Colloidal Precipitates as Activators and Depressants in Flotation
Organization: The Australasian Institute of Mining and Metallurgy
Jan 1, 1973
Adsorption isotherms, zeta potential and coagulation techniques have been used to exa- mine the mechanism of metal activation on SiO2 and ZnS surfaces. The importance of surface nucleation or precipitation of metal hydroxide coatings is'established and identified-by characteristic charge reversal patterns. The significance of surface coatings in sulphide and non-sulphide flotation is discussed.