Abstract: The influences of pulp pH and different potentials on the flotation behavior of sphalerite with sodium diethyldithiocarbamate（DDTC）or butyl xanthate as collector were studied.And the adsorption capacity of sphalerite on sodium diethyldithiocarbamate（DDTC）or butyl xanthate in different pH values and different potentials were also analyzed by ultraviolet spectrum.The result showed that with the two collecting agents, the flotation of sphalerite was realized at acid conditions of less than pH4.67 and its floatability was seriously decreased with the potential lowered than the original one.The analysis results by the ultraviolet spectrum are consistent with the floatation behavior of sphalerite.

Key words: Sphalerite, Floatation, Pulp pH, Pulp potential, Ultraviolet spectrum