新型常温捕收剂DX-1对石英的浮选性能研究及机理分析

为解决赤铁矿阴离子反浮选脱硅过程中矿浆加热引起的能耗高等问题, 以月桂酸和液溴为原料, 采用催化加成法合成了一种新型常温阴离子捕收剂DX-1。通过石英单矿物浮选试验、石英和赤铁矿的人工混合矿浮选试验, 考察了DX-1的捕收性能, 试验结果表明:在常温条件下, DX-1对石英的捕收能力较强, 当pH=11.5时, 石英单矿物浮选试验可以取得石英回收率99.49%的指标, 人工混合矿浮选试验可得到精矿TFe品位65.91%、回收率98%的选别指标。并通过红外光谱及动电位等测试分析方法探讨了其作用机理, 结果表明:捕收剂DX-1与石英表面主要发生了化学吸附, 除此以外可能还存在静电吸附。这说明DX-1是一种可用于铁矿反浮选的新型高效常温阴离子捕收剂。 

Study on the Flotation Performance of a New Type of Atmospheric Collector DX-1 for Quartz

In order to solve the problem of high energy consumption caused by slurry heating during the desilication process of anionic reverse flotation of hematite, lauric acid and liquid bromine are used as raw materials.A new type of anionic collector DX-1 was synthesized by catalytic addition method.The collecting performance of DX-1 was investigated through quartz flotation tests, quartz and hematite artificial mixed flotation tests.The test results show that:at room temperature, DX-1 has strong ability to collect quartz.When pH=11.5, the quartz single mineral flotation test can obtain the index of 99.49% of the recovery rate of quartz, and the flotation test of artificial mixed ore can get the selection index of 65.91% of iron ore grade and 98% of recovery.The mechanism of action was discussed by means of infrared spectroscopy and potentiodynamic analysis.The results show that:There is mainly chemical adsorption on collector DX-1 and quartz surface.Besides, electrostatic attraction and hydrogen bonding may exist.It indicates that DX-1 is a new type of highly efficient anionic collector at room temperature.