摘要
湖南柿竹园钨锡钼铋多金属矿原矿含少量铜资源,铜在“钼铋混合-分离浮选”过程中大部分富集至铋精矿中(Cu品位3%左右)。为提高资源利用率,针对该含铜铋精矿,进行了工艺矿物学分析和回收铜试验。结果表明:影响铜回收的主要因素是前端作业大量硫化钠侵蚀铜、铋矿物表面,铜、铋、硫矿物可浮性大幅下降且更加接近,铋精矿中各金属矿物的粒度微细(-0.023 mm含量近70%);采用“浮选脱药(泥)排尾-粗选排尾-精粗选两精两扫选”浮选工艺,石灰+CK-DB组合抑制铋矿物,Z-200+F6选择性浮选铜矿物,实验室闭路试验获得产率7.22%、Cu品位23.41%、Bi含量1.12%、Cu回收率53.28%的铜精矿,铜精矿中Bi损失率0.27%,实现了低品位伴生铜的有效回收。试验结果可为企业进一步扩充金属品种谱系提供技术依据。
The raw ore of the Shizhuyuan tungsten tin molybdenum bismuth polymetallic mine in Hunan province contains a small amount of copper resources.During the process of molybdenum bismuth bulk flotation followed by separation,most of the copper is enriched in the bismuth concentrate(with Cu grade of about 3%).To improve resource utilization,process mineralogical analysis and copper recovery experiment were conducted on the copper bismuth concentrate.The results show that the main factor affecting copper recovery is the erosion of copper and bismuth mineral surfaces by a large amount of sodium sulfide during front-end operations,resulting in a significant decrease in the floatability of copper,bismuth,and sulfur minerals and a closer proximity.The particle size of each metal mineral in the bismuth concentrate is fine(-0.023 mm content is nearly 70%);The flotation process of“reagent residue(mud)removal,roughing to discard tailings,rough-cleaning,two cleaning and two clean-scavenging flotation”was adopted.CaO+CK-DB was used to suppress bismuth minerals,and Z-200+F6 for selective flotation of copper minerals.The laboratory locked-cycle test obtained a copper concentrate with yield of 7.22%,Cu grade of 23.41%,Bi content of 1.12%,and Cu recovery of 53.28%.The Bi loss rate in the copper concentrate was 0.27%,an effective recovery of low-grade associated copper was realized.The experiment results can provide technical basis for enterprises to further expand their product spectrum.
作者
李文恒
李杰
祁忠旭
孙大勇
李昭旺
LI Wenheng;LI Jie;QI Zhongxu;SUN Dayong;LI Zhaowang(Hunan Shizhuyuan Nonferrous Metals Co.,Ltd.,Chenzhou 423037,China;Changsha Institute of Mining Research Co.,Ltd.,Changsha 410012,China;Engineering Technology Research Center of Hunan Province for Comprehensive Utilization of Mining Solid Waste,Changsha 410012,China)
出处
《有色金属工程》
CAS
北大核心
2024年第7期109-114,共6页
Nonferrous Metals Engineering
基金
中国五矿科技专项计划项目(2022ZXB04-4)。
关键词
含铜铋精矿
铜铋分离
浮选工艺
抑制剂
bismuth concentrate containing copper
copper-bismuth separation
flotation process
inhibitor
