Li Shoujiang, Xu Bo, Chen Peng, Zhao Yunliang, Nie Guihua, Song Shaoxian
School of Resources and Environmental Engineering, Wuhan University of Technology Luoshi Road 122 Wuhan Hubei 430070 China
Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology Luoshi Road 122 Wuhan Hubei 430070 China
RSC Adv. 2018 Jul 3;8(43):24182-24187. doi: 10.1039/c8ra04166k. eCollection 2018 Jul 2.
In order to improve the separation of sylvite and halite in SDIC Xinjiang Lop Nur potash Co. Ltd. (SLNP), in this work, the flotation kinetics of sylvite and halite under different collector dosages were investigated. It was observed that the increased speed of halite was much faster than sylvite in terms of flotation rate with an increase in octadecylamine hydrochloride (ODA) dosage. The reason for the upward floating of halite explored by SEM-EDS was that sylvite was locked with halite, thus it can float up along with sylvite. According to the analysis results, a strategy of starvation feeding the collector was employed to increase the flotation rate difference between sylvite and halite, and consequently improve the separation of sylvite and halite. It has been demonstrated that starvation feeding the collector is an efficient method for obtaining high grade sylvite, because it can not only improve the separation of sylvite and halite but also decrease the consumption of ODA in the flotation process.
为提高国投新疆罗布泊钾盐有限责任公司（SLNP）中钾盐与石盐的分离效果，本研究考察了不同捕收剂用量下钾盐和石盐的浮选动力学。结果表明，随着盐酸十八胺（ODA）用量的增加，石盐的浮选速率增加速度比钾盐快得多。通过扫描电子显微镜-能谱仪（SEM-EDS）探究石盐上浮的原因是石盐与钾盐相互嵌布，从而随钾盐一同上浮。根据分析结果，采用捕收剂分段添加策略来增大钾盐与石盐的浮选速率差异，进而提高钾盐与石盐的分离效果。结果表明，捕收剂分段添加是获得高品位钾盐的有效方法，因为它不仅能提高钾盐与石盐的分离效果，还能降低浮选过程中ODA的消耗。
