Flotation and adsorption of quaternary ammonium salts collectors on kaolinite of different particle size
Flotation and adsorption of quaternary ammonium salts collectors on kaolinite of different particle size
复制标题
DOI：
10.1016/j.ijmst.2013.04.011
复制
发表时间：
2013-03-01
影响因子：
11.8
通讯作者：
Chen Haochuan
中科院分区：
文献类型：
--
作者：
Jiang Hao;Liu Guorong;Chen Haochuan
研究了癸基三甲基氯化铵(103C)、十二烷基三甲基氯化铵(DTAC)、十四烷基三甲基氯化铵(TTAC)和十六烷基三甲基氯化铵(CTAC)在不同粒度级高岭石上的浮选行为。采用紫外分光光度法测定了捕收剂在高岭石上的吸附量和吸附等温线，对季胺在高岭石-水界面的吸附进行了深入研究。浮选结果表明，以103C、DTAC、TTAC和CTAC为捕收剂时，不同颗粒级数高岭石的浮选回收率随着pH值的增加而增加。随着捕收剂浓度的增加，浮选回收率增加。高岭石的粒度对浮选有很大影响。细粒高岭石的浮选回收率随着季铵盐捕收剂碳链的增加而降低，而粗粒高岭石则相反。吸附量测试和吸附等温线表明，随着高岭石粒径的增大或季铵盐碳链长度的增加，吸附量增大。在浮选捕收剂浓度范围内，烃链越长，越有可能被细小的高岭石颗粒绝对吸附，本体中捕收剂浓度越低，导致浮选回收率较低。 (C) 2013 年，Elsevier B.V. 代表中国矿业大学出版。
The flotation behaviors of decyltrimethylammonium (103C), dodecyltrimethylammonium chloride (DTAC), tetradecyltrimethylammonium chloride (TTAC) and cetyltrimethylammonium chloride (CTAC) on kaolinite of different particle size fraction were studied. The adsorbed amount and adsorption isotherms of collectors on kaolinite were determined for painstaking investigation into the adsorption of quaternary amines at kaolinite-water interface by ultraviolet spectrophotometer methods. The flotation results show that the flotation recovery of kaolinite of different particle fraction increases with an increase in pH when 103C, DTAC, TTAC and CTAC are used as collectors. As the concentration of collectors increases, the flotation recovery increases. Particle size of kaolinite has a strong effect on flotation. The flotation recovery of fine kaolinite decreases with the carbon chain of quaternary ammonium salts collectors increasing, while coarse kaolinite is on the contrary. The adsorbed amount tests and adsorption isotherms show that adsorbed amount increases when the particle size of kaolinite increases or when the carbon chain length of quaternary ammonium salts increases. Within the range of flotation collector concentration, the longer the hydrocarbon chain, the more probable to be absolutely adsorbed by fine kaolinite particles and then the lower the collector concentration in the bulk, which leds to lower flotation recovery. (C) 2013 Published by Elsevier B. V. on behalf of China University of Mining & Technology.