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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 mineralogical characteristics of a porphyry copper deposit are studied by using the methods of the mineralogical microscope, the scanning electron microscope, the X-ray spectroscopy probe and the chemical analysis. The occurrence state of Sc is mainly analyzed. The effects of Cu, Mineralogy of Fe and Sc recovery. The results show that the grade of copper is 0.35% and the content of Sc is 28.2 g / t, which reaches the grade of comprehensive evaluation. Sc is mainly distributed in minerals in the form of isomorphism, and pyroxene is the main carrier mineral of Sc (relative fraction 66.67%). , Should be used as the beneficiation enrichment Sc object. Mineral identification results show that the total amount of copper minerals 0.52%, 8.23% of titanium magnetite, pyroxenes 44.17%, plagioclase 42.62%, no separate minerals found in Sc. The statistical results of the grain size show that the ore has the typical greenery structure, close-packed, fine grain size and difficult to dissociate. It is suggested that the use of copper sulphide floatability, recovery of Cu by flotation operations, and then use the magnetite, pyroxene and plagioclase magnetic differences between the three to separate. The separation and recovery process of pyroxene is a physical enrichment process of Sc. Taken together, put forward “flotation copper - weak magnetic separation of iron - strong magnetic scandium election ” principle of the process.