Ore-dressing method for recovering nickel from ore-washing slurry of copper-nickel sulfide ore

Abstract

The invention provides an ore-dressing method for recovering nickel from ore-washing slurry of copper-nickel sulfide ore. The method comprises the following steps: performing a gravity concentration process on the ore-washing slurry; storing and dewatering the ore sand of the gravity concentrate; performing an open-circuit grinding process; performing a main program check screening process; performing a closed-circuit grinding process on unqualified grains; adding drugs in qualified grains and then performing a flotation process, wherein after performing the processes of coarse selecting, scavenging and finely selecting, the nickel concentrate grade is 6%-8%, the copper grade is 1%-1.6%, the grade of nickel in tailings is less than or equal to 0.2%, and the grade of copper in tailings is less than or equal to 0.04%; and then concentrating and dewatering the gravity concentrate tailings by using a concentrating machine; performing a slurry flotation process; adding a dispersing agent after adjusting the slurry with high concentration; and adding an ore-dressing reagent in stage adding manner, wherein the nickel concentrate grade is 4%-7% and the copper grade is 0.8%-1.5%. The ore-dressing method has the advantages of low cost, high production efficiency and high comprehensive recovery rate of valuable metal. The ore-dressing method is an ideal ore-dressing method for recoveringnickel from ore-washing slurry of copper-nickel ore.

Description

technical field [0001] The invention relates to a beneficiation method for recovering metal from non-ferrous metal washing pulp, which is suitable for extracting metal from copper sulfide ore, nickel sulfide ore and copper sulfide and nickel associated ore washing pulp. Background technique [0002] At present, the known method to reduce the impact of ore slime on non-ferrous metal ore beneficiation is to wash the ore. The ore pulp discharged from ore washing is rich in a large amount of metal resources. In copper-nickel sulfide ore, in addition to nickel and copper, it is also accompanied by cobalt, platinum, palladium, gold, silver and other rare elements. The metal recovery of non-ferrous metal ore washing pulp usually uses a thickener to concentrate the pulp to store ore and increase the concentration. The underflow of the thickener is transported to a hydrocyclone or a spiral classifier for inspection and classification. Mechanical closed circuit grinding, add dispersa...

AI Technical Summary

Problems solved by technology

With the above-mentioned beneficiation process, the metal recovery rate is low, the concentrate grade is not high, and the ore outlet of the concentration equipment such as the thickener is easily blocked, resulting in unstable process operation

Because copper-nickel sulfide ores are mostly pyrrhotite, pentlandite, pentlandite and nickel-containing pyrrhotite, and are brittle, easy to muddy, and easy to oxidize iron-rich sulfide minerals, resulting in such ores The mud content in the ore washing pulp is large, the particle size is uneven, the pulp concentration is low, and the amount of pulp is unstable

At present, there is no relevant literature record on the recovery of nickel metal from copper-nickel sulfide ore washing slurry

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