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DOI:
有色金属(矿山部分):2021,73(3):124-128
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离子型稀土矿氯化钙浸矿模拟与参数优化研究
朱和玲, 张新光
((中铝广西有色稀土开发有限公司,南宁 530012))
Simulation and parameter optimization of Cacl2 leaching of ion-type rare earth ore
ZHU Heling, ZHANG Xinguang
((Chinalco Guangxi Nonferrous Rare Earth Development Co., Ltd., Nanning 530012, China))
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投稿时间:2020-07-22    修订日期:2020-09-14
中文摘要: 为避免离子型稀土矿原地浸出过程中带来的氨氮残留问题,本研究选用氯化钙作为新型无氨氮浸矿剂开展浸矿过程模拟及参数优化研究,重点试验了浸取剂浸矿溶液浓度、pH值、固液比等对稀土浸出率的影响。研究表明:(1)相同浸矿溶液浓度、pH、固液比的条件下,氯化钙和硫酸镁的浸矿能力分别是硫酸铵浸矿能力的84.5%和74.6%;(2)当浸矿溶液浓度为7%、固液比为1:1、PH值为4.6时,氯化钙浸矿效果的最优;(3)采用氢氧化钙对氯化稀土母液进行除杂、沉淀,除杂时pH值控制在5.1-5.4,沉淀时pH值控制在6.0-6.5可得到较为纯净的氢氧稀土产品。
中文关键词: 稀土  浸矿剂  浸矿过程模拟  参数优化
Abstract:To avoid the problem of residual ammonia nitrogen during in-situ leaching of ion-type rare earth ores, calcium chloride was selected as a new type of non-ammonia leaching agent to carry out leaching process simulation and parameter optimization. The effects of leaching solution concentration, pH value, and solid-liquid ratio on rare earth leaching rate were mainly tested. The results showed that: 1) the leaching capacity of CaCl2 and MgSO4 was 84.5% and 74.6% of that of ammonium sulfate under the same leaching solution concentration, pH and solid-liquid ratio. 2) When the leaching solution concentration was 7%, the solid-liquid ratio was 1: 1, and the pH value was 4.6, the leaching effect of calcium chloride was the best. 3) Calcium hydroxide was used to remove impurities and precipitate the mother liquor of rare earth chloride. Pure rare earth hydrogen and oxygen products can be obtained by controlling the pH value between 5.1~5.4 and 6.0~6.5 during impurity removal and precipitation.
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朱和玲,张新光.离子型稀土矿氯化钙浸矿模拟与参数优化研究[J].有色金属(矿山部分),2021,73(3):124-128.
ZHU Heling,ZHANG Xinguang.Simulation and parameter optimization of Cacl2 leaching of ion-type rare earth ore[J].NONFERROUS METALS(Mining Section),2021,73(3):124-128.

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