十二胺体系中铁离子对霓石浮选的影响及其作用机理

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李明阳^1,2，皇甫明柱¹，胡义明^1*，刘军³，高翔鹏¹，刘文宝⁴

1. 安徽工业大学冶金工程学院，安徽马鞍山 243032 2. 安徽工业大学冶金减排与资源综合利用教育部重点实验室，安徽马鞍山 2430323. 中钢集团马鞍山矿山研究院有限公司，安徽马鞍山 2430714. 东北大学资源与土木工程学院，辽宁沈阳 110819

收稿日期:2019-01-15修回日期:2019-03-17出版日期:2019-10-22发布日期:2019-10-22
通讯作者:胡义明

基金资助:高芳烃高含氮重油催化转化反应基础研究;安徽省重点研究和开发计划项目;安徽省重点研究和开发计划项目;安徽工业大学青年基金项目

The effect and mechanism of iron ion on flotation of aegirite in dodecylamine system

Mingyang LI^1,2, Mingzhu HUANGFU¹, Yiming HU^1*, Jun LIU³, Xiangpeng GAO¹, Wenbao LIU⁴

1. School of Metallurgy and Resource, Anhui University of Technology, Ma?anshan, Anhui 243032, China
2. Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Ministry of Education, Anhui University of Technology, Ma?anshan, Anhui 243032, China
3. Sinosteel Ma?anshan Institute of Mining Research Co., Ltd., Ma?anshan, Anhui 243071, China
4. School of Resources & Civil Engineering, Northeastern University, Shenyang, Liaoning 110819, China

Received:2019-01-15Revised:2019-03-17Online:2019-10-22Published:2019-10-22

摘要/Abstract

摘要： 以十二胺(DDA)为捕收剂，通过单矿物浮选实验考察了不同矿浆pH值和铁离子浓度下霓石的浮选行为，利用人工混合矿浮选实验研究了铁离子对霓石?镜铁矿分离效果的影响。结合Zeta电位检测、Fe3+水解组分浓度计算、玻尔兹曼理论分析和分子动力学模拟研究了在DDA体系中铁离子对霓石的抑制机理。结果表明，铁离子对霓石的可浮性抑制作用较大，在pH=6.8及DDA浓度3.6×10?4 mol/L、无铁离子条件下，霓石回收率高达75.72%，溶液中铁离子浓度为3.0×10?4 mol/L时，霓石回收率仅为25.32%，同时人工混合矿浮选泡沫产品中铁品位由34.20%降低至28.71%，回收率由33.29%降低至18.35%。pH=3~11时，铁离子以荷正电的羟基络合物沉淀形式吸附在霓石表面，增大了霓石的亲水性，降低了霓石的可浮性，铁离子在霓石表面吸附使霓石零电点由2.14增至6.70，表面正电性增大减弱了阳离子捕收剂DDA与霓石表面的静电吸附，使霓石界面层内的RNH3+浓度小于界面层外，DDA吸附层松散程度增大，霓石(110)面法线方向DDA浓度分布向正方向偏移，造成霓石可浮性下降。

引用本文

李明阳皇甫明柱胡义明刘军高翔鹏刘文宝. 十二胺体系中铁离子对霓石浮选的影响及其作用机理[J]. 过程工程学报, 2019, 19(5): 1014-1021.
Mingyang LI Mingzhu HUANGFU Yiming HU Jun LIU Xiangpeng GAO Wenbao LIU. The effect and mechanism of iron ion on flotation of aegirite in dodecylamine system[J]. Chin. J. Process Eng., 2019, 19(5): 1014-1021.

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