Abstract: During grinding processing of sulfide minerals,a series of complex physical and chemical actions that are crucial to subsequent mineral processing. Firstly,the physical and chemical effects of grinding media and minerals involved in the sulfide ore grinding system are summarized. On this basis,the influence of grinding conditions such as grinding equipment,medium properties,process parameters and environment on the physical comminution,mechanochemical action and electrochemical action of grinding are discussed,including changing particle size distribution,crystal structure and surface properties of grinding products,pulp chemical properties such as pH,dissolved oxygen,potential and ion concentration,as well as mineral flotation. Among them,the changes of mineral properties and pulp chemical properties are the main factors that affect the subsequent mineral flotation. Therefore,the grinding system should purposefully create good particle surface physical and chemical properties and pulp chemical environment for the subsequent flotation process,which is the key factor to achieve efficient separation of sulfide minerals.

Key words: grinding,sulfide minerals,electrochemistry,mechanochemistry,flotation