| abstract |
In a method for the production of molten metal, oxygen, a reducing agent and iron reduced in a reduction reactor are introduced into a melt gasifier (3), the reducing agent is gasified with oxygen and reduced iron is melted by means of the heat which occurs, the cupola gas being used as at least a fraction of the reduction gas. Reacted top gas is drawn off from reduction reactor (1). For increased efficiency in terms of energy and raw materials, there is in this case provision for at least part of the heat energy of the top gas and/or of the fraction of the reduction gas, provided for use as cooling gas and as excess gas, to be utilized for the indirect heating of at least one further gas used in the method. For this purpose, at least on heat exchanger (15, 18, 21) in a line (9 and/or 23) for top gas and/or for the fraction of the reduction gas, provided for use as cooling gas and as excess gas, is provided, at least one further gas used in the method flowing through said heat exchanger (15, 18, 21). |