Beneficiation method for high-grade copper-nickel sulphide ore

Abstract

The invention relates to a beneficiation method for high-grade copper-nickel sulphide ore, and belongs to the field of beneficiation methods for copper-nickel sulphide ore. The beneficiation method includes the steps of 1), crushing and screening of raw ore, 2), magnetic separation and preconcentration of the raw ore, 3), grinding separation of low-grade ore, 4), reselection of tailings and 5), flotation of concentrates, concentration and filtration. During floatation, a beneficiation reagent in a specified ratio is added step by step, and high-grade copper-nickel ore of 2.5-5% is processed based on the technological process of low-grade copper-nickel ore of 0.5-1.5%. On the condition of 3.88% nickel grade and 0.56% copper grade of the raw ore, copper-nickel bulk concentrates with comprehensive nickel grade of more than 6% and comprehensive nickel metal recovery rate of 95% are acquired. The method is reliable and advanced in technology, low in investment, high in benefit and high in comprehensive recovery rate of valuable metal, and is an ideal beneficiation method for processing high-grade copper sulphide ore, nickel sulphide ore and copper-nickel sulphide associated ore by the original technological process.

Description

technical field [0001] The invention belongs to the field of beneficiation method of copper-nickel sulfide ore, and in particular relates to a method suitable for beneficiation of higher-grade copper sulfide ore, nickel sulfide ore, copper sulfide and nickel associated ore by adopting a low-grade process flow method. Background technique [0002] At present, the processing capacity of the non-ferrous metal concentrator in the existing technology depends on the scale of the concentrator determined in the beneficiation design stage. Since the grinding process determined at the design stage matches the properties of the ore in this area, and has a relatively fixed processing capacity and flotation time, it is not suitable for ores that exceed a certain range of raw ore grades in this area, especially high-grade copper-nickel ores. It is suitable for sorting in the process flow of the original dressing plant. Hard sorting will not only cause index deterioration due to insuffic...

AI Technical Summary

Problems solved by technology

With the depletion of mine resources, there are more and more concentrators that mainly rely on the processing of purchased ore. Due to the influence of the unfixed reserve of purchased ore and the unstable nature of the ore, the purchase of raw ore grades that are too high (low) Copper sulfide ore, nickel sulfide ore and copper sulfide and nickel associated ore undergo the above-mentioned ore dressing treatment method, which not only requires a large one-time investment, but also has a complicated process

In addition, since copper-nickel sulfide ores are mostly pyrrhotite, pentlandite, pentlandite and nickel-containing pyrrhotite, they are brittle, easy to muddy, easy to oxidize iron-rich sulfide minerals, so Often results in low copper nickel metal recovery

At present, there is no relevant literature record on the use of low-grade copper-nickel ore process to select high-grade copper-nickel ore

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