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有色金属工程:2024,14(3)
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机械研磨对离子吸附型稀土矿矿石中稀土赋存形态的影响
李学彪1, 施意华1, 付伟2, 王爱林1, 庾慧敏1, 黄长帅1
(1.中国有色桂林矿产地质研究院有限公司 广西有色金属工程技术研究中心;2.广西有色金属隐伏矿床勘查及材料开发协同创新中心 桂林理工大学)
Effect of Mechanical Grinding Process on the Speciation of REE in Ion-Adsorbed Rare Earth Ore
Li Xuebiao1, Shi Yihua1, Fu Wei2, Wang Ailin1, Yu Huimin1, Huang Changshuai1
(1.China Nonferrous MetalGuilinGeology And Mining Co,Ltd,“Guangxi Nonferrous Metal Engineering Technology Research Center”, Guilin,China;2.Guilin University of Technology,“Guangxi Collaborative Innovation Center for Prospecting and Materials Development of Non-ferrous Metal Concealed Deposits”, Guilin,China)
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投稿时间:2023-08-30    修订日期:2023-09-23
中文摘要: 离子吸附型稀土矿是一类稀土元素呈水合或水合羟基吸附在黏土矿物表面的风化矿床。本研究首次发现了这类矿石中在干法研磨条件下会导致稀土相态发生变化,进而通过模拟实验,精确量化了机械研磨对矿石中离子相稀土含量变化的影响及其相态转变路径。结果表明,研磨后矿石中减少的离子相稀土主要转换为碳酸盐结合态,少数转换为铁锰结合态、腐殖酸结合态。其中,离子交换稀土减少53.48%,而碳酸盐结合态稀土增加36.05%。这种稀土相态转变的现象可能与研磨作用对粘土矿物的结构影响有关。X衍射和红外光谱证据指示,机械研磨过程会导致黏土矿物发生结构性损伤,晶体结构受到变形,引起黏土矿物晶格破坏,出现了无序化特征。机械研磨伴随发生的机械力化学过程发生,可能是导致机械研磨后离子相稀土减少、稀土赋存状态变化,形态间发生转移等变化的关键原因;本研究成果对于制定离子吸附型稀土矿勘查规范、矿石加工工艺、标准物质的研制流程、分析测试及黏土矿物的机械研磨机理研究等领域的理解和扩展都具有重要的启示意义。机械研磨离子吸附型稀土矿矿石导致离子相稀土减少是这类矿床研究中一个新的重要发现。
Abstract:Ion adsorption type rare earth ores(IAREO)are a type of weathered ore deposit where rare earth elements are adsorbed on the surface of clay minerals in the form of hydrated or hydrated hydroxyl groups. In this study, it was found for the first time that the rare earth phase state changes in this type of ores under dry grinding conditions, and then through simulation experiments, the effect of mechanical grinding on the changes in the ionic phase rare earth content in the ores and the phase transition path were accurately quantified. The results showed that the reduced Ion exchangeable (F2) in the ore after grinding are mainly converted into Carbonate-bound(F3), and a few are converted into Fe-Mn oxide-bound(F5) and Humic bound (F4). Among them, F2 decreased by 53.48%, while F3 increased by 36.05%. The phenomenon of rare earth phase transition may be related to the influence of grinding on the structure of clay minerals. The evidence from XRD and FTIR indicates that the mechanical grinding process can cause structural damage to clay minerals, and the crystal structure is deformed, causing the lattice damage of clay minerals and the appearance of disordered features. The occurrence of mechanochemical processes accompanying mechanical grinding may be the key reason for the reduction of ion phase rare earths, changes in rare earth occurrence state, and transfer between forms after mechanical grinding; The results of this study have important implications for the development of exploration specifications for ion adsorption type rare earth minerals, ore processing technology, development process of standard materials, analysis and testing, and research on mechanical grinding mechanisms of clay minerals. The reduction of ion phase rare earths caused by mechanical grinding of ion adsorption type rare earth ore is a new and important discovery in the study of this type of ore deposit.
文章编号:YSJSGC20230512     中图分类号:O6l4    文献标志码:
基金项目:广西自然科学基金
引用文本:
李学彪,施意华,付伟,王爱林,庾慧敏,黄长帅.机械研磨对离子吸附型稀土矿矿石中稀土赋存形态的影响[J].有色金属工程,2024,14(3):.

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