Method for increasing fine-grained wolframite ore dressing recovery ratio

Abstract

The invention relates to a method for increasing the fine-grained wolframite ore dressing recovery ratio and belongs to the field of tungsten ore dressing. The method comprises the steps that (1) fine-grained wolframite raw ore is concentrated by a thickener and subjected to low-intensity magnetic separation to remove ferromagnetic mineral aggregate such as iron, and then low-intensity magnetic tailings are obtained; (2) the low-intensity magnetic tailings are screened to remove the mineral aggregate at plus 1.2-mm size fraction and then subjected to high-intensity magnetic separation to obtain first rough concentrate and high-intensity magnetic tailings; (3) the high-intensity magnetic tailings are fed into a suspended vibration taper-face ore separator for roughing to obtain second rough concentrate; (4) the first rough concentrate and the second rough concentrate are combined and then concentrated, dewatered and classified to obtain coarse-grained mineral aggregate and fine-grained mineral aggregate; (5) the coarse-grained mineral aggregate and the fine-grained mineral aggregate pass through a coarse-grained shaking table and a fine-grained shaking table respectively, and concentrate produced by the coarse-grained shaking table and concentrate produced by the fine-grained shaking table are combined to obtain tungsten concentrate. When the technological method is adopted to treat wolframite slime with the WO3 content being 0.4-0.8%, the tungsten concentrate with the grade being 30% or so can be obtained, and the WO3 recovery ratio can reach more than 90%.

Description

technical field [0001] The invention relates to a method for improving the recovery rate of fine-grained black tungsten ore dressing, which belongs to the field of tungsten ore dressing. Background technique [0002] Due to the high specific gravity and brittle nature of wolframite, it is easy to produce slime during the mining process. In the early stage, shaking table and centrifugal gravity separation were mainly used to recover it. The bed surface of the shaker is clearly zoning and easy to operate, but the processing capacity per unit area is small, the recovery rate is low when processing fine mud, and metals are easily lost from the fine mud; although the centrifugal concentrator has a large processing capacity, it has a high recovery efficiency for fine ore particles , but its water consumption is large, the water pressure requirement is high, the control mechanism needs to be further improved, and it is difficult to obtain ideal indicators in actual industrial produ...

AI Technical Summary

Problems solved by technology

The bed surface of the shaker is clearly zoning and easy to operate, but the processing capacity per unit area is small, the recovery rate is low when processing fine mud, and metals are easily lost from the fine mud; although the centrifugal concentrator has a large processing capacity, it has a high recovery efficiency for fine ore particles , but its water consumption is large, the water pressure requirement is high, the control mechanism needs to be further improved, and it is difficult to obtain ideal indicators in actual industrial production

The researchers use gravity separation to process coarse ore and flotation to process fine mud. Although this process can effectively improve the recovery rate of tungsten, the recovery of tungsten in the flotation process has a complicated reagent system, high cost and high toxicity. and other shortcomings

The researchers later used a strong magnetic machine and a shaking table to jointly recover black tungsten in the fine mud. Although the process is simple and the recovery rate of tungsten is higher than that of the traditional method, due to the effect of strong magnetic separation on the recovery of fine-grained black tungsten Therefore, there is still the problem of high grade tungsten in tailings in industrial production

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