水杨羟肟酸体系中铜离子活化浮选锡石作用机制  

Effect mechanism of copper ion on cassiterite flotation behavior in salicylic hydroxamic acid system

作　　者：汪泰 刘殿文[1] 王成行 申培伦 胡真 蔡锦鹏 杨凯志 WANG Tai;LIU Dian-wen;WANG Cheng-hang;SHEN Pei-lun;HU Zhen;CAI Jin-peng;YANG Kai-zhi(Yunnan Key Laboratory of Green Separation and Enrichment of Strategic Mineral Resources,Kunming University of Science and Technology,Kunming 650093,China;Institute of Resource Utilization and Rare Earth Development,Guangdong Academy of Sciences,Guangzhou 510650,China;State Key Laboratory of Rare Metals Separation and Comprehensive Utilization,Guangzhou 510650,China;Guangdong Provincial Key Laboratory Development and Comprehensive Utilization of Mineral Resources,Guangzhou 510650,China)

机构地区：[1]昆明理工大学、云南省战略金属矿产资源绿色分离与富集重点实验室,昆明650093 [2]广东省科学院资源利用与稀土开发研究所,广州510650 [3]稀有金属分离与综合利用国家重点实验室,广州510650 [4]广东省矿产资源开发与综合利用重点实验室,广州510650

出　　处：《中国有色金属学报》2023年第9期3013-3022,共10页The Chinese Journal of Nonferrous Metals

基　　金：国家重点研发计划资助项目(2019YFC1904202);国家自然科学基金资助项目(91962215)。

摘　　要：通过单矿物浮选试验,考察了水杨羟肟酸(SHA)溶液体系下矿浆pH、Cu^(2+)和SHA用量等因素对锡石浮选行为的影响;借助Zeta电位、AFM以及XPS测试研究了水杨羟肟酸体系中Cu^(2+)活化锡石的机理。结果表明:当SHA浓度为0.52 mmol/L、Cu^(2+)浓度为0.45 mmol/L、pH值约为7.2时,锡石的回收率达到82.95%,回收率较SHA直接浮选体系提高12.89%。Zeta电位和XPS测试结果均表明,SHA在锡石表面主要发生化学吸附,在铜离子活化作用下,铜离子可以通过吸附或者取代作用改善锡石羟基化表面,生成Cu、Sn活性质点,通过直接和间接作用促进了SHA在锡石表面的吸附,生成了稳定的螯合物,提高了锡石的可浮性。The impact of pulp pH,Cu^(2+)and SHA dosage on cassiterite flotation behavior within the salicylhydroxamic acid(SHA)solution system was examined through single mineral flotation tests.The mechanism underlying Cu^(2+)activation of cassiterite in salicylhydroxamic acid was investigated using Zeta potential,AFM,and XPS analyses.The results reveal that,with the SHA concentration of 0.52 mmol/L,the Cu^(2+)concentration of 0.45 mmol/L,and the pH of approximately 7.2,the recovery of cassiterite achieves 82.95%,which is 12.89%higher than that of the SHA direct flotation system.Both Zeta potential and XPS test results indicate that SHA primarily chemisorbs onto the surface of cassiterite,with the activation of copper ion,the hydroxylated surface of cassiterite is enhanced through adsorption or substitution,leading to the formation of Cu and Sn active particles.In a combined direct and indirect process,SHA is adsorbed on the surface of cassiterite and forms a stable chelate,thus improving the floatability of cassiterite.

关 键 词：锡石 水杨羟肟酸 浮选机理 活化 吸附 

分 类 号：TD954[矿业工程—选矿]