尼日尔某氧化铜矿工艺矿物学及回收工艺

    Process Mineralogy and Recovery Process of a Copper Oxide Mine in Niger

    • 摘要: 以尼日尔某氧化铜矿为研究对象,通过化学分析、X 射线衍射分析及光学显微镜分析对原矿进行了详细的工艺矿物学研究。结果表明, 原矿含铜6.04%,其中游离氧化铜、结合氧化铜分别为65.07%、31.95%,是高结合率氧化铜矿。矿石中金属矿物以孔雀石、蓝铜矿,硅孔雀石、辉铜矿、黄铁矿、褐铁矿为主,脉石矿物包括钾长石、斜长石、石英、黑云母等,矿物成分较为复杂。原矿中的铜大部分以孔雀石和蓝铜矿的形式存在,主要嵌布在石英、长石等脉石中。论文采用“浮选-浸出”选冶联合工艺路线,经浮选后获得铜品位28.23%、回收率为56.18%的铜精矿,其尾矿直接用稀硫酸浸出,浸出率为91.15%,铜的综合回收率达到96.25%,获得了较好的回收效果。

       

      Abstract: Taking a copper oxide ore from Niger as a research object, a detailed process mineralogical study on the raw ore was carried out by chemical analysis, X-ray diffraction analysis and optical microscope analysis. The results show that the original ore contains 6.04% copper, 65.07% of which is free copper oxide and 31.95% is bound copper oxide, respectively, which is a high binding rate copper oxide ore. The metallic minerals in the ore are mainly malachite, blue copper ore, silica malachite, pyroxene, pyrite and limonite, and the vein minerals include potassium feldspar, plagioclase, quartz and black mica, which is a complex mineral composition. Most of the copper in the original ore exists in the form of blue copper ore and malachite, and is mainly embedded in quartz, feldspar and other veinlets. The combined flotation-leaching process was proposed in the paper. After flotation, a copper concentrate with a copper grade of 28.23% and a recovery of 56.18% was obtained, and the tailings were directly leached with dilute sulfuric acid, with a leaching rate of 91.15% and a comprehensive recovery of 96.25% copper.

       

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