| 稀土萃取分离废水制备高纯碳酸氢镁溶液过程中铁杂质的行为与影响 |
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| 引用本文： | 刘洪吉,冯宗玉,黄小卫,龙志奇,崔大立.稀土萃取分离废水制备高纯碳酸氢镁溶液过程中铁杂质的行为与影响[J].中国稀土学报,2012,30(3):273-277. |
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| 作者姓名： | 刘洪吉 冯宗玉 黄小卫 龙志奇 崔大立 |
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| 作者单位： | 北京有色金属研究总院稀土材料国家工程研究中心,有研稀土新材料股份有限公司,北京100088 |
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| 基金项目： | 国家863重大项目，水体污染与治理科技重大专项项目 |
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| 摘 要： | 以稀土冶炼分离过程中产生的氯化镁废水和白云石为原料制备氢氧化镁,然后采用碳化法制备高纯碳酸氢镁溶液,研究了铁杂质离子的行为与影响。结果表明:碳酸氢镁溶液中的杂质铁是由于二价固态铁发生碳化反应而引入并以重碳酸亚铁(Fe(HCO3)2)形式存在,即碳化反应过程是除铁的核心工序,Mg(HCO3)2溶液经过除铁后沉淀稀土离子可以明显降低沉淀产物中铁杂质含量。本文为氯化镁废水-白云石碳化法制备碳酸氢镁溶液过程中铁杂质离子的去除提供切实可行的理论指导。
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| 关 键 词： | 稀土冶炼 氯化镁废水 碳酸氢镁 碳化 铁杂质 |
Behavior and Influence of Iron Impurities on Preparing High-Purity Mg(HCO3)2 with Rare Earth Extraction Separation Wastewater |
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| Liu Hongji
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Feng Zongyu
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Huang Xiaowei
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Long Zhiqi
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Cui Dali.Behavior and Influence of Iron Impurities on Preparing High-Purity Mg(HCO3)2 with Rare Earth Extraction Separation Wastewater[J].Journal of the Chinese Rare Earth Society,2012,30(3):273-277. |
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| Authors: | Liu Hongji Feng Zongyu Huang Xiaowei Long Zhiqi Cui Dali |
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| Institution: | (National Engineering Research Center for Rare Earth Materials,Grirem Advanced Material Co.Ltd.,General Research Institute for Nonferrous Metals,Beijing 100088,China) |
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| Abstract: | The behavior and influence of Fe impurities were studied during the preparation of high-purity Mg(HCO3)2 solution through carbonation with dolomite and MgCl2 wastewater(generated from rare earth smelting).The results showed that Fe impurities in Mg(HCO3)2 solution was generated due to the carbonation of solid Fe2+ in Fe(HCO3)2 form,and the carbonation reaction was the core procedure for the iron removal.The Fe impurity content of precipitate could be decreased obviously with the treated Mg(HCO3)2 solution.This paper provided a practical theory for removing impurities in preparation of Mg(HCO3)2 solution with MgCl2 wastewater-dolomite method. |
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| Keywords: | rare earth smelting MgCl2 wastewater Mg(HCO3)2 carbonization Fe impurities |
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