溶剂合成法强化硫氮丙腈酯低温捕收性能的机理研究  

Mechanism of Solvent Synthesis Method for Enhancing the Low-temperature Harvesting Performance of Thiazapropionitrile Ester

作　　者：卜显忠[1] 陈帆帆 张崇辉[1] 陈伟[1] 杨璐[1] BU Xianzhong;CHEN Fanfan;ZHANG Chonghui;CHEN Wei;YANG Lu(Xi’an University of A rchitecture and Technology,College of Resources Engineering,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学资源工程学院

出　　处：《有色金属工程》2020年第1期69-75,共7页Nonferrous Metals Engineering

基　　金：中国博士后科学基金(2018M640964);陕西省教育厅自然科学专项(18JK0473,028155386)~~

摘　　要：针对低温条件下以酯-105为代表的硫氮丙腈酯类捕收剂浮选指标不理想的现状,以二甲基亚砜为溶剂,利用溶剂合成法合成了一种硫氮丙腈酯类捕收剂BL。浮选试验表明温度对两种捕收剂的浮选指标都有影响,但对BL影响较小,BL低温条件下的捕收性能明显优于酯-105。红外光谱分析表明,BL在黄铜矿表面发生化学吸附,BL与铜离子发生吸附的活性点主要是二硫代羧基。应用激光粒度分析仪对比分析BL和酯-105在水中弥散性发现,在不同温度下,BL在水中的粒径均小于酯-105,而这种差异在低温下尤其明显。说明溶剂合成法能够提高硫氮丙腈酯类捕收剂的低温弥散性,从而提高其低温捕收性能。In view of the unsatisfactory flotation index of thioazapropionitrile ester collectors represented by Ester-105 under low temperature conditions,a thiazapropionitrile Ester named BL was synthesized by solvent synthesis method using dimethyl sulfoxide as a solvent.The flotation experiments show that the temperature has an effect on the flotation indexes of both collectors,but has a small effect on BL.The collection performance of BL under low temperature conditions is significantly better than that of Ester-105.Infrared spectroscopy analysis shows that BL has chemical adsorption on the surface of chalcopyrite,and the active sites for BL and copper ions adsorption are mainly dithiocarboxyl groups.Alaser particle size analyzer was used to compare the dispersion of BL and Ester-105 in water.It was found that the particle size of BL in water was smaller than that of Ester-105 at different temperatures,and this difference was especially obvious at low temperatures.It is indicated that the solvent synthesis method can improve the low-temperature dispersibility of thiazepine propionitrile ester collectors,thereby improving its low-temperature collection performance.

关 键 词：BL 酯-105 溶剂合成法 弥散性 低温 

分 类 号：TD923.1[矿业工程—选矿]