Beneficiation method for copper-nickel sulfide ore containing layered silicate gangue easy to float

Abstract

The invention discloses a beneficiation method for copper-nickel sulfide ore containing layered silicate gangue easy to float. The beneficiation method comprises the following working procedures that the raw ore is ground and mixed into copper-nickel sulfide ore slurry; floating with gangue and copper-nickel dominated by copper is carried out on the copper-nickel sulfide ore slurry to obtain copper-nickel mixed rough concentrate and floating tailings; gangue inhibitors and xanthate class collectors are added to the copper-nickel mixed rough concentrate, and floating is carried out to obtain copper-nickel bulk concentrate; lime is added into the copper-nickel bulk concentrate, and floating is carried out to obtain copper concentrate and first nickel concentrate; copper sulfate, the xanthate class collectors and foaming agents are added into the floating tailings, and floating is carried out to obtain nickel concentrate. The method is easy to operate, high in controllability, and high in adaptability to the ore; as the layered silicate gangue easy to float can be effectively removed, and complex low-grade copper ore and nickel ore with embedded fine grains can be recycled, the floatation separation difficulty of the copper ore and the nickel ore is reduced, the quality of the copper concentrate and the nickel concentrate is remarkably improved, and the recovery rate is increased.

Description

technical field [0001] The invention relates to the technical field of beneficiation, in particular to a method for beneficiating copper-nickel sulfide ore containing layered easily floating silicate gangue. Background technique [0002] At present, the mineralogical properties of copper-nickel sulfide deposits found in various parts of the world are roughly similar. In the copper-nickel sulfide ores mined from these deposits, in addition to copper and nickel, there are also platinum, palladium, gold, silver, osmium, iridium, ruthenium, rhodium, cobalt and other metal elements and layers with similar composition and structure. Easy-to-float silicate gangue. [0003] In the prior art, there are at least the following technical difficulties in beneficiating these copper-nickel sulfide ores: [0004] First, in these copper-nickel sulfide ores, the content of layered easily floating silicate gangue is relatively high, and the layered easily floating silicate gangue is easy to ...

AI Technical Summary

Problems solved by technology

[0004] First, in these copper-nickel sulfide ores, the content of layered easily floating silicate gangue is relatively high, and the layered easily floating silicate gangue is easy to muddy and has good natural buoyancy, so this has caused a great impact on ore dressing. great negative impact

[0005] Second, among these copper-nickel sulfide ores, chalcopyrite has good buoyancy, while there are many types of nickel minerals with large differences in buoyancy; although some nickel sulfide minerals have good buoyancy, most nickel sulfide minerals are easy to float. crushed, easily oxidized

[0006] Third, in these copper-nickel sulfide ores, the embedded particle size of copper minerals and nickel minerals is uneven, and the content of fine grains is often high, which also adds great difficulty to the beneficiation of copper-nickel sulfide ores.

[0007] It is precisely because of these technical difficulties that the traditional beneficiation method of copper-nickel sulfide ore has an unsatisfactory recovery rate of copper concentrate and nickel concentrate, and the quality of the copper concentrate and nickel concentrate obtained by ore dressing is also very poor.

Images