酸性条件下十二胺体系中Fe-(3+)对白云母可浮性的影响.pdf

第6期
矿ア保与用
2015年12月
CONSERVATION AND UTILIZATION OF MINERAL RESOURCES
Dec.2015
酸性条件下十二胺体系中Fe+对白云母可浮性的影响
王宇斌,余乐,张威,王花,张小波,彭祥玉
西安建筑科技大学材料与矿资学院,映西西安710055)
摘要:通过单矿物试验、溶液化学计算、动电位测试、红外光谱分析以及XPS分析,研究了在酸性条件下十
二胺体系中Fe*对白云母的抑制作用机理。结果表明,浓度为3x10-mol/.的Fe可使白云母的零电点
从1.6増加到2.4。在pH=4时,随着Fe浓度的増大,白云母动电位正向移动。十二胺在白云母表面的吸
附状态为物理吸附。Fe在白云母表面产生静电吸附,并以Fe(OH)3沉淀的形式罩盖在白云母表面并减少
白云母表面暴露的i原子数日,导致十二胺在白云母表面的吸附量减小从而抑制白云母的浮选行为。当
Fe3+的浓度为1x10-3mol/L时,可使白云母的回收率降低12%。
关键词:白云母;十二胺;Fe+;抑制
中图分类号:TD973+.4文献标识码:B文章编号:1001-0076(2015)06-0040-06
DO1:10.13779/j.cnki.issn1001-0076.2015.06.008
Effect of Fe on Floatability of Muscovite in Dodecylamine
/stem and Acidic Conditio
WANG Yubin, YU Le, ZHANG Wei, WANG Hua, ZHANG Xiaobo, PENG Xiangyu
School of Materials and Mineral Resources, Xi an niversity of Architecture and Technology, Xi an
710055, Shaanxi, China)
Abstract The inhibition mechanism of Fe" in muscovite flotation was investigated with pure min
eral flotation tests, solution chemistry analysis, zeta potential measurement, IR spectrum measure
ment and XPS analysis in dodecylamine system and acidic condition. The results showed that the ze
ro potential of muscovite increased from 1. 6 to 2. 4 when the concentration of Fe''was 3 x 10
mol/L. It was found that zeta potential of muscovite shifted towards the positive direction with the
increasing concentration of Fe" in PH value of 4. Dodecylamine was physical adsorption and Fe
was the electrostatic adsorption on the surface of muscovite. the decrease of visible Si caused by Fe
(OH) over the surface of muscovite, which lowed the adsorption capacity of dodecylamine on the
surface of muscovite, likewise, produced inhibition in muscovite flotation. When the concentration of
Fe* was 1 x 10 - mol/L, the recovery rate declined 12%
Key words: muscovite; dodecylamine; Fe"; inhibition
我国白云母矿储量丰富,但优质片状白云母相对短缺,国内优质白云母来源主要依靠进口。因此,
*收稿日期:2015-10-10
基金项目:基金项目:西安建筑科技大学人オ基金项目(RC1472);西安建筑科技大学学科建设重点培育学科专项基金
项目(XK201205)。
作者简介:王宇斌(1972-),男,河南偃师人,博士,副教授,从事非金属矿高效分选及资源综合利用研究。
通讯作者:余乐(1989-),女,映西临潼人,硕士研究生,从事非金属矿高效分选及资源综合利用研究。