Sorting method of low-grade black and white tungsten fine clay

Abstract

The invention discloses a sorting method of low-grade black and white tungsten fine clay. A buoyancy-gravity-buoyancy combined process is adopted, the complex fine clay mineral recycling and grade increasing requirement is satisfied, and the overall advantage of the process is given. The process has the advantages of simplicity, convenience in operation and management, strong suitability and no need of heating, the technical problem that the grade of the tungsten fine clay concentrate does not meet the smelting requirement all the time is solved, and the purpose of directly producing qualified-grade black and white tungsten fine clay concentrate by floatation at normal temperature is realized. Because the concentrate grade of the product meets the requirement for sale, the cost of flotation reagents and the loss of the amount of metal due to the decrease of the recovery rate are enough to offset by economic benefits obtained by the increase of the selling price, more importantly, the product marketing is expanded, so that the requirement of environmental protection of a smelting plant is met, and good social benefits are generated.

Description

technical field [0001] The invention belongs to the technical field of ore dressing, and in particular relates to a method for sorting low-grade black and white tungsten fine mud. Background technique [0002] The recovery of black and white tungsten slime is one of the recognized technical problems in mineral processing at present. In order to improve the final concentrate grade of black and white tungsten fine mud, the traditional heating and concentrating process of black and white tungsten was first adopted, that is, "tungsten normal temperature roughing - tungsten heating and concentrating - weak magnetic separation - strong magnetic separation - heavy Because the crude concentrate grade of tungsten flotation is lower than about 3%, the crude concentrate yield is high, and the heating and beneficiation energy waste is large. Difficult, the return water is difficult to use, coupled with the long process flow, many equipment, labor-intensive operation, difficult manageme...

AI Technical Summary

Problems solved by technology

[0005] It can be seen from the above that the recovery of black and white tungsten fine sludge adopts the rough separation of tungsten at room temperature-centrifuge selection production process, which solves the key technologies such as no need for heating and water glass, and simplifies the process flow, but the produced black and white tungsten The grade of mixed concentrate is low, generally only about 18%, which still does not meet the minimum requirement of 30% concentrate grade for tungsten products, and can only be sold with merchants at an agreed price lower than the market price, which affects the efficiency of the enterprise Further development, especially at present, the competition in the tungsten market is becoming more and more fierce, and the requirements for environmental protection tend to be more and more important, and tungsten smelting slag is listed as one of the hazardous waste products. High requirements will directly lead to a decline in the demand for low-grade tungsten concentrates, and the produced low-tungsten products will face a situation where it is difficult to sell. It can be seen that if the grade improvement of tungsten concentrates is not resolved early, it will eventually affect the overall profitability of the enterprise, and even Can't sell

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