南非某铂钯尾矿中铂钯的赋存状态研究
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摘要
某铂钯尾矿中Pt和Pd的品位分别为0.91 g/t和0.40 g/t。本文利用光学显微镜、扫描电子显微镜,并结合矿物自动分析仪(MLA)查明了尾矿中铂钯的赋存状态,为该尾矿的综合回收提供理论依据。研究表明,铂钯矿物复杂多样,主要为硫铂矿、砷铂矿和铂-硫铜钴矿,其次为硫镍铂钯矿,另有少量铂-硫镍钯矿、硫砷铂矿、汞钯矿、六方砷钯矿、砷锑钯矿等;铂钯矿物的嵌布粒度特别细,均小于15μm,其中53.17%分布在5μm以下;此外,42.20%铂钯矿物以包裹体的形式嵌布于顽火辉石、钙长石等脉石矿物中,这部分铂钯回收难度大,另有33.08%分布在脉石矿物粒间、脉石矿物与铬铁矿、脉石矿物与黄铜矿、脉石矿物与黄铁矿粒间,24.16%分布在脉石矿物裂隙中。由于铂钯矿物矿物组成复杂,嵌布粒度细,并且多以与脉石贫连生的形式产出,因此该尾矿中铂钯的回收难度比较大。
The Pt and Pd grade in the tailings are 0.91 g/t and 0.40 g/t respectively. In order to provide theoretical basis for comprehensive recovery of the Pt-Pd, the occurrence state research is carried out using optical microscope, scanning electron microscopy and MLA. The results show that Pt-Pd minerals are complicated and various, mainly cooperite, sperrylite, and Pt-carrollite, followed by braggite, and a small amount of Pt-vysotskite, platarslite, potarite, atheneite and mertieite, etc. The size of Pt-Pd minerals is less than 15 μm, and 53.17% of the grains is less than 5 um. In addition, 42.20% of Pt-Pd minerals occur as inclusion in gangue minerals, such as enstatite and anorthite, which are difficult to recover. Besides, 33.08%of Pt-Pd minerals distribute among mineral particles, and 24.16% in the fissure of gangue minerals.The Pt-Pd tailings are difficult to recover, which are characterized by complicated compositions, fine size, and mainly less than 50% locked with gangue mineral.
The Pt and Pd grade in the tailings are 0.91 g/t and 0.40 g/t respectively. In order to provide theoretical basis for comprehensive recovery of the Pt-Pd, the occurrence state research is carried out using optical microscope, scanning electron microscopy and MLA. The results show that Pt-Pd minerals are complicated and various, mainly cooperite, sperrylite, and Pt-carrollite, followed by braggite, and a small amount of Pt-vysotskite, platarslite, potarite, atheneite and mertieite, etc. The size of Pt-Pd minerals is less than 15 μm, and 53.17% of the grains is less than 5 um. In addition, 42.20% of Pt-Pd minerals occur as inclusion in gangue minerals, such as enstatite and anorthite, which are difficult to recover. Besides, 33.08%of Pt-Pd minerals distribute among mineral particles, and 24.16% in the fissure of gangue minerals.The Pt-Pd tailings are difficult to recover, which are characterized by complicated compositions, fine size, and mainly less than 50% locked with gangue mineral.
引文
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[3]王濮,潘兆橹,翁玲宝.系统矿物学(上、中、下册)[M].北京:地质出版社,1982.
[4]方明山,王玲,肖仪武.非洲某铂钯矿工艺矿物学研究[J].矿冶,2014,23(1):72-76.
[5]梁冬云.西南部低品位铂钯矿石中铂钯赋存状态研究[J].有色金属:选矿部分,2000(2):1-4,31.
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