Effective recovery of chalcopyrite at low temperatures using modified ester collector  

采用改性酯类捕收剂在低温条件下有效回收黄铜矿

作　　者：Xian-zhong BU Yuan-yuan FENG Ji-wei XUE Lu YANG Chong-hui ZHANG 卜显忠;冯媛媛;薛季玮;杨璐;张崇辉(西安建筑科技大学资源工程学院,西安710055;青海省高原矿物加工工程与综合利用重点实验室,西宁810000;矿物加工科学与技术国家重点实验室,北京100260)

机构地区：[1]School of Resources Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China [2]Key Laboratory of Plateau Mineral Processing Engineering and Comprehensive Utilization in Qinghai Province,Xining 810000,China [3]State Key Laboratory of Mineral Processing,Beijing 100260,China

出　　处：《Transactions of Nonferrous Metals Society of China》2022年第1期296-306,共11页中国有色金属学报（英文版）

基　　金：financial supports from the National Natural Science Foundation of China(No.52074206);the Talent Science and Technology Fund of Xi’an University of Architecture and Technology,China(No.ZR19062);the Open Foundation of State Key Laboratory of Mineral Processing,China(No.BGRIMM-KJSKL-2021-19);the Natural Science Basic Research Plan in Shaanxi Province of China(No.2021JQ-507);the Special Research Project of Shaanxi Education Department,China(No.21JK0731);the Key Program for International S&T Cooperation Projects of Shaanxi Province,China(No.2021KWZ-16);the Natural Science Foundation of Qinghai Province,China(No.2021-ZJ-975Q)。

摘　　要：The effect of a modified ester collector named as BL on the flotation of chalcopyrite at low temperatures was investigated by micro-flotation tests,contact angle measurements,adsorption experiments,laser particle size analysis,cryogenic transmission electron microscopy(Cryo-TEM)and Fourier transform infrared(FTIR)analyses.Micro-flotation tests proved that the collecting ability of BL for chalcopyrite was significantly better than that of N,N-diethyl dithiocarbamate propiononitrile ester(ester-105)at low temperatures.Combined with laser particle size,Cryo-TEM and FTIR analyses,it was found that the particle size of BL in water was smaller than that of ester-105,and the distributed density of BL was higher than that of ester-105 at low temperatures,indicating that BL dispersed well at low temperatures.Therefore,BL was more easily adsorbed on the chalcopyrite surface and improved the surface hydrophobic degree of chalcopyrite,which were also confirmed by the contact angle measurements and adsorption experiments.通过单矿物浮选试验、接触角测试、药剂吸附量试验、粒度分析、冷冻透射电镜和红外光谱分析,考察改性酯类捕收剂(BL)在低温条件下对黄铜矿浮选的影响。单矿物浮选试验结果表明,在低温条件下,BL对黄铜矿的捕收能力明显优于酯105。结合粒度分析、冷冻透射电镜及红外光谱分析结果,在低温条件下,BL在水溶液中的粒度小于酯105的,而分布密度大于酯105的,这表明BL在低温条件下分散性更好。因此,BL更容易吸附在黄铜矿表面,从而提高其表面疏水程度,该结果也通过接触角测试和药剂吸附量试验得以证实。

关 键 词：modified ester collector chalcopyrite flotation collecting ability DISPERSIVITY low temperature reagent synthesis 

分 类 号：TD952[矿业工程—选矿] TD923.13