Patent ID: 7588625
Filing Date: 2009-09-15
Classification: C21B,Y02P

Abstract:
1. A method for manufacturing molten irons, comprising: providing a mixture containing iron by drying and mixing iron ores and additives; passing the mixture containing iron through one or more successively-connected fluidized beds to convert the mixture into a reduced material that is reduced and calcined; forming a coal packed bed as a heat source in which the reduced material has been melted; charging the reduced material to the coal packed bed and supplying oxygen to the coal packed bed to manufacture molten irons; and supplying reducing gas exhausted from the coal packed bed to the fluidized bed, wherein the mixture is dried and conveyed using branched exhaust gas comprising less than all of the exhaust gas which is exhausted from the fluidized bed and supplied to a conveying line while the mixture is conveyed toward the fluidized bed in the conveying line; and the mixture is supplied to the conveying line in substantially the same direction as a supplying direction of the branched exhaust gas to the conveying line to start conveying the mixture in the conveying line.