3-戊基-4-氨基-1,2,4-三唑-5-硫酮浮选分离黄铜矿与闪锌矿及其机理

Flotation Separation of Chalcopyrite from Sphalerite with 3-amyl-4-amino-1,2,4-triazole-5-thione and Its Underlying Mechanism

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.