Abstract: Through the introduction of the ore property and the check of the flow-sheet，the main factors affecting the recovery of lead-zinc ores are proposed，including the unstable raw ore's nature，high over-grinding rate，not ideal performance of recovery equipment and pharmaceutical system on the recovery of super fine minerals. And such proposals to increase the recovery of lead-zinc ores are given as: keeping rational ore blending to stabilize the ore nature,selecting reasonable grinding medium to improve the uniformity of the particle size of grinding,adopting fine mesh instead of hydrocyclones to increase the efficiency of classification,increasing the recovery of useful fine minerals.

Key words: Huize Pb-Zn mine, Recovery, Over grinding, Ore blending, Grinding medium, Fine mesh, Selective flocculation