基于MLA分析的某铜矿石选矿工艺初步研究

Preliminary Study on Mineral Processing Technology of Copper Ore Based on MLA

采用自动矿物参数分析系统(MLA)分析了某矽卡岩型铜矿矿物组成、嵌布关系,测定了不同磨矿细度下原矿及混合精矿产品的粒度分布特征及解离度特征,并根据该结果对该矿石进行了选矿工艺初步研究,确定选矿流程为:磨矿、铜硫混合浮选、粗精矿再磨、铜硫分离浮选。结果表明,在磨矿细度-74μm粒级占70%、再磨细度-20μm粒级占75%条件下,可以得到铜品位20.88%、铜回收率70.42%、银品位183.9 g/t、银回收率76.78%的铜精矿和硫品位32.65%、硫回收率91.47%的硫精矿。

A mineral liberation analysis(MLA) automatic measurement technology was used to not only analyze the composition and dissemination of minerals in a skarn copper ore, but also investigate the characteristics like particle size distribution and mineral liberation degree of raw ore and bulk concentrate samples ground to different fineness. After a preliminarily study on beneficiation technique for such ore based on the obtained results, a processing flowsheet comprised sequentially of grinding, Cu-Pb bulk flotation, regrinding of roughing concentrate and Cu/Pb flotation separation. It is shown that such flowsheet with the primary grinding fineness of-74 μm 70% and the regrinding fineness of-20 μm 75% can produce a copper concentrate grading 20.88% Cu at 70.42% recovery, and 183.9 g/t Ag at 76.78% recovery, as well as a product of sulfur concentrate grading 32.65% S at 91.47% recovery.