Abstract: The invariable medicament of tungsten flotation has been taken since Hunan copper tungsten separation plant was built，however the pulp temperature will influence the tungsten concentrate index.The flotation index is non-ideal during the period from late autumn to the next early spring.In order to stabilize the performance of tungsten recovery，decrease the tungsten resources waste，and promote the production achievement，medicament optimization research was carried out by taking copper-sulphur bulk flotation tailings as the sample.The results show that the new combination collector ZL-B+LDZ is suitable for the low temperature scheelite flotation of this sample.When the pulp temperature is 10 ℃，the optimum mass ratio of ZL-B to LDZ is 3〖DK（〗∶〖DK）〗2.When the temperature increases，a stable and ideal tungsten concentrate index can be achieved by decreasing the dosage of LDZ and increasing the dosage of ZL-B to fit with the temperature change.With the equal dosage of ZL-B+LDZ to on-site ZL-B，and slurry temperature at 10 ℃，the concentrate tungsten grade is increased by 0.97 percentage points，but also the tungsten recovery raised by 25.67 percentage points.

Key words: Scheelite, Low temperature flotation, Combination collectors ZL-B+LDZ, ZL-B