某难选铜铁多金属矿高效分选与综合回收试验  

Test on efficient separation and comprehensive recovery of a refractory copper-iron polymetallic ore

作　　者：郭风芳[1] 张严之 赵强 GUO Fengfang;ZHANG Yanzhi;ZHAO Qiang(Hainan Mining Co.,Ltd.,Changjiang 571927,Hainan,China;Hunan Province Materials Design Institute Co.,Ltd.,Changsha 410205,Hunan,China;Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410205,Hunan,China)

机构地区：[1]海南矿业股份有限公司,海南昌江571927 [2]湖南省建筑材料研究设计院有限公司,湖南长沙410125 [3]中冶长天国际工程有限责任公司,湖南长沙410205

出　　处：《烧结球团》2024年第5期70-79,共10页Sintering and Pelletizing

基　　金：国家重点研发计划资助项目(2021YFC2902305)。

摘　　要：某铜铁多金属矿中铜主要以黄铜矿的形式赋存,质量分数为0.26%;铁主要以磁黄铁矿、磁铁矿与褐铁矿的形式赋存,质量分数为27.88%;砷主要以毒砂的形式赋存,质量分数为0.76%。其矿物嵌布粒度较细,且相互间的共生关系密切,属复杂难选高硫高砷的铜-铁多金属矿。基于矿石的性质特点,本文开展系统的选矿试验研究,制定“优先选铜—弱磁选铁—铁硫分离”的选别工艺流程,通过采用Z-200为铜捕收剂,强化粗精矿再磨、铁精矿脱硫等多项措施,有效提高原矿分选过程中铜、铁的回收效果。闭路试验获得了铜品位为25.25%、回收率为81.81%、砷质量分数为0.16%的铜精矿,以及铁品位为64.98%、回收率为33.26%、硫质量分数为0.15%的铁精矿,实现铜、铁、硫矿物的高效分选与综合回收,为类似资源的开发利用提供借鉴。Copper in a copper-iron polymetallic ore is mainly in the form of chalcopyrite,with a mass fraction of 0.26%.Iron is mainly in the form of pyrrhotite,magnetite and limonite,with a mass fraction of 27.88%.Arsenic is mainly in the form of toxic sand,with a mass fraction of 0.76%.Its mineral embedding has a fine particle size and a close symbiotic relationship with each other,which is a complex copper-iron polymetallic ore with high sulfur and high arsenic.Based on the nature and characteristics of the ore,a systematic beneficiation test is carried out,the separation process of “preferential copper separation-weak magnetic iron separation,iron separation,iron-sulfur separation” is formulated,and the recovery effect of copper and iron in the process of raw ore separation is effectively improved by using Z-200 as the copper collector to strengthen the re-grinding of crude concentrate and desulfurization of iron concentrate.The closed-circuit test obtains copper concentrate with a copper grade of 25.25%,a recovery rate of 81.81% and an arsenic mass fraction of 0.16%,and an iron concentrate with an iron grade of 64.98%,a recovery rate of 33.26% and a sulfur mass fraction of 0.15%,which realizes the efficient separation and comprehensive recovery of copper,iron and sulfur minerals,and provides references for the development and utilization of similar resources.

关 键 词：铜铁多金属矿 黄铜矿 磁黄铁矿 毒砂 浮-磁联合工艺 

分 类 号：TD95[矿业工程—选矿]