Abstract:In order to optimize the grinding operations and relieve the contradiction between over grinding of cassiterite and deficient grinding of sulphide ore, the influence of the parameters such as grinding feed size, grinding time and grinding concentration on the size fraction yield and the metal distribution were studied in this paper. The results show that the grinding feed size has important influence on grinding effect. Compared with -2 mm and -3 mm, -2 mm feed size is good to grinding. Different metal distribution variations is mainly similar following the grinding time. The metal distributions of Sn, Zn, Pb, Fe of coarse size fraction reduces and the metal distribution of small size fraction raises with increasing the grinding time. The grinding effect is gradually improved when the grinding concentration is varied from 50% to 75%. After 75%, the grinding effect will deteriorate. It is that the contradiction between the over grinding of cassiterite and the deficient grinding of sulphide ore is relieved effectively and the grinding effect is better than other conditions in the conditions of the grinding feed size -2 mm, the grinding time 4~6 min and the grinding concentration 75%.