仲辛醇对苯甲羟肟酸浮选锡石的促进作用及其机理  

Promoting effect and mechanism of 2-octanol on cassiterite flotation with benzohydroxamic acid

作　　者：曹杨[1,2] 孙磊 汪清清[1,2] 王鑫 乔毅 孙伟[1,2] 何斌全 CAO Yang;SUN Lei;WANG Qing-qing;WANG Xin;QIAO Yi;SUN Wei;HE Bin-quan(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China;Hunan International Joint Research Center for Efficient and Clean Utilization of Critical Metal Mineral Resources,Changsha 410083,China;Hunan Shizhuyuan Nonferrous Metals Co.,Ltd.,Chenzhou 423037,China)

机构地区：[1]中南大学资源加工与生物工程学院,长沙410083 [2]湖南省关键金属矿产资源高效清洁利用国际联合研究中心,长沙410083 [3]湖南柿竹园有色金属有限责任公司,郴州423037

出　　处：《中国有色金属学报》2023年第12期4227-4236,共10页The Chinese Journal of Nonferrous Metals

基　　金：国家重点研发计划资助项目(2020YFC1909202)。

摘　　要：苯甲羟肟酸是目前锡石浮选中应用最广泛的捕收剂之一,但其对矿浆酸碱度敏感、在矿物表面吸附效率低等缺点导致药剂浓度大。本文在苯甲羟肟酸浮选锡石试验中,通过添加少量非离子表面活性剂仲辛醇有效提高了锡石的浮选效果,降低了苯甲羟肟酸的浓度。通过吸附量测定、表面接触角测量以及X射线光电子能谱(XPS)分析等方法探究了仲辛醇对苯甲羟肟酸浮选锡石的促进作用机理。结果表明:仲辛醇与苯甲羟肟酸通过氢键缔合共吸附于锡石表面,在提高苯甲羟肟酸吸附稳定性的同时,利用仲辛醇自身疏水性增强了锡石可浮性。将仲辛醇应用于湖南郴州某含锡尾矿再浮试验中,使锡回收率提高12%,表现出显著的促进作用。Benzohydroxamic acid is extensively used as a collector in cassiterite flotation,but its sensitivity to pulp pH and low adsorption efficiency result in a large dosage requirement.In this study,a small amount of nonionic surfactant,2-octanol,enhanced the flotation performance of cassiterite and reduced the dosage of benzohydroxamic acid in the micro-flotation tests.Adsorption experiments,surface contact angle measurements,and X-ray photoelectron spectroscopy(XPS) analyses were conducted to investigate the promotion mechanism of 2-octanolon cassiterite flotation with benzohydroxamic acid.The results indicate that 2-octanol and BHA can coadsorb on the surface of cassiterite through hydrogen bonding.This interaction improves the adsorption stability of BHA and enhances the floatability of cassiterite,attributable to the hydrophobic nature of 2-octanol.This method was implemented for the flotation recovery of tin-bearing tailings from Chenzhou,Hunan Province.It resulted in a significant 11.93% increase in tin recovery,thereby demonstrating the remarkable promotion effect of 2-octanol.

关 键 词：锡石 仲辛醇 苯甲羟肟酸 浮选 共吸附 

分 类 号：TD95[矿业工程—选矿]