蒙古某低品位铜金矿选矿工艺优化及尾矿综合回收铁试验研究  

Experimental Study on Beneficiation Process Optimization and Comprehensive Recovery of Iron from Tailings of a Low grade Copper-gold Ore in Mongolia

作　　者：魏转花 岳涛 纪婉颖 黄裕卿 WEI Zhuanhua;YUE Tao;JI Wanying;HUANG Yuqing(State Key Laboratory of Comprehensive Utilization of Low-Grade Refractory Gold Ores,Xiamen 361101,China;Xiamen Zijin Mining&Metallurgy Technology Co.,Ltd.,Xiamen 361101,China)

机构地区：[1]低品位难处理黄金资源综合利用国家重点实验室,福建厦门361101 [2]厦门紫金矿冶技术有限公司,福建厦门361101

出　　处：《有色金属工程》2024年第8期104-110,共7页Nonferrous Metals Engineering

摘　　要：蒙古某低品位铜金矿原矿含金0.20 g/t、铜0.24%、硫1.80%、磁性铁1.70%。铜矿物主要是黄铜矿,微量斑铜矿及铜蓝,其他硫化物主要是黄铁矿,磁性矿物主要是磁铁矿和赤铁矿,可综合回收。针对该矿石中目标矿物含量低、嵌布粒度细的特点,采用“铜硫混合浮选-混合浮选精矿再磨-铜硫分离-混合浮选尾矿磁选回收铁”磁浮联合工艺流程,闭路试验可获得铜金混合精矿品位Cu 20.30%、Au 11.44 g/t,回收率Cu 86.00%、Au 69.40%;铁精矿铁品位65.34%,铁回收率23.80%,磁性铁回收率91.70%的试验指标。与原生产工艺相比,在显著提高铜金精矿品位的同时,综合回收了浮选尾矿中的铁资源。A low grade copper-gold ore in Mongolia contains 0.20 g/t gold,0.24%copper,1.80%sulfur and 1.7%magnetic iron.Copper minerals are mainly the chalcopyrite mineral,a small amount of Bornite and copper blue;The other sulfides are mainly pyrite;Magnetic minerals are mainly magnetite and hematite,which can be recovered comprehensively.Based on the ore properties of low content of target minerals and fine distribution size,the flotation-magnetic process of"Cu-S bulk flotation-mixed concentrate regrinding-Cu-S separation-comprehensive recovery of Fe from bulk flotation tailings"was recommended,and the closed-circuit flotation test obtained a copper-gold bulk concentrate containing 20.30% copper and 11.44 g/t gold,with recoveries of 86.00%copper and 69.40% gold.A final iron concentrate containing 65.34%iron was then obtained by the flotation-magnetic process,with recoveries of 23.80%iron and 91.70%magnetic iron.Compared with the original process,iron resource in flotation tailings can be comprehensively recovered while copper and gold concentrate grade were significantly improved.

关 键 词：低品位 铜金矿 铜硫分离 综合回收铁 磁选 

分 类 号：TD922[矿业工程—选矿] TD923TD926.4