The activation mechanism of Cu(II) to ilmenite and subsequent flotation response to α-hydroxyoctyl phosphinic acid
The activation mechanism of Cu(II) to ilmenite and subsequent flotation response to α-hydroxyoctyl phosphinic acid
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DOI：
10.1016/j.jiec.2016.03.011
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发表时间：
2016-05-25
影响因子：
6.1
通讯作者：
Liu, Guangyi
中科院分区：
文献类型：
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作者：
Li, Fangxu;Zhong, Hong;Liu, Guangyi
为了获得密堆积的疏水性单分子层，采用铜离子对钛铁矿进行表面改性。通过zeta电位和XPS测量发现，铜离子改性是通过离子交换、金属氢氧化物吸附和氧化还原过程发生的。经过铜离子改性后，钛铁矿表面性质更加活跃，对α-羟基辛基次膦酸（HPA）的吸附量增加。正如预期的那样，钛铁矿的浮选行为得到改善。 XPS 测量验证了 Cu(II) 活化后在钛铁矿表面建立共价连接 HPA 的能力。本研究结果将为强化浮选提供基础依据。 (C) 2016 年韩国产业工程化学学会。由 Elsevier B.V. 出版。保留所有权利。
In order to get close-packed hydrophobic molecular monolayer, surface modification of ilmenite was carried out with cupric ions. As it was found by zeta potential and XPS measurement, the cupric ions modification occurs via ion exchange, metal hydroxides adsorption, and redox processes. After modifying by cupric ions, ilmenite surface properties became more active and the adsorption amount of alpha-hydroxyoctyl phosphinic acid (HPA) increased. As expected, the flotation behaviour of ilmenite improved. XPS measurements verified the ability to establish a covalently attached HPA on the surfaces of ilmenite after Cu(II) activation. The findings of this study will provide a fundamental basis for strengthening flotation. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.