Abstract:

Tungsten minerals in the fine mud of a tungsten concentrator are mostly distributed in the

-37 μm fraction，mainly wolframite and a small amount of scheelite. Tungsten minerals are enriched to a cer⁃

tain extent in coarse fractions with low yield. The process of centrifuge desliming-mixed flotation of wolfram⁃

ite and scheelite-scheelite flotation-shaking table gravity separation was used to recover wolframite on

site，and the recovery rate of WO3 was only about 40%. In order to solve the problems of complex on-site

process flow and unsatisfactory tungsten mineral recovery effect，the separation test of the suspension vibra⁃

tion belt cleaning machine was carried out on the on-site mixed flotation concentrate. The results show that

under the conditions of feed concentration 20%，feed flow 140 kg/h，vibration speed 350 r/min and belt

speed 140 cm/min，the tungsten rough concentrate with WO3 grade of 38.13% and WO3 operation recovery

of 88.03% can be obtained by one roughing process. The suspension vibration belt cleaning machine is used

for one roughing，then the suspension vibration belt cleaning machine is used for re-selection of the rough⁃

ing middle ore. The final tungsten concentrate WO3 grade is 31.60%，the WO3 operation recovery rate is

89.88%，and the WO3 recovery rate of the on-site slime is 72.65%. The separation process of the suspension

vibration belt cleaning machine not only significantly simplifies the separation process，but also significantly

improves the recovery rate of WO3，which can guide the process flow transformation on site.

Key words:

tungsten fine mud, mixed flotation concentrate, gravity separation, suspension vibration

belt cleaning machine, process optimization