The Direct Leaching of Nickel Sulfide Flotation Concentrates – A Historic and State-of-the-Art Review Part III: Laboratory Investigations into Atmospheric Leach Processes

The following review is Part III of a series concerned with the direct hydrometallurgical processing nickel sulfide flotation concentrates. In first part this series, piloted leaching processes and commercial operations that employed were comprehensively reviewed. second laboratory investigations into pressure concentrates critically analyzed. nickeliferous at ambient are reviewed, challenges research opportunities in summarized. majority published studies on atmospheric have focused chloride media due to faster kinetics lixiviants relative sulfate media; bioleaching perceived environmental advantages over other systems; pyrometallurgical pre-treatments render refractory minerals more amenable subsequent leaching.