Extremely Low Grade Tungsten Ore Recovery Process

The existing literature on recovering tungsten from tungsten tailings has reported that the content of WO₃ in tailings is more than 0.2%, which is relatively high tungsten containing tungsten tailings, and the tungsten minerals are selected by wet leaching and flotation, which not only needs grinding, adding medicaments, high cost, but also causing environmental pollution; and using magnetism. The method of recovery of wolframite requires energy consumption and relatively high cost.

In order to solve the above problems, some scholars have proposed a process for recovering tungsten from extremely low grade tungsten ore or tungsten tailing. Its characteristics include buffer pool grading, roughing slots coarse selection, rocking bed coarse selection, chute chute selection, and rocking bed cleaning process. 2 buffer pools, 10~15 chute chute grooves, 2~4 spiral chutes, and 1 rocking bed 1 are selected. 0~15, the mass percentage of WO₃ in the very low grade tungsten bearing tailings was 0.04 to 0.08%. The concrete steps are as follows:

(1)The very low grade tungsten tailing is transported to the buffer pool, and the concentration concentration of the slurry quality is 15 ~ 25%. The settlement distance is judged according to the size and density of the tailings, and two pipes are connected to the upper and bottom of the buffer pool, and the 0.15mm is divided into two grain levels to recover the target minerals.

(2)The tungsten tailings with grain size greater than 0.15mm flow from the bottom pipe into the coarse selection process of the rocking bed, and the coarse ore concentrate of the rocking bed is the final tungsten concentrate, the coarse selection of the tailings of the rocking bed to the channie chute, and the coarse selection of the rocking bed into the shaking bed cleaning process; the fine ore of the rocking bed cleaning is the final tungsten concentrate and the medium ore swept by the rocking bed. The tailings are selected to the rouge chute and the tailings are selected as the final tailings.

(3)The tungsten tailings with grain size less than 0.15mm flow from the upper pipe of the buffer pool into the roughing chute chute process. The tailings of the channie chute slots are the final tailings, and the coarse selected concentrate of the channie chute enters the buffer pool two. When the buffer Chi Erzhong's pulp reaches a certain amount, it opens the spiral chute to select ore concentrates and selected concentrate. For the final tungsten concentrate, the tailings of the spiral chute are swept into the rocking bed, and the medium ore of the rocking bed cleaning is returned to the flannel chute to carry out coarse selection. The concentrate of the rocking bed cleaning is the final tungsten concentrate, and the tailings selected by the rocking bed are the final tailings.

The technological combination can achieve the effective recovery of tungsten in extremely low grade tungsten bearing tailings, without grinding, low energy consumption, no environmental pollution caused by drugs, simple technology and easy to realize, and can maximize the comprehensive utilization of tungsten resources.

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