Beneficiation method for efficiently separating copper, nickel and cobalt from cobalt-rich low-nickel sulfur

The invention discloses a beneficiation method for efficiently separating copper, nickel and cobalt from cobalt-rich low-nickel sulfur. The beneficiation method comprises the following steps: milling95-97% of cobalt-rich low-nickel sulfur to the granularity of -53 [mu]m by a rod mill, adding alkaline water in an ore milling process to control the pH value to be 12.5-12.6, and controlling the oremilling concentration to be 66-70%; adding 0.110-0.120 kg of a collecting agent S11016 into each ton of the milled cobalt-rich low-nickel sulfur; and performing flotation by a primary roughing, five-times refining and secondary scavenging beneficiation process to obtain a copper concentrate and a nickel and cobalt concentrate. The obtained copper concentrate contains more than 58% of copper and less than 5% of nickel. The nickel and cobalt concentrate contains less than 8% of copper, more than 95% of cobalt recovery rate and less than 13% of copper and nickel. The copper concentrate can entera copper smelting process.