A method for recovery of zinc sulfide ore by depressurization activation flotation in copper-lead flotation tailings

Abstract

The invention discloses a method for depressurizing and activating flotation recovery of zinc sulfide ore in copper-lead flotation tailings, belonging to the technical field of mineral processing. In the present invention, lime is used to adjust the pH value of copper-lead flotation tailings slurry, a combined inhibitor is added to suppress gangue minerals in the slurry, an activator copper ammonia complex is added to depress and activate the zinc sulfide minerals in the slurry, and the combined Collector and frother flotation recovery of zinc sulfide minerals in pulp. The present invention uses cuproammonia complexes to depress and activate the suppressed zinc sulfide minerals, which can not only destroy the hydrophilic layer on the surface of the zinc sulfide minerals, but also activate the zinc sulfide minerals to form a copper-rich surface and enhance the collector’s The adsorption capacity strengthens the hydrophobic and floating of zinc sulfide minerals; at the same time, the present invention also adopts combined inhibitors to synergistically inhibit gangue minerals, and uses combined collectors to synergistically hydrophobic the activated zinc sulfide minerals, which solves the problem of copper-lead flotation tailings The technical problem that medium sulfide zinc ore is difficult to recover.

Description

technical field [0001] The invention relates to a method for depressurizing and activating flotation recovery of zinc sulfide ore in copper-lead flotation tailings, belonging to the technical field of mineral processing. Background technique [0002] Zinc is an important non-ferrous metal, and its status in national economic construction is becoming increasingly important. The reason why zinc can be so widely developed and applied in industrial production is due to its inherent physical and chemical properties. Therefore, zinc is widely used in iron and steel, metallurgy, machinery, electrical, chemical industry, light industry, military and medicine and other fields . From a global perspective, zinc smelting has always used zinc sulfide minerals as raw materials, and the vast majority of industrial zinc production comes from zinc sulfide minerals, and sphalerite is the most common zinc sulfide mineral. [0003] In nature, there is almost no single zinc sulfide deposit, an...

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Problems solved by technology

[0004] In the prior art, the method for recovering sphalerite from the tailings of lead-sulfur mixed concentrate is to use lime to suppress pyrite, use copper sulfate to activate sphalerite, and add aniline as a collector to recover lead-sulfur mixed concentrate by flotation. Sphalerite in ore separation tailings; ore dressing method for recovering zinc from floating lead tailings, using copper sulfate as activator, butyl xanthate as collector, and methyl isobutyl carbinol as foaming agent Zinc minerals in lead tailings are recovered by flotation; however, both of these two methods require regrinding of zinc coarse concentrate, which consumes a lot of energy, and the cost of beneficiation is high, and a considerable part of zinc minerals is still lost in the tailings. It is because the flotation recovery of zinc sulfide minerals in polymetallic sulfide ores not only involves the activation of zinc sulfide minerals, but also needs to eliminate the impact of its pre-inhibitory effect on subsequent flotation

[0005] Therefore, the use of the traditional activator copper sulfate can only have a good activation effect on uninhibited or weakly inhibited zinc sulfide minerals, but cannot have dual effects of de-inhibition and activation on completely inhibited zinc sulfide minerals, resulting in copper A large amount of zinc sulfide resource waste in lead flotation tailings

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