摘要
这是一篇矿物加工工程领域的论文。河南某钼矿属矽卡岩型钼矿,粒度嵌布细、泥质矿物含量高,浮选回收率一直偏低。本文通过对矿石性质、生产现状进行系统分析,指出生产中存在的主要问题。为适应选矿厂4000 t/d扩能改造需要,并协同强化微细粒钼矿回收,结合旋流-静态微泡浮选柱的结构特征与分选优势,提出了增加1台旋流-静态微泡浮选柱的改造方案。研究表明该钼矿嵌布粒度微细,-0.038 mm和-0.020 mm辉钼矿分别占75.80%和38.68%;矿石中含有大量的绿帘石、蒙脱石、绿泥石等泥质矿物,部分坑口泥质矿物含量40%以上;现有浮选工艺对微细粒级回收差,尾矿中-0.020 mm粒级钼矿损失占比在50%以上。实验室浮选实验结果表明旋流-静态微泡浮选柱对总尾矿和粗选尾矿中的钼均具有良好的浮选回收效果,精矿富集比和钼回收率均明显优于浮选机。工程应用进一步表明:旋流-静态微泡浮选柱对现有充气式浮选柱起到“兜底”的作用,扩能后钼回收率提高4个百分点以上,显著降低了微细粒钼在尾矿中损失,经济效益显著。
This is an essay in the field of mineral processing engineering.A molybdenum mine in Henan Province belongs to the skarn type molybdenum mine,which has the characteristics of extremely fine embedded particle size and high mud mineral content,and the molybdenum has suffered poor recovery.This paper systematically analyzed the ore properties and production status and analyzed the main problems existing in the production.In order to meet the needs of the 4000 t/d capacity expansion and reconstruction of the ore dressing plant,and to synergistically strengthen the recovery of fine-grained molybdenite particles,a cyclonic-static microbubble flotation column was proposed to add combined with the structural characteristics and separation advantages.The research results show that the molybdenum ore was embedded with micro-fine size,and-0.038 mm and-0.020 mm molybdenite accounted for 75.80%and 38.68%,respectively.Moreover,the ores contained a large amount of epidote,montmorillonite,chlorite and other argillaceous minerals,and the content of argillaceous minerals in some pit mouths was more than 40%.The existing flotation process has suffered poor recovery in the fine-grained particles,and the loss of molybdenum with-0.020 mm size in the tailings accounted for more than 50%.Laboratory flotation test results show that the cyclone-static microbubble flotation column had a good flotation effect on molybdenum recovery in total tailings and rougher tailings,and the concentrate enrichment ratio and molybdenum recovery rate were obviously better than flotation machine.The engineering practice further shows that the cyclone-static microbubble flotation column played a role in regaining better recovery for the existing flotation column,and the molybdenum recovery rate after the expansion was increased by more than 4 percentage points,and the loss of fine-grained molybdenite particles in tailings were significantly reduced,which achieved significant economic benefits.
作者
陈新
晁彦德
黄业豪
李树磊
Chen Xin;Chao Yande;Huang Yehao;Li Shulei(Luanchuan Xinxin Mining Co.,Ltd.,Luoyang,Henan,China;Longyu Molybdenum Mining Co.,Ltd.,Luoyang,Henan,China;Henan Institute of Geology,Zhengzhou,Henan,China;China University of Mining and Technology,Xuzhou,Jiangsu,China)
出处
《矿产综合利用》
CAS
北大核心
2023年第5期7-14,共8页
Multipurpose Utilization of Mineral Resources
基金
国家自然科学基金青年基金(51904299)。
关键词
矿物加工工程
旋流-静态微泡浮选柱
辉钼矿
微细粒
回收率
浮选
Mineral processing engineering
Cyclonic-static microbubble flotation column
Molybdenite
Micro-fine particles
Recovery rate
Flotation
