Method of flotation and magnesium reduction for talcum-type copper-nickel sulfide ore

Abstract

The invention relates to a method of flotation and magnesium reduction for talcum-type copper-nickel sulfide ore. According to the beneficiation method, talcum-type copper nickel polymetallic ore is taken as a raw material, a flotation technology is adopted, and nickel ore concentrate is obtained. The method comprises the steps of ore grinding, size mixing, roughing, scavenging and concentration operation. After ore grinding, sodium hexametaphosphate, butyl xanthate, ammonium dibutyl dithiophosphate, acidified water glass, sodium carboxymethylcellulose and 2#oil are added in sequence, the added sodium carboxymethylcellulose inhibits talcum which easily floats, and the acidified water glass enhances the selectivity of the inhibiting agent. The acidified water glass can form colloidal particles in the ore pulp system, the colloidal particles are selectively adsorbed on the surfaces of gangue mineral particles to make the gangue mineral particles hydrophilic and enhances the selectivity of the inhibiting agent sodium carboxymethylcellulose, and on the basis of not influencing the grade and recovery rate of copper and nickel concentrate, the content of MgO in the copper and nickel concentrate can be significantly reduced by 3% or above. According to the method, the content of MgO in the copper and nickel concentrate can be effectively reduced, and indicators in beneficiation for the talcum-type copper-nickel sulfide ore are improved.

Description

Technical field [0001] The invention belongs to the technical field of metallurgy, relates to copper-nickel ore dressing, and particularly relates to a method for reducing magnesium by flotation of talc-type copper-nickel sulfide ore. Background technique [0002] Nickel metal has been widely used in military industry, machinery, aerospace, civil stainless steel, medical machinery and other fields because of its good magnetism, corrosion resistance, ductility, and plasticity. At present, the development and utilization of nickel resources is still dominated by copper sulfide nickel ore, and 2 / 3 of the global nickel production still comes from sulfide ore, which is an important source of nickel. With the continuous mining of nickel ore, the grade of the original ore decreases year by year, the proportion of difficult-to-select complex copper sulfide nickel ore increases, the nature of the ore is complex, the content of altered magnesium silicate gangue increases, the content of ta...

AI Technical Summary

Problems solved by technology

With the continuous mining of nickel ore, the grade of raw ore decreases year by year, the proportion of refractory complex copper-nickel sulfide ore increases, the ore properties are complex, the content of altered magnesium silicate gangue increases, the content of target minerals becomes lower, and it is easy to be oxidized. Problems such as serious over-crushing of gangue minerals are prominent, and it is even more difficult to guarantee the concentrate index

[0003] Magnesium-containing silicate such as talc is the main gangue mineral of copper-nickel sulfide ore. It has low hardness, is easy to muddy, and has good natural buoyancy. In addition, a small amount of copper and nickel minerals are inlaid and impregnated, and are collected by mercapto In the process of copper-nickel beneficiation, the nickel-copper main metal inevitably enters the concentrate, resulting in high content of impurities such as magnesium oxide in the nickel concentrate produced by flotation, which affects the subsequent smelting.

Images