Study on Occurrence State of Scandium in a Porphyry Copper Ore and Its Influence on the Mineral Processing Technology

作　　者：惠博[1,2] 陈晓青[1,2] 赵开乐[1,3] 刘飞燕[1,2] 

机构地区：[1]中国地质科学院矿产综合利用研究所,四川成都610041 [2]国土资源部钒钛磁铁矿综合利用重点实验室,四川成都610041 [3]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《矿物学报》2016年第3期423-428,共6页Acta Mineralogica Sinica

基　　金：国家自然科学基金项目(批准号:41102060;51404218)

摘　　要：利用矿相显微镜、扫描电子显微镜、X射线能谱探针和化学分析等手段对某斑岩型铜矿的工艺矿物学特征进行了研究,重点分析了Sc的赋存状态,讨论了影响Cu、Fe和Sc回收的矿物学因素。结果表明铜品位0.35%,Sc为28.2 g/t,达到了综合评价的品位,Sc主要以类质同象形式分散分布于矿石中,辉石是Sc的主要载体矿物(相对配分率66.67%),应该作为选矿富集Sc的对象。矿物鉴定结果表明铜矿物总量为0.52%,钛磁铁矿8.23%,辉石44.17%,斜长石42.62%,矿石中未发现Sc的独立矿物。粒度统计结果显示,矿石具有典型的辉绿结构,嵌布紧密,粒度微细,难以解离。建议利用铜硫化物的可浮性,通过浮选作业回收Cu,再利用磁铁矿、辉石以及斜长石之间的磁性差异来使三者进行分离。辉石的分离回收过程就是Sc的一个物理富集过程。综合考虑,提出"浮选选铜-弱磁选铁-强磁选钪"的原则流程。The processing mineralogy characteristics of a porphyry copper ore were investigated through microscope, SEM, EDX, chemical analysis and other means, which focusing on the analysis of the occurrence state of scandium. And then the effect of mineralogical factors on the recovery of copper, iron and scandium were discussed. Chemical analysis results show that the minerals contain 0.35% Cu and 28.2 g/t Sc, which reach the industrial grade of comprehensive recovery. Minerals identification results show that the copper minerals, Ti-magnetite, pyroxene and plagioclase account for 0.52%, 8.23%, 44.17% and 42.62% of total minerals, respectively. However, the independent mineral of Sc was not found in the ores. Grain size statistics results show that the ores has typical diabasic texture and they also have the characteristic of fine particle size closely disseminated, which are difficult to be dissociated. Occurrence state of scandium results show that the SC is mainly dispersive distribution in the ores. Pyroxene is the main carrier mineral for SC（relatively distribution rate of 66.67%）, which should be the enrichment object in the flotation. The study recommends using flotation recovery of copper, and using the magnetic difference of magnetite, pyroxene and plagioclase to separate them. In essence, the process of separation of pyroxene was a physical scandium enrichment processing. As a result, the mineral processing process is adopting the flotation of copper, weak magnetic of iron, and strong magnetic separation of scandium.

关 键 词：斑岩型铜矿 SC 赋存状态 选矿影响因素 

分 类 号：P575[天文地球—矿物学] P579[天文地球—地质学]