Method for recovering nickel hydrometallurgically from two different nickel mattes
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United States of America Patent
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Mar 21, 2000
Grant Date -
N/A
app pub date -
Feb 5, 1998
filing date -
Aug 14, 1995
priority date (Note) -
Expired
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Abstract
The invention relates to a method for recovering nickel in one and the same process from two pyrometallurgically produced nickel mattes, one of which contains a remarkable percentage or iron. The leaching of iron-bearing nickel matte is carried out in one step by conducting solution from the leaching cycle of a less iron containing matte into the leaching of a more iron containing matte at a stage where the iron of the less iron containing matte is in soluble form. The iron contained in the mattes is advantageously precipitated as jarosite and the solution created in the leaching of the more iron containing matte is conducted back into the leaching cycle of the less iron containing matte.
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