摘要
湖南某低品位白钨矿中脉石矿物以硅酸盐矿物及方解石、长石为主,该选厂存在生产流程长、分选效率低、回收率较低等问题。为此,采用旋流-静态微泡浮选柱与浮选机联合分选工艺,对该白钨矿进行了浮选试验研究。结果表明,在最佳试验条件下,即处理量25 kg/h,捕收剂硝酸铅和MTC用量各900 g/t,硫酸铝用量450 g/t,水玻璃用量600 g/t,采用“一粗一精二扫”工艺流程可得到钨品位为15.93%、回收率为79.02%的精矿。与全浮选机工艺和全浮选柱工艺相比,“柱机联合工艺”可同时强化粗粒级和细粒级白钨矿的回收,钨精矿回收率分别从全浮选机工艺的48.5%和全浮选柱工艺的68.74%提高到了79.02%。柱机联合工艺既实现了对白钨矿的有效回收,又缩短了浮选工艺流程。
Gangue minerals of a low-grade scheelite mine in Hunan are mainly silicate minerals,calcite and feldspar.This dressing plant has problems such as long production process,low separation efficiency and low recovery rate.Therefore the flotation tests of scheelite were carried out by the combined separation process of cyclonic static micro-bubble flotation column and flotation machine.The optimal test conditions are as follows:treatment capacity of 25 kg/h,collector dosage of lead nitrate and MTC 900 g/t,aluminum sulfate 450 g/t and sodium silicate 600 g/t respectively.The results show that under the optimal conditions,a tungsten concentrate with a grade of 15.93%and a recovery of 79.02%was obtained using the technological process of one roughing,one cleaning and two scavenging.Compared with the whole flotation machine process and the whole flotation column process,the"column and machine combined process"can enhance the recovery of coarse and fine scheelite at the same time.The tungsten concentrate recovery rate increases from 48.5%of the whole flotation machine process and 68.74%of the whole flotation column process to 79.02%.Column machine combined process can not only realize effective recovery of scheelite,but also shorten the flotation process.
作者
纪道河
李景超
马子龙
程炜
JI Daohe;LI Jingchao;MA Zilong;Cheng Wei(Hunan Nonferrous Metal Huangshaping Mining Co Ltd, Chenzhou 424421, Hunan, China;China University of Mining and Technology, Xuzhou 221000, Jiangsu, China;Jiangsu Zhongfu Mining Technology Co. Ltd, Xuzhou 221000, Jiangsu, China)
出处
《矿产保护与利用》
2021年第2期117-122,共6页
Conservation and Utilization of Mineral Resources
关键词
白钨矿
矽卡岩矿
微细粒矿物
柱机联合
旋流-静态微泡浮选柱
tungstite
skarn deposit
ultra-fine minerals
column-machine joint
cyclonic static microbubble flotation column
作者简介
纪道河(1986-),男,湖北大冶人,工程师,主要从事有色金属选矿技术研究和应用开发工作。
