Hydrometallurgical processing of manganese containing materials
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United States of America Patent
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May 31, 2011
Grant Date -
May 19, 2005
app pub date -
Oct 1, 2003
filing date -
Oct 10, 2002
priority date (Note) -
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Abstract
A process for the hydrometallurgical processing of manganese containing materials, the process characterized by the combination of a manganese dioxide containing feedstock and an acidic solution to form an acidic solution to be leached, and passing a volume of sulphur dioxide gas through that leach solution as the leaching agent, whereby no sintering or roasting pre-treatment step of the feedstock is undertaken and the levels of dithionate ion generated in the leach solution are less than about 5 g/l. Also described is a process for the production of electrolytic manganese dioxide.
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