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Reduction of nickel from sulfides of the concentrate of the bessemer matte separation

Reduction of nickel from sulfides of the concentrate of the bessemer matte separation,10.3103/S1067821210010062,Russian Journal of Non-ferrous Metals,

Reduction of nickel from sulfides of the concentrate of the bessemer matte separation  
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The possibility of direct reduction of nickel from its sulfides (heazlewoodite, pentlandite, and disulfide) by intrinsic sulfide sulfur in a sodium hydroxide melt is confirmed experimentally. This process can be performed in a temperature range of 550–700°C reaching a 95–98% degree of metallization. The chemistry of utilization reactions of sulfur varies as a function of the duration of the phase contact (8–12 minutes). At the initial stage, sodium polysulfides are accumulated in alkali fusion cake and are decomposed in time, participating in the disproportionation reaction with the formation of monosulfide sulfur. The process of reduction of nickel from sulfides is limited by the intradiffusion kinetics.
Journal: Russian Journal of Non-ferrous Metals - RUSS J NON-FERROUS METALS , vol. 51, no. 1, pp. 32-38, 2010
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