Leaching nickeliferous oxide ores
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United States of America Patent
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Mar 25, 1980
Issued Date -
N/A
app pub date -
Nov 6, 1978
filing date -
Aug 1, 1977
priority date (Note) -
Expired
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Abstract
In leaching a slurry of nickeliferous oxide ore containing less than about 35% iron with sulfuric acid under superatmospheric pressures at temperatures between about 230.degree. C. and about 300.degree. C. a water-soluble alkali metal or ammonium compound is added to the slurry after leaching is more than about 50% complete whereby the settling characteristics of the leached slurry during solids-liquids separation are improved.
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