Study on Leaching Process of Activation Bastnaesite by HCl Solution
Study on Leaching Process of Activation Bastnaesite by HCl Solution
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DOI：
10.4028/www.scientific.net/amr.233-235.1406
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发表时间：
2011-05
期刊：
影响因子：
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通讯作者：
Xue Bian;Shao-hua Yin;Feng Zhang;W. Wu;G. Tu
中科院分区：
文献类型：
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作者：
Xue Bian;Shao-hua Yin;Feng Zhang;W. Wu;G. Tu
氟碳铈矿在一定温度下活化，然后用盐酸溶液浸出矿物中的碳酸稀土。当活化温度为400°C，活化时间为3 h，盐酸浓度为3 mol·L-1，浸出温度为90°C，液固比为20：1时，碳酸稀土和氟化稀土的浸出率分别为94.6%和0.07%。XRD和SEM分析结果表明，氟碳铈矿在活化过程中呈粉化、粗化状态，有利于盐酸浸出碳酸稀土。浸出渣的主要成分为稀土氟化物、氟化钙和硫酸钡。
Bastnaesite was activated at a temperature, and then the rare earths carbonate of the minerals was leached by HCl solution. When activation temperature was 400°C, activation time was 3h, HCl concentration was 3 mol•L-1, leaching temperature was 90°C, liquid to solid was 20:1, the leaching ratio of rare earths carbonate and rare earths fluoride was 94.6% and 0.07% respectively. The results of XRD and SEM showed that bastnaesite was powdered and coarseness in activation process, which made the leaching of rare earths carbonate by HCl solution become easy. The main components of leaching slag were rare earths fluoride, calcium fluoride and barium sulfate.