Evaluation of mining and mineral processing methods’ impact on tantalite concentrate in Kenticha open pit mine, southern Ethiopia

IF 0.9 Q4 GEOSCIENCES, MULTIDISCIPLINARY Applied Earth Science-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2020-08-20 DOI:10.1080/25726838.2020.1806676

Weldegebrial Haile, B. Konka, Z. Desta

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引用次数: 1

Abstract

ABSTRACT Tantalite mineralization is located at Kenticha, southern Ethiopia and hosted by granitic pegmatite. The pegmatite has intruded the low-grade Neoproterozoic basement that forms part of the southern end of Arabian Nubian Shield. Ethiopian Mineral Development Share Company is conducting open pit mining and producing about 150 tons of tantalite concentrate annually. About 500 kg concentrate with ∼50% tantalite is produced a day from 1200 tons of feed using different mineral processing techniques. Impact of dilution and ore loss on the recovery of concentrate was studied by collecting five samples, 30 kg each from the mine site and tailings. The results suggest that the effect of dilution is about 5% and ore loss in tailings is 13%. Impact of ore loss is significant compared to dilution. Ore loss can be improved by (i) adjusting the shaking tables, (ii) adjusting ore-water ratio irrespective of grain size; and (iii) dry magnetic separation.

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埃塞俄比亚南部肯蒂查露天矿开采和选矿方法对钽精矿的影响评价

摘要钽铁矿矿化位于埃塞俄比亚南部的Kenticha，主要由花岗伟晶岩构成。伟晶岩侵入了低品位新元古代基底，该基底构成阿拉伯-努比亚地盾南端的一部分。埃塞俄比亚矿产开发股份公司正在进行露天开采，每年生产约150吨钽精矿。约500 使用不同的矿物加工技术，每天从1200吨饲料中生产公斤精矿，其中含50%的钽铁矿。通过收集5个样品，30，研究了稀释和矿石损失对精矿回收率的影响每公斤来自矿场和尾矿。结果表明，稀释效果约为5%，尾矿中矿石损失为13%。与贫化相比，矿石损失的影响是显著的。矿石损失可以通过（i）调整振动台，（ii）调整矿水比而不考虑粒度来改善；和（iii）干式磁选。

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Applied Earth Science-Transactions of the Institutions of Mining and Metallurgy GEOSCIENCES, MULTIDISCIPLINARY-

CiteScore

1.70

自引率

10.00%

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