| 摘要 |
2128605 9315232 PCTABS00024 A method of reducing material containing metal oxide in a circulating fluidized bed, in which coal in excess and air is introduced into the fluidization chamber (12) so as to maintain a temperature of > 850 ·C in the chamber. Bed material which has been separated from the flue gases is conveyed through a carbidization chamber (48) in a recirculation system at a temperature of < 850 ·C to the lower part of the fluidization chamber. Conditions favourable for formation of carbide are maintained in the carbidization chamber.
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