关键词: 铜硫尾矿, 微细粒钨, 重选—浮选联合工艺, 资源回收, 工艺优化

Abstract: In order to efficiently recover fine-grained low-grade tungsten resources from copper�sulfur tailings of Dabaoshan Concentrator in Guangdong，a comparative study of three different processes of direct flotation，full gravity separation and gravity-flotation combination is carried out in view of the technical problems in tungsten recovery.The results show that the tungsten concentrate with WO3 grade of 16.80% and WO3 recovery of 56.00% can be obtained by the traditional full flotation process. Tungsten concentrate with WO3 grade of 44.10% and WO3 recovery of 24.20% can be obtained by full gravity sepa⁃ ration process. Using the combined new process of gravity pre-concentration and tailings flotation，the ex⁃ cellent indexes of WO3 grade of tungsten concentrate of 25.17% and WO3 recovery of 55.85% are ob⁃ tained while the flotation treatment capacity is significantly reduced，and the cost of reagents is greatly reduced，which provides a feasible reference for the efficient recovery of tungsten resources in similar tailings.

Key words: copper-sulfur tailings, micro-fine tungsten, gravity separation-flotation combined pro? cess, resource recovery, process optimization