New process for efficiently sorting micro-fine particle tungsten ore through centrifugal machine and flotation

Abstract

The invention relates to a beneficiation new process for efficiently sorting micro-fine particle tungsten ore through a centrifugal machine and flotation. The implementation process comprises the following steps that after most water of tungsten fine slim is removed through concentration, the continuous ore discharge centrifugal machine is applied to desliming, tungsten middlings are obtained, meanwhile, most extremely-low-grade tailings are abandoned, and favorable conditions are created for subsequent interrupted centrifugal machine selection. The content of sulfur in the tungsten middlingsis high, and therefore flotation desulfuration is carried out. Sulfur concentrates are obtained through flotation desulfuration, the tailings are subjected to rough concentration and selection throughan interrupted centrifugal machine, and qualified tungsten concentrates are obtained. After the tailings subjected to rough concentration and selection through the interrupted centrifugal machine areconcentrated and dewatered, stirring grinding is carried out, tungsten ore is further dissociated, then flotation is carried out, and one time of rough flotation, four times of scavenging and three times of selection are achieved in the flotation process. The grade of the flotation tungsten concentrates is high, and the flotation tungsten concentrates and the tungsten concentrates subjected to rough concentration and selection through the interrupted centrifugal machine are combined into final tungsten concentrates. The recovery rate of tungsten flotation work reaches 85% or above, the gradeof tailing tungsten is lower than 0.06%, and the tailings and deslimed tailings of the continuous ore discharge centrifugal machine are combined to generate final tailings to be directly discarded.

Description

technical field [0001] The present invention relates to a new short-process mineral processing process that uses continuous ore discharge centrifuge desliming-intermittent centrifuge selection-flotation sweeping process to efficiently separate and recover low-grade tungsten fine mud, which can be applied to (micro) fine-grained colored Metal ore, rare metal ore beneficiation field. Background technique [0002] Tungsten fine slime refers to the general term for raw ore washing, desliming, spiral classifier overflow and gravity classifier overflow. According to statistics, about 20% of tungsten metal is lost in tungsten slime every year in my country, and the recovery rate of tungsten fine slime (calculated according to the selected raw ore) in domestic processing plants is generally only 20% to 55%. Usually, the yield of fine slime in the tailings of a tungsten concentrator is 10% to 15%, but the occupancy rate of tungsten metal is as high as 40% to 50%, which is equivalent...

AI Technical Summary

Problems solved by technology

The tungsten slime produced by tungsten ore beneficiation contains fine-grained tungsten ore, but the grade of tungsten is low, the particle size is fine, the specific surface area is large, the surface energy is high, and the particles are easy to form non-selective condensation and coverage, and there is no selectivity for chemicals. Strong adsorption capacity, so the flotation process consumes a lot of reagents

If a cyclone is used for desliming, the tungsten grade of the overflow product is high, and the recovery rate of the desliming operation is low, which directly affects the recovery rate of tungsten fine slime beneficiation; if a gravity separation process such as shaking table separation is used, it is difficult to recover such fine particles Tungsten ore, and the processing capacity is very small, the recovery rate of tungsten is low, the economic benefit is poor, and it is difficult to popularize and apply; if the flotation process is adopted, the fine mud will seriously interfere with the flotation process, the effect is not ideal, and the reagent consumption is large, and the tailings Water sedimentation is difficult and the organic matter in the water exceeds the standard

So far, there is still a lack of an effective beneficiation process that can efficiently separate low-grade tungsten fine sludge

Images