Copper-sulfur separation inhibitor, lime-free copper-sulfur flotation separation method and application thereof

Abstract

The invention provides a copper-sulfur separation inhibitor, a lime-free copper-sulfur flotation separation method and an application thereof, and relates to the technical field of mineral treatment. The copper-sulfur separation inhibitor comprises sodium carbonate, ammonium sulfate, calcium chloride and sodium hydroxide raw materials, the copper-sulfur separation inhibitor prepared from the raw materials according to a specific dosage ratio has the characteristics of strong inhibition capability, good selectivity and the like, and a good inhibition effect can be achieved by using a small dosage in the copper-sulfur beneficiation process; the copper-sulfur separation inhibitor can replace a traditional lime inhibitor, environment-friendly and efficient recovery of copper-sulfur resources is achieved under the lime-free condition, and the defects that due to the fact that lime is adopted as the inhibitor, foam becomes sticky, the grade of copper concentrate is not high, pipelines and equipment are calcified and corroded, the pH value of tailing water is high, and the environment is polluted are overcome. The invention further provides the lime-free copper-sulfur flotation separation method. In the flotation process of the copper-sulfur raw ore, the specific copper-sulfur separation inhibitor and a collecting agent are adopted, so that efficient separation of copper and sulfur is achieved.

Description

technical field [0001] The invention belongs to the technical field of mineral treatment, and in particular relates to a copper-sulfur separation inhibitor, a copper-sulfur flotation separation method under lime-free conditions and an application thereof. Background technique [0002] Copper is an important strategic resource of the country. Because of its good ductility, high thermal conductivity and electrical conductivity, it is widely used in electrical, light industry, machinery manufacturing, construction industry, national defense industry and other fields. The content of copper in the earth's crust is about 0.01%, and most of them exist as compounds, namely copper ore. Copper ores can be divided into three categories: (1) sulfide ores, such as chalcopyrite (CuFeS 2 ), Bornite (Cu 5 FeS 4 ) and chalcocite (Cu 2 S), etc.; (2) oxide ore, such as cuprite (Cu 2 O), malachite [Cu 2 (OH) 2 CO 3 ], azurite [2CuCO 3 ·Cu(OH) 2 ], Chrysocolla (CuSiO 3 2H 2 O), etc.;...

AI Technical Summary

Problems solved by technology

However, there are major disadvantages in the use of lime. First, lime needs to be prepared into lime milk before it can be used. The workload is large and there are potential safety hazards in strong alkalinity. Second, it is easy to scale during use, block pipes, and the amount of addition fluctuates greatly, which leads to industrial production. The index fluctuates greatly; the third is that after adding a large amount of lime, the flotation foam becomes sticky, the pipeline transportation is difficult, and the concentrate filtration is difficult; the fourth is that after the lime is used, the tailings have high alkalinity, and the pH is even greater than 10, which cannot be discharged outside, and the environmental protection pressure is huge; Fifth, the mining and burning of lime will cause serious environmental pollution and serious damage to water and soil. With the tightening of national environmental protection policies, the mining and burning of lime will face difficulties, and the method of adding a large amount of lime for copper-sulfur ore separation is unsustainable

Although it has also been reported that the copper-sulfur ore beneficiation method uses strong oxidants such as calcium hypochlorite and potassium permanganate instead of lime, but the medicament is prone to failure, the storage and operation safety hazards are large, and the production index fluctuates greatly, so it cannot be used in large-scale industries.

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