| 摘要 |
In a method for producing high-purity nickel from impure nickel matte containing cobalt and other impurities including communiting and roasting the impure matte; dissolving the resulting impure nickel oxide in concentrated hydrochloric acid; oxidizing the iron in the resulting solution to the ferric state, removing the impurities from the solution by means of ion-exchange resin to produce a purified nickel chloride solution and selectively eluting the impurities to recover a cobalt chloride solution; and subjecting the purified nickel chloride solution to an electrolysis to recover high-purity nickel, the improvement in which the ion-exchange resin containing the impurities is eluted by means of approximately decinormal hydrochloric acid, the eluate is concentrated and then placed in contact consecutively with a first organic solvent to extract iron and a second organic solvent to extract cobalt, the first organic solvent is washed, decanted and then subjected to iron re-extraction, and the second organic extraction is washed, decanted and then subjected to cobalt re-extraction. |
