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AssigneeVale Inco Limited
InventorsMarc Murray Rishea, Indje Ognianov Mihaylov, Mohamed Buarzaiga, Flavia Dutra Mendes
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A process for producing a purified nickel hydroxide precipitate from a nickel-containing leach solution with impurities including one or more of the following: manganese, copper, zinc, iron and/or cobalt, so that the purified nickel hydroxide is suitable for pelletization with iron-containing ores and/or stainless steel production, includes treating the leach solution with a base to form a slurry of mixed hydroxide precipitate and low-nickel barren solution, thickening the slurry to form filter cake, washing the filter cake and contacting it with acid to dissolve nickel and other metals to produce a concentrated nickel-containing solution, subjecting the concentrated nickel-containing solution to solvent extraction with an organic acid extractant to remove metals other than nickel from the nickel-containing solution and form a solvent extraction raffinate of purified nickel solution and treating the solvent extraction raffinate with a base to precipitate the purified nickel hydroxide precipitate.
A process for producing a purified nickel hydroxide precipitate from a nickel-containing leach solution, the nickel-containing leach solution having impurities including at least one of manganese, copper, zinc, iron and cobalt, so that the nickel hydroxide precipitate is suitable for at least one of pelletization with iron-containing ores and stainless steel production, the process comprising:
A process for producing a purified nickel hydroxide precipitate from a nickel-containing leach solution having at least one of manganese, copper, zinc, iron and cobalt, as impurity, the process comprising:
Dependencies are inferred from the claim text.