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非洲某钽铌砂矿矿石性质及预选工艺研究
引用本文:张成强,张红新,李洪潮,王守敬.非洲某钽铌砂矿矿石性质及预选工艺研究[J].金属矿山,2015,44(2):63-67.
作者姓名:张成强  张红新  李洪潮  王守敬
作者单位:1.中国地质科学院郑州矿产综合利用研究所,河南 郑州 450006;2.国家非金属矿产资源综合利用工程技术研究中心,河南 郑州450006;3.国土资源部多金属矿评价与综合利用重点实验室,河南 郑州 450006;4.东北大学资源与土木工程学院,辽宁 沈阳 110819
基金项目:国土资源行业公益专项(编号:201211069)
摘    要:为了给中国某矿业公司开发非洲某钽铌砂矿提供依据,首先对该矿矿石进行了工艺矿物学研究,结果表明:矿石中钽、铌的含量分别达到了97.4 g/t和1 044.2 g/t,远远超过了工业开采指标要求;有用矿物除铌铁矿外,还伴生钛铁矿、锡石、锆石以及独居石、钍石等,脉石矿物则主要为石英、长石;有用矿物嵌布粒度较粗,且基本都已经单体解离,同时它们与石英、长石的重选分离难易度处于"较易"范围;矿石中+3 mm粒级的产率达21.10%,但钽、铌在其中的分布率只有3.04%和1.33%。根据工艺矿物学研究结果,采用原矿按3 mm筛分抛尾、筛分精矿跳汰抛尾、跳汰精矿按0.5 mm分级摇床精选的工艺流程进一步进行了预选试验,获得了预选精矿产率为0.71%,Ta2O5、Nb2O5、Sn、Zr O2品位分别为1.21%、12.93%、7.12%、14.97%,相应回收率分别为89.45%、90.04%、87.16%、70.58%的较好指标,并使钛、钍、铪、铈也得到了富集。下一步将对预选精矿开展有用矿物互相分离的深选试验。

关 键 词:钽铌砂矿  矿石性质  预选工艺  综合回收

Study on Property and Pre-separation for a Tantalum-niobium Placer Deposit in Africa
Zhang Chengqiang;Zhang Hongxin;Li Hongchao;Wang Shoujing.Study on Property and Pre-separation for a Tantalum-niobium Placer Deposit in Africa[J].Metal Mine,2015,44(2):63-67.
Authors:Zhang Chengqiang;Zhang Hongxin;Li Hongchao;Wang Shoujing
Affiliation:1.Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,Chinese Academy of Geological Sciences,Zhengzhou 450006,China;2.National Engineering Research Center for Multipurpose Utilization of Nonmetallic Mineral Resources,Zhengzhou 450006,China;3.Key Laboratory of Evaluation and Multipurpose Utilization of Polymetallic Ore,Ministry of Land and Resources,Zhengzhou 450006,China;4.College of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;
Abstract:In order to provide technical basis on development of a tantalum niobium placer in Africa for a Chinese mining company,process mineralogy research is carried out on the ore.The results indicated that,the content of tantalum and niobium reaches 97.4 g/t and 1 044.2 g/t respectively,much higher than the industrial mining requirements.Besides niobite and ilmenite,there are useful minerals of cassiterite,zircon and monazite,thorium also associated.Gangue minerals are mainly quartz,feldspar; useful minerals are disseminated in relatively coarser size and somehow have already been liberated,and the degree of liberation from quartz and feldspar by gravity separation is "easier"; yield rate of the ore in +3 mm grade account for 21.10%,but distribution rate of tantalum and niobium is only 3.04% and 1.33% respectively.According to the process mineralogy,pre-separation experiments on run-of-mine ore are made,including the run-of-mine classified at 3 mm,and the coarse concentrate discarded by jig further,then classification by 0.5 mm and through cleaning separation by shaking table respectively.Pre-separation concentrate with yield rate of 0.71%,Ta2O5,Nb2O5,Sn,ZrO2 grade of 1.21%,12.93%, 7.12% and 14.97% respectively,and the corresponding recovery rate of 89.45%,90.04%,87.16%,70.58% was obtained,meanwhile titanium,thorium,hafnium,cerium have also been enriched.Valuable minerals in pre-separation concentrate separated from each other will be further researched.
Keywords:Tantalum-niobium ore  Ore property  Pre-separation process  Comprehensive utilization
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