Beneficiation method for multi-metal associated fluorite ore by adopting quality-divided flotation-step-by-step inhibition

Abstract

The invention belongs to the technical field of beneficiation, and particularly relates to a beneficiation method for multi-metal associated fluorite ore by adopting quality-divided flotation and step-by-step inhibition, which comprises the following steps of: performing quality-divided flotation of fluorite: taking floating tungsten tailings as fluorite flotation feed ore, firstly performing fluorite roughing operation, flotation is carried out by adopting a small amount of agents or agents with good selectivity; the reagent system comprises sodium carbonate, water glass, a calcium inhibitor and a fluorite collecting agent; the method has the beneficial effects that quality and flow division is achieved at the front end of fluorite flotation, the quality of high-degree concentrate is guaranteed, meanwhile, flotation and treatment of fluorite difficult to float are enhanced, and the total recovery rate is greatly increased; and step-by-step inhibition is adopted, silicate minerals are firstly inhibited under the alkaline condition, and then calcium carbonate is inhibited under the acidic condition, so that the comprehensive grade of the fluorite concentrate is improved.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a mineral processing method using fractional flotation-step-by-step inhibition for polymetallic associated fluorite ore. Background technique [0002] A large-scale tungsten-molybdenum-bismuth-associated fluorite polymetallic mine in Hunan belongs to skarn-type ore body. The main beneficiation process is: magnetic separation deferrification-molybdenum, bismuth and sulfur full flotation-black and white tungsten mixed flotation-fluorite flotation. Grind the raw ore to a fineness of -200 mesh, accounting for about 70.0%, and then perform fluorite flotation on the tailings after successively undergoing magnetic separation deferrification, molybdenum, bismuth, sulfur full flotation and chelation collector mixed flotation black and white tungsten, Fluorite flotation feed concentration is about 40.0%, grade CaF220.00%, CaCO33.95%, SiO238.72%, fluorite flotation process see f...

AI Technical Summary

Problems solved by technology

[0004] 1. In the floating tungsten tailings of polymetallic mines, due to the effects of the remaining chemicals in the pulp, as well as the natural buoyancy of fluorite, particle size, embedded particle size, monomer dissociation degree and other factors, it can be buoyant There is a big difference in sex;

[0005] 2. In the currently used fluorite flotation process, the roughing operation section uses a high-alkalinity medium, a large dose of inhibitor, and a large amount of collector at the same time to strengthen the flotation of fluorite. This roughing agent system, It is indeed possible to guarantee the recovery rate of the fluorite roughing operation section; however, to float all the pumiceous gangue minerals such as fluorite and calcium carbonate, resulting in low grade of coarse concentrate and high yield, and a large amount of defoaming water is needed to flush The loose foam leads to an increase in the amount of pulp, and the flotation time of the first and second concentrates is prone to insufficient flotation time, which makes the flotation efficiency of the entire roughing operation section low, and the coarse concentrate CaF 2 low grade;

Images