PROCESS FOR MAKING HIGH PURIFIED NICKEL SULFATE FROM NICKEL CONCENTRATES, NICKEL MATTE

摘要

PURPOSE: A manufacturing method of high purity nickel sulfate from nickel concentrate and nickel matte is provided to increase efficiency and profitability of the leaching process. CONSTITUTION: A manufacturing method of high purity nickel sulfate from nickel concentrate and nickel matte comprises the following steps: manufacturing raw slurry by pulverizing and distributing the nickel concentrate or nickel matte(a); primarily leaching nickel source from the raw slurry by using high pressure heating reaction; obtaining nickel sulfate leachate from the nickel source by heat pressuring thereof and collecting insoluble noble metal(c); obtaining nickel sulfate leachate by removing Fe component after adding the nickel sulfate aqueous solution into a heat pressuring reaction bath; adding the nickel sulfate aqueous solution into a multi-stage mixed settler and obtaining nickel sulfate purified liquid through the solvent extraction, solvent scrubbing, and solvent stripping(d); and manufacturing nickel sulfate crystal seed from the nickel sulfate purified liquid and obtaining high purity nickel sulfate by repeating heating and cooling(g). [Reference numerals] (a) Manufacturing raw slurry by pulverizing and distributing the nickel concentrate or nickel matte; (b) Primarily leaching nickel source from the raw slurry by using high pressure heating reaction; (c) Obtaining nickel sulfate leachate from the nickel source by heat pressuring thereof and collecting insoluble noble metal; (d) Obtaining nickel sulfate leachate from the nickel source; (e) Obtaining cobalt sulfate collecting solution; (f) Recycling through transient organic solvent purification; (g) Obtaining high purity hexavalent nickel sulfate by repeating heating