METHOD FOR INCREASING TEMPERATURE OF MOLTEN STEEL USING COMBUSTION HEAT OF HYDROGEN GAS

摘要

PURPOSE: A method for increasing a temperature of molten steel is provided which is not only economical but also harmless to the molten steel using combustion heat of a hydrogen gas so as to improve an existing method for increasing a temperature of the molten steel by aluminum. CONSTITUTION: In a method for increasing a temperature of molten steel to a target temperature after decarburizing and deoxidizing the molten steel as refluxing molten steel in a ladle to a vacuum tank of a vacuum degassing equipment, the method comprises the process of increasing a temperature of molten steel with a combustion heat of hydrogen gas by simultaneously blowing the hydrogen gas and oxygen gas into the upper part of the molten steel in the vacuum tank, wherein the hydrogen gas and oxygen gas are blown at pressures of 0.2 to 0.3 kg/cm3 and 2 to 3 kg/cm3 for 10 kg of molten steel respectively.