Enrichment of Nickel and Cobalt by Solid-State Reduction of Limonite-Type Nickel Laterite Ore Enhanced by NaFeS2
The effects of the amount of NaFeS2,which was used as an additive,on solid-state reduction and magnetic separation for enrichment of nickel and cobalt,and also the reduction behavior of nickel laterite ore were studied.The results show that with the increase of NaFeS2 addition,the softening and melting temperature of nickel laterite ore decreases correspondingly during the reduction process;while particles of the Ni-Co-Fe alloy obtained by reduction increase accordingly.The enrichment and recovery effects of nickel and cobalt will be better by adding 10％NaFeS2.The nickel laterite ore,after being pressed into briquettes,was subjected to reduction at 1 100℃ for 60 min,followed by a process of grinding and magnetic separation,resulting in a high quality nickel-cobalt-iron powder grading 7.89％Ni,0.66％Co and 74.01％Fe,at corresponding recoveries of 97.13％,86.78％and 35.81％.
nickel laterite oreadditivereduction roastingNaFeS2Ni-Co-Fe powdersolid state reductionmagnetic separationNiCo
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