Patent ID: 7662210

Claim:
The method for manufacturing molten irons, comprising steps of: reducing mixtures containing iron ores in a reduction reactor and converting the mixtures containing iron ores into reduced materials; preparing lumped carbonaceous materials containing volatile matters as a heating source for melting the reduced materials; charging the lumped carbonaceous materials into a dome-shaped upper portion of a melter-gasifier and forming a coal packed bed; preparing fine carbonaceous materials containing volatile matters as a heating source for melting the reduced materials; injecting oxygen and the fine carbonaceous materials into the coal packed bed through a tuyere installed in the melter-gasifier; charging the reduced materials into the melter-gasifier connected to the reduction reactor and manufacturing molten irons; and supplying reducing gas in the melter-gasifier made from volatile matters contained both in the lumped carbonaceous materials and the fine carbonaceous materials to the reduction reactor.