H酸单钠盐在石墨与闪锌矿浮选分离中的选择性抑制机理  

Selective depressing mechanism of H-acid monosodium salt on flotation separation of graphite and sphalerite

作　　者：曾勇 王翠[1,2] 何剑锋 华中宝 程恺 伍喜庆 孙伟[1,2] 王丽[1,2] 胡家城[3] 唐鸿鹄[1,2] Yong ZENG;Cui WANG;Jian-feng HE;Zhong-bao HUA;Kai CHENG;Xi-qing WU;Wei SUN;Li WANG;Jia-cheng HU;Hong-hu TANG(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China;Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources,Central South University,Changsha 410083,China;State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,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]中南大学战略含钙矿物资源清洁高效利用湖南省重点实验室,长沙410083 [3]中国科学院过程工程研究所多相复杂系统国家重点实验室,北京100190

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第12期3812-3824,共13页中国有色金属学报（英文版）

基　　金：supported by the National Key R&D Program of China(Nos.2022YFC2904501,2019YFC1907803);the National Natural Science Foundation of China(No.52004335);the Open Sharing Fund for Large-scale Instruments and Equipment of Central South University,China(No.CSUZC202132);the Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources,China(No.2018TP1002)。

摘　　要：采用纯矿物浮选实验、傅里叶变换红外光谱(FT-IR)测试、Zeta电位测试、X射线光电子能谱(XPS)分析和分子动力学模拟研究H酸单钠盐(HAMS)存在下石墨和闪锌矿的浮选行为和分离、抑制机理。在最佳浮选条件下,混合浮选精矿中闪锌矿和石墨的回收率分别为93.37%和4.98%。Zeta电位测试和XPS分析表明,HAMS大量吸附在石墨表面,而在闪锌矿表面几乎不吸附。FT-IR测试表明,HAMS在石墨表面没有明显的化学吸附。分子动力学模拟结果表明,HAMS中的萘环与石墨之间的疏水相互作用是导致HAMS吸附在石墨表面的主要原因。Micro-flotation experiments,Fourier transform infrared spectroscopy(FT-IR)tests,Zeta potential tests,X-ray photoelectron spectroscopy(XPS)analysis and molecular dynamics simulation were used to study the flotation behavior,separation and depressing mechanisms of graphite and sphalerite in the presence of H-acid monosodium salt(HAMS).Under the optimum flotation conditions,the recovery of sphalerite and graphite in the concentrate of mixed mineral flotation was 93.37% and 4.98%,respectively.Zeta potential tests and XPS analysis indicated that HAMS was considerably adsorbed on graphite surfaces but virtually absent on sphalerite surfaces.The FT-IR tests revealed that HAMS had no significant chemisorption on graphite surfaces.Molecular dynamics simulation inferred that the hydrophobic interaction between the naphthalene ring in HAMS and graphite was responsible for the adsorption of HAMS on the graphite surface.

关 键 词：H酸单钠盐 石墨 闪锌矿 浮选分离 分子动力学模拟 

分 类 号：TD923[矿业工程—选矿]