Method for efficiently sorting scheelite containing weakly magnetic impurities

Abstract

The invention discloses a method for efficiently sorting scheelite containing weakly magnetic impurities. The method comprises the following steps of: crushing crude ore of scheelite, performing a process of stage grinding, high-frequency screening and high-gradient magnetic separation, fully dissociating minerals before a conventional flotation process, and removing the weakly magnetic impurities in advance, wherein the grade of wolframine in the scheelite during flotation is improved; and performing an original multi-stage flotation to obtain high-grade wolframine concentrate, so that high-quality powdered iron can be produced, and tailings are removed through magnetic separation and scavenging only in the selection process. The method has the advantages of obviously performing pre-concentration and in-advance tailing removal on the scheelite containing weakly magnetic impurities and effectively and stably stabilizing the quality of the flotation ore; and meanwhile, the method also has the advantages of reducing risk brought by fluctuation of the mineral quality, improving the mineral separation efficiency, improving the flotation operation efficiency, saving lots of agents and flotation management cost, improving the comprehensive utilization rate of wolframine resources and the like.

Description

technical field [0001] The invention relates to a method for sorting ores, in particular to a method for efficiently sorting scheelite containing weak magnetic impurities. Background technique [0002] At present, the traditional process of "multi-stage flotation" is generally adopted for the separation of scheelite, that is, after the raw ore of scheelite is crushed, ball milled, and simply classified, the qualified scheelite is obtained through the "multi-stage flotation" process. concentrate. The main disadvantages of this process flow are: (1) The process is too simple, and it is selected for the whole particle size, resulting in low flotation efficiency, and the grade of tungsten in the scheelite entering the flotation process is low; (2) The original process does not have Stage grinding and fine classification cannot guarantee the complete dissociation of the ore body, which affects the discharge of comprehensive tailings and reduces the utilization rate of resources;...

AI Technical Summary

Problems solved by technology

The main disadvantages of this process flow are: (1) The process is too simple, and it is selected for the whole particle size, resulting in low flotation efficiency, and the grade of tungsten in the scheelite entering the flotation process is low; (2) The original process does not have Stage grinding and fine classification cannot guarantee the complete dissociation of the ore body, which affects the discharge of comprehensive tailings and reduces the utilization rate of resources; (3) The traditional process completely relies on flotation and sorting operations, and the flotation process is lengthy and complicated, resulting in (4) The grade of scheelite ore entering flotation is greatly affected by mineral composition, and the final scheelite concentrate index is greatly affected by ore supply fluctuations, resulting in unstable production

This situation has resulted in the high cost and low efficiency of sorting scheelite resources containing weak magnetic impurities, and the comprehensive utilization rate is generally low.