Abstract:A tungsten ore from Sichuan Province contains WO₃ 0.50 %, Cu 0.17 % and S 2.14 %. Tungsten in the ore is all present in the form of independent minerals in scheelite. Scheelite is the main recovered metal mineral, followed by chalcopyrite. According to the composition and dissemination characteristics of scheelite and gangue minerals in the ore, the principle process of " sulfide ore flotation-scheelite roughing at room temperature-scheelite heating cleaning " was adopted. The experimental study on the conditions of sodium carbonate dosage, water glass dosage, collector type and dosage, heating sodium hydroxide dosage and heating water glass dosage was carried out. The experimental results show that ZL collector can improve the hydrophobicity of scheelite surface, and has strong collecting ability and good selectivity. The method of heating concentration can effectively inhibit the calcium-containing gangue minerals and realize the effective separation of scheelite and calcium-containing gangue. On the basis of the best reagent system, the closed-circuit test of " one roughing, one scavenging, four cleaning and one cleaning " was carried out, and the scheelite concentrate with WO₃ grade of 60.45 % and recovery rate of 86.46 % was obtained, which realized the effective recovery of scheelite.