Method of controlling the thermal balance of the reaction shaft of a suspension smelting furnace and a concentrate burner

Abstract

The invention relates to a method of controlling the thermal balance of the reaction shaft of a suspension smelting furnace and to a concentrate burner for feeding reaction gas and pulverous solid mater into the reaction shaft of the suspension smelting furnace. In the method, endothermic material () is fed by the concentrate burner () to constitute part of the mixture formed from the powdery solid matter () and reaction gas (), so that a mixture containing the powdery solid matter (), reaction gas () and endothermic material () is formed in the reaction shaft (). The concentrate burner () comprises cooling agent feeding equipment () for adding the endothermic material () to constitute part of the mixture, which is formed from the pulverous solid matter () that discharges from the orifice () of the feeder pipe and the reaction gas () that discharges through the annular discharge orifice ().