Corrosion pretreatment flotation method for low-grade refractory ilmenite

Abstract

The invention provides a low-grade refractory ilmenite corrosion pretreatment flotation method which comprises the following steps: (1) adding water into ilmenite low-intensity magnetic separation iron tailings for ore grinding to obtain an ore grinding product; carrying out low-intensity magnetic separation on the ore grinding product, and carrying out high-intensity magnetic separation on low-intensity magnetic separation tailings to obtain high-intensity magnetic rough concentrate; water is added into the strong magnetic rough concentrate for ore grinding, and reground strong magnetic rough concentrate is obtained; water is added into the reground strong magnetic rough concentrate for size mixing, stirring is conducted, and ore pulp I is obtained; (2) settling the ore pulp I, removing upper-layer ore pulp water, adding water to mix the pulp, adding acid, and stirring to obtain ore pulp II; (3) settling the ore pulp II, removing upper-layer ore pulp water, adding water to mix the pulp, adding acid, and stirring to obtain ore pulp III; and (4) settling the ore pulp III, removing upper-layer ore pulp water, adding water to mix the slurry, and carrying out ilmenite flotation on the obtained slurry to obtain ilmenite concentrate. According to the method, the ilmenite separation efficiency is remarkably improved, the ilmenite concentrate grade and recovery rate are remarkably improved, and the using amount of the collecting agent can be remarkably reduced.

Description

technical field [0001] The invention belongs to the technical field of beneficiation, in particular to a flotation method for dissolution pretreatment of low-grade refractory ilmenite. Background technique [0002] Titanium is a typical strategic key metal and an indispensable and important raw material in modern industry and cutting-edge technology. It is widely used in steel, aerospace, marine, ultrasonic, vehicle engineering, biomedical engineering and other fields. Among them, titanium is used in the fields of military industry and aerospace. The new materials are particularly eye-catching. As the main mineral phase of titanium metal, ilmenite has increasingly prominent characteristics of “lean, fine and impurity”. The efficiency of magnetic, heavy and electric beneficiation process methods is limited by the influence of particle size, and it is difficult to separate fine-grained complex refractory ilmenite. The sorting effect of the ore is extremely limited, and flotat...

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Problems solved by technology

At the same time, the fragmentation surfaces of gangue minerals such as pyroxene, amphibole, serpentine, chlorite, and dolomite all contain certain metal ions, and these metal ions will become ilmenite flotation to collect The more active sites, the greater the amount of adsorbed collectors, which not only consumes a large amount of collectors, but also greatly reduces the selection of collectors, and the separation effect becomes worse. Difference

On the other hand, the dissociation of ilmenite monomer is difficult, and the gangue is embedded on the surface of ilmenite with a wide and thin surface layer, forming a rich conjoined body. When a large amount of ilmenite monomer is dissociated during the actual grinding process, the Grinding phenomenon is serious

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