选钼回水中铝离子对辉钼矿可浮性的影响机制

doi:10.12034/j.issn.1009-606X.217347

过程工程学报 ›› 2018, Vol. 18 ›› Issue (3): 595-599.DOI: 10.12034/j.issn.1009-606X.217347

选钼回水中铝离子对辉钼矿可浮性的影响机制

李慧1，何廷树1*，靳建平2，张崇辉1，王真1，袁航1

1. 西安建筑科技大学材料与矿资学院，陕西西安 710043；2. 西安西北有色地质研究院有限公司，陕西西安 710054

收稿日期:2017-10-09 修回日期:2017-11-03 出版日期:2018-06-22 发布日期:2018-06-06
通讯作者: 李慧 276728309@qq.com
基金资助:
国家自然科学基金青年项目

Influence Mechanism of Al3+ from Recycled Water of Mineral Processing on Floatability of Molybdenite

Hui LI1, Tingshu HE1*, Jianping JIN2, Chonghui ZHANG1, Zhen WANG1, Hang YUAN1

1. College of Material and Resource, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710043, China; 2. Xi?an Northwest Geological Institute Company of Nonferrous Metals Co., Ltd., Xi?an, Shaanxi 710054, China

Received:2017-10-09 Revised:2017-11-03 Online:2018-06-22 Published:2018-06-06

摘要/Abstract

摘要： 通过辉钼矿浮选实验、Zeta电位测试、Al3+溶液化学分析及X射线光电子能谱分析(XPS)，研究了选钼回水中的Al3+对辉钼矿可浮性的影响及其作用机制. 结果表明，铝离子会恶化辉钼矿的浮选指标，并导致其表面Zeta电位显著偏移，表明辉钼矿表面有Al3+吸附；Al3+在溶液中主要以铝离子、羟基铝离子、氢氧化铝沉淀形式存在，后两者具有极强的极性，能吸附在辉钼矿活泼的“棱”上，铝离子与辉钼矿“棱”氧化生成的MoO42?反应生成钼酸铝沉淀；由于辉钼矿“棱”的面积比“面”的面积小很多，而铝离子主要吸附在“棱”上，因此铝元素含量不多，但其确实能吸附在辉钼矿表面，且既有物理吸附也有化学吸附.

关键词: 辉钼矿, 回水, Al3+, 溶液化学分析, 电动电位, XPS分析

Abstract: The influences of Al3+ from recycled water of mineral processing on molybdenite floatability and its mechanism of action were systematically studied, through flotation tests of molybdenite, measurement of electric potential, Al3+ solution chemical analysis, and X-ray photoelectron spectroscopy (XPS). The results indicated that Al3+ can worsen the flotation index of the molybdenite and lead to a significant deviation of its surface potential, indicating that there is lots of Al3+ adsorption on the surface of molybdenite. Al3+ in solution mainly exists in the forms of aluminum ion, hydroxy aluminum ion and aluminum hydroxide. Hydroxy aluminium ion, aluminum hydroxide precipitation with a strong polarity, can adsorb on lively “edge” of molybdenite, and the aluminum ions can produce chemical reaction with MoO42? because of molybdenite “edge” oxide generated. With the reason of the area of “edge” much smaller than that of “face”, the aluminum ions are mainly adsorbed on the “edge”, so the content of aluminum is not much, but the aluminum ions can adsorb on the surface of molybdenite, indeed both physical adsorption and chemical adsorption.

Key words: molybdenite, flotation, Al3+, Solution chemical analysis, electric potential, XPS analysis

李慧何廷树靳建平张崇辉王真袁航. 选钼回水中铝离子对辉钼矿可浮性的影响机制[J]. 过程工程学报, 2018, 18(3): 595-599.

Hui LI Tingshu HE Jianping JIN Chonghui ZHANG Zhen WANG Hang YUAN. Influence Mechanism of Al3+ from Recycled Water of Mineral Processing on Floatability of Molybdenite[J]. Chin. J. Process Eng., 2018, 18(3): 595-599.

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选钼回水中铝离子对辉钼矿可浮性的影响机制

Influence Mechanism of Al3+ from Recycled Water of Mineral Processing on Floatability of Molybdenite

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