新型酯基季铵盐阳离子捕收剂M-3的浮选行为

为检验武汉理工大学相关课题组合成的新型酯基季铵盐阳离子捕收剂M-3在磁选铁精矿反浮选提铁降硅中的性能，分别以石英和磁铁矿纯矿物、酒钢公司磁选铁精矿为选别对象进行选别试验。结果表明：①矿浆温度为25 ℃、pH=7、M-3用量为360 g/t时，石英和磁铁矿纯矿物的回收率分别为94.21%和1.56%，即M-3对石英有较好的选择性捕收能力，但对磁铁矿的捕收能力很弱。②对Fe₂O₃品位为71.40%（全铁品位为49.98%）的酒钢公司磁选铁精矿进行1次反浮粗选脱硅，在矿浆温度为25 ℃、pH=7、苛性淀粉用量为200 g/t、M-3为400 g/t情况下，可获得铁品位为56.39%、回收率为75.87%的铁精矿，较好地实现了铁硅分离。③红外光谱测试表明，M-3在石英表面的吸附以物理吸附为主，但存在一定的化学吸附；量子化学计算表明，M-3较易与石英表面发生相互作用，在磁选铁精矿提铁降硅领域是一种良好的捕收剂。

Flotation Behavior of a New Ester-based Quaternary Ammonium Salt Cationic Collector M-3

In order to verify the flotation performance of a new ester-based quaternary ammonium salt cationic collector M-3，which is prepared by Wuhan University of Technology，in the field of iron-increasing and silicon-reduction，pure quartz，pure magnetite and magnetic iron concentrate of Jiugang are selected as research object.It can draw the conclusion that:①the quartz recovery was 94.21%，but magnetite recovery was only 1.56% when the dosage of M-3 was 360 g/t，slurry temperature was 25 ℃,and the pH was 7.That is，M-3 has good collecting ability for quartz，but for magnetite，it has not.②The reverse flotation of SiO2 in iron concentrates(at feed grade of 49.98%) from magnetic separation operation with M-3 cationic collector achieved good indexes:the grade of iron concentrate was 56.39% and the iron recovery was 75.87% under the optimum condition of the dosage of M-3 400 g/t，the dosage of starch 200 g/t，and the pH 7.③FTIR test showed that both physical and chemical absorption happened to M-3 and quartz，but mainly physical absorption.Quantum chemistry calculation indicated that M-3 was more likely to interact with quartz，so M-3 was an effective collector in the field of iron-increasing and silicon-reduction.