摘要
考察了捕收剂3-戊基-4-氨基-1,2,4-三唑-5硫酮(AATT)对黄铜矿和闪锌矿的浮选分离性能,并通过接触角、紫外光谱、吸附动力学和热力学等研究了AATT浮选分离黄铜矿和闪锌矿的作用机理。结果表明,在pH>10.0时,AATT可实现黄铜矿与闪锌矿的高效浮选分离。AATT在黄铜矿表面的吸附过程符合准二级动力学吸附方程和Langmuir等温吸附模型,为自发、吸热的化学吸附过程。pH=10.5时,AATT能显著增大黄铜矿表面疏水性,但对闪锌矿表面疏水化作用不明显,从而实现黄铜矿与闪锌矿之间的浮选分离。
Using 3-amyl-4-amino-1,2,4-triazol-5-thione(AATT)as the collector,the flotation separation of chalcopyrite and sphalerite was investigated,and the underlying mechanism was explored by studying contact angles,UV spectrum,as well as kinetics and thermodynamics of adsorption.The micro-flotation experiment shows that AATT can effectively separate chalcopyrite from sphalerite at pH>10.0.The thermodynamics and kinetics of adsorption infer that the adsorption of AATT on chalcopyrite conforms to Langmuir isothermal model and the pseudo-second-order-kinetic equation,indicating it is an endothermic and spontaneous chemical adsorption process.At pH=10.5,AATT can significantly enhance the hydrophobicity of chalcopyrite,but exerts little impact on sphalerite hydrophobization.Thus,an effective flotation separation of chalcopyrite and sphalerite can be actualized.
作者
孙辉
张志勇
王一鸣
刘锋越
刘胜
刘广义
SUN Hui;ZHANG Zhi-yong;WANG Yi-ming;LIU Feng-yue;LIU Sheng;LIU Guang-yi(School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,Hunan,China;Changsha Research Institute of Mining and Metallurgy Co Ltd,Changsha 410012,Hunan,China)
出处
《矿冶工程》
CAS
CSCD
北大核心
2021年第3期51-56,共6页
Mining and Metallurgical Engineering