Green extraction of niobium and tantalum for Ethiopian kenticha ores by hydrometallurgy process: a review
Green extraction of niobium and tantalum for Ethiopian kenticha ores by hydrometallurgy process: a review
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湿法冶金工艺绿色提取埃塞俄比亚肯蒂查矿石铌和钽：综述
DOI：
10.15406/mojmm.2018.1.00015
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发表时间：
2018
期刊：
影响因子：
4.7
通讯作者：
G. Woldetinsae
中科院分区：
文献类型：
--
作者：
B. Gebreyohannes;V. Alberto;Bogale Tadesse;A. Yimam;G. Woldetinsae
与其他经济金属一样，钽（Ta）和铌（Nb）广泛用于电子和其他高科技行业。1 2004钽铌精矿主要由铌钽铁矿（Fe，Mn）（Ta，Nb）2 O 6和其他类别的矿物组成。1 2007埃塞俄比亚拥有世界级的钽铁矿矿床，仅在澳大利亚、巴西、加拿大和莫桑比克等世界上一些国家发现。在埃塞俄比亚，特别是在埃塞俄比亚南部Adola地区的Kenticha，有稀有元素伟晶岩，代表着全球重要的钽资源。埃塞俄比亚一直在开采钽铁矿，并通过埃塞俄比亚矿产开发股份公司（EMDSC）每年出口约100-120吨Ta 2 O 5，相当于冶金工业中含有50-60重量% Ta 2 O 5的精矿，其为60wt%的Nb和Ta的提供者8从矿石中提取这些金属已经得到了大量的研究5 2035这种提取过程可以通过物理提纯开始，例如分级、重力、浮选和磁选，然后进行矿石的化学分解或分解或浸出。
Like other economical metals, tantalum (Ta) and niobium (Nb) are broadly used in electronic and other high-tech industries.1‒4 TaNb concentrates are mainly composed of columbotabatlite (Fe,Mn) (Ta,Nb)2O6 and other classes of mineral. 1‒7 Ethiopia has world class tantalite deposits, which are found only in some countries of the world such as Australia, Brazil, Canada and Mozambique. In Ethiopia, specifically at Kenticha, Adola area, Southern Ethiopia, there is rareelement pegmatite which represents a globally important tantalum source. Ethiopia has been mining and exporting tantalite via Ethiopian Mineral Development Share Company (EMDSC) about 100-120 T of Ta2O5 per year, equivalent concentrate containing 50-60 wt % Ta2O5 to the metallurgical industries, which are providers Nb and Ta for 60 wt % production of capacitors.8 The extraction of these metals from mineral ores has been significantly studied5‒35 This extraction process may begin by physical beneficiation such as sizing, gravity, floatation and magnetic separation followed by chemical breakdown or decomposition or leaching of the ore.2‒4