Fluidized bed reduction of laterite fines with reducing gases generated in situ
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United States of America Patent
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Apr 30, 2002
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app pub date -
Sep 8, 2000
filing date -
Jan 12, 1999
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Abstract
The present invention is concerned with a method for the pre-reduction of laterite fines in a reactor, preferably a fluidized bed, with reducing gases generated in situ by adding a reducing agent such as a carbonaceous material in the fluidized bed chamber, fluidizing the bed with an oxidizing gas and maintaining the reactor at a temperature sufficiently high to partially combust the coal and generate a reducing atmosphere. The reactor bed discharge calcine product has a carbon content of about 0.1%, and the composite reactor product has a carbon content lower than 2.0%.
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