Patent ID: 6488738
Filing Date: 2002-12-03
Classification: C21B,Y02P

Abstract:
A method of producing iron based molten metal from at least partially fine-particulate metal carriers in a melter gasifier, comprising:supplying the melter gasifier with a carbon-containing material and a gas composed at least of oxygen; simultaneously forming a reducing gas in a bed formed of solid carbon carriers in the melter gasifier; maintaining by a combustion process a high-temperature combustion zone spatially isolated from the freeboard of the melter gasifier, separate from and above the bed and extending into the bed; charging the metal carriers to the combustion zone; melting the metal carriers in the combustion zone; passing offgases formed in the combustion zone though at least a portion of the bed cooling the offgases by passing them through the portion of the bed; and withdrawing from the melter gasifier the offgases that have passed through the portion of the bed from the combustion zone and also withdrawing from the melter gasifier the reducing gas formed within the bed of the melter gasifier.