AN IMPROVED FLUIDIZED BED APPARATUS FOR MOLTEN IRON PRODUCTION AND METHOD USING THE SAME

摘要

The present invention relates to an apparatus and method for manufacturing molten iron. The method for manufacturing molten iron includes producing mixtures by drying and mixing iron ores and additives; passing the mixtures through one or more successively-connected fluidized beds so that the mixtures are reduced and calcined to be converted into the reduced materials; forming a coal packed bed, which is a heat source for melting the reduced materials; charging the reduced materials to the coal packed bed and supplying oxygen to the coal-packed bed to manufacture molten iron; and supplying reducing gas exhausted from the coal-packed bed to the fluidized bed, wherein in the conversion of the mixtures to reduced materials, oxygen is directly supplied to and combusted in an area where reducing gas flows to the fluidized bed. The apparatus for manufacturing molten iron of the present invention uses this method for manufacturing molten iron. Through use of the present invention, the reducing gas passing through the fluidized beds may be improved, and cohesion of the iron-containing fine ores may be prevented.