| 稀土矿浮选中Ce3+对磷灰石的活化机理研究 |
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| 引用本文： | 王介良,曹钊,王建英,张雪峰,雷霄.稀土矿浮选中Ce3+对磷灰石的活化机理研究[J].矿冶工程,2018,38(6):55-59. |
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| 作者姓名： | 王介良 曹钊 王建英 张雪峰 雷霄 |
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| 作者单位： | 1.内蒙古科技大学 矿业研究院,内蒙古 包头 014010;
2.内蒙古科技大学 内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室, 内蒙古 包头 014010 |
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| 基金项目： | 国家自然科学基金(51764045);
内蒙古自治区科技计划资助项目(4050901051701);
内蒙古科技大学优秀青年基金项目(2017YQL05);
内蒙古科技大学创新基金项目(2017QDLB05) |
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| 摘 要： | 通过纯矿物浮选、溶液化学计算、Zeta 电位测试、红外光谱分析测试,研究了稀土矿浮选时矿浆中Ce3+对磷灰石的活化机理。结果表明,Ce3+在碱性条件下对磷灰石具有活化作用,其活化机理为：Ce3+吸附提高了磷灰石表面的正电性,增强了磷灰石表面与阴离子羟肟酸捕收剂的静电吸附作用,且在磷灰石表面形成Ca-Ce(OH)2/Ce(OH)+活性位点。红外光谱测试表明,无Ce3+活化时,辛基羟肟酸在磷灰石表面主要发生物理吸附,羟肟酸与Ca2+结合能小,在磷灰石表面的化学吸附作用弱; 被Ce3+活化后,辛基羟肟酸与磷灰石表面吸附的Ce3+反应生成稳定的络合物-C(==O)-Ce-O-N-,羟肟酸与Ce3+结合能大,化学吸附作用强,加强了羟肟酸在磷灰石表面的吸附作用,从而活化磷灰石。
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| 关 键 词： | 稀土 浮选 Ce3+ 磷灰石 活化 |
| 收稿时间： | 2018-06-11 |
Activation Mechanism of Ce(Ⅲ) on Apatite in Flotation of Rare Earth Ore |
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| WANG Jie-liang,CAO Zhao,WANG Jian-ying,ZHANG Xue-feng,LEI Xiao.Activation Mechanism of Ce(Ⅲ) on Apatite in Flotation of Rare Earth Ore[J].Mining and Metallurgical Engineering,2018,38(6):55-59. |
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| Authors: | WANG Jie-liang CAO Zhao WANG Jian-ying ZHANG Xue-feng LEI Xiao |
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| Affiliation: | 1.Institute of Mining Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China;
2.Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China |
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| Abstract: | The activation mechanism of apatite by Ce3+ ions in the flotation pulp of rare earth ore was investigated based on pure mineral flotation tests, solution chemistry study, Zeta potential and infrared (IR) spectrum analyses. The results show that, owing to the adsorption of Ce3+ ions in alkaline pulp, apatite was more positively charged and activated, therefore the electrostatic adsorption of anionic hydroxamic acid collectors on apatite was enhanced and Ca-Ce(OH)2/Ce(OH)+ active sites were formed. IR spectrum analysis shows that the reaction mechanism for octyl hydroxamic acid (OHA) and apatite without Ce3+ activation is physisorption, and the chemical adsorption of OHA on apatite is weak due to a low binding energy for OHA and Ca2+. When OHA reacts with Ce3+ activated apatite, a stable coating of chelate complex -C(==O)-Ce-O-N- is generated, and a high binding energy for OHA and Ce3+ results in the strong chemical adsorption, which enhances the adsorption of OHA onto apatite and thus activates its flotation. |
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| Keywords: | rare earth flotation Ce3+ ions apatite activation |
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