Abstract:Hunan tungsten dressing plant WO3 ore grade is 0.42%. The original process use fusel alcohol BK205 as foaming agent, foam of flotation is small, the foam layer is thin, brittle, which is not conducive to the two flotation. Otherwise, it is difficult to further improve the concentrate grade. In order to realize the efficient recovery of tungsten minerals, we use BK205 combine with CU. Test results show that in the combined ratio of 3∶1, the first BK205 after CU dosing mode, small closed-circuit test concentrate WO3 grade is 30.13%, the recovery rate is 78.98%. Compared with the original process, combination of foaming agent can not only improve the flotation foam, reduce the dosage and the cost of reagents, but also can obtain the original industrial index than the better foaming agent, the tungsten minerals are more effective recycling. Also, this work laid the foundation for the development of composite foaming agent.