Benefication method for concentrating fine tungsten ore in tailings by warming scheelite

Abstract

The invention discloses a benefication method for concentrating fine tungsten ore in tailings by warming scheelite, which is characterized by comprising the following steps in turn: performing desliming and reagent removal; condensing concentrate after desliming and reagent removal, which is added with water, into 26 to 44 percent of pulp density, and controlling the pH of pulp at about 8.5; performing floatation on the fine tungsten ore; adding regulators of sodium fluosilicate, soluble glass, aluminium sulphate and lead nitrate; and adding collecting agents of benzohydroxamic acid and sulfated oleate soap, and performing rough concentration, concentration and scavenging to obtain the fine tungsten ore concentration and fine tungsten tailings. The method has simple recovery process flow, stable benefication process, high tungsten recovery rate, and low cost of reagents; the used benefication reagents do not pollute environment; and tailing water can meet the emission requirement. The method is suitable for the fine tungsten ore, of which the WO3 content is 0.95 to 5.10 percent, the ratio of peanut ore to the scheelite is between 1:9 to 9:1, and the occupancy rate of WO3 metal smaller than 30 microns is more than or equal to 60 percent, and which is subjected to concentration of the tailings by warming the scheelite and then reconcentration of the tailings by a shaker.

Description

technical field [0001] The invention relates to a beneficiation method for recovering fine-grained tungsten ore from scheelite heating and concentrating tailings. Background technique [0002] my country is rich in tungsten resources, ranking first in the world in both reserves and output. In the symbiotic ore of scheelite and wolframite, the ratio of scheelite to wolframite is 1:9~9:1. At present, the beneficiation method of black and white tungsten symbiotic ore is mixed flotation to obtain black and white tungsten mixed concentrate, and scheelite heated and concentrated to obtain scheelite concentrate and scheelite heated and selected tailings, and scheelite heated and selected tailings The ore is re-selected by shaking table to obtain coarse-grained black tungsten concentrate and fine-grained tungsten ore in scheelite heating flotation tailings, and fine-grained tungsten ore in scheelite heating flotation tailings is fine-grained Fine-grained tungsten concentrates and ...

AI Technical Summary

Problems solved by technology

[0005] The dehydration concentration-flotation method is to dehydrate and concentrate the ore pulp to a concentration of 26-44%, and then enter the flotation, and directly float the fine-grained tungsten ore. Under the condition of 90 ℃, a large amount of water glass was added, resulting in a large change in the buoyancy of the mineral surface, and the pH value of the slurry was greater than 13. The pH value of the ore is greater than 11, and the pH value is still high, which is not conducive to the flotation of black and white tungsten minerals (the optimal pulp pH for flotation of black and white tungsten ore is 5 to 9), and there are about 18% of -10 micron particle size The amount of ore exists in the slurry of black and white tungsten ore flotation, and the separation effect of this particle size is very poor during the flotation process (basically no separation), and the existence of minerals with a particle size of -10 microns seriously interferes with other particle sizes Mineral flotation sorting effect

[0006] Dehydration concentration-acid addition-flotation method is to add acid to neutralize the dehydrated and concentrated pulp with a pH of about 11, so that the pH of the pulp is about 8.5, and then enter the flotation operation, but there are still about 18%- The amount of ore with a particle size of 10 microns exists in the pulp of the black and white tungsten ore flotation. Severely interfere with the flotation and sorting effect of other particle size minerals

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