Patent ID: 6416728
Filing Date: 2002-07-09
Classification: C21B,Y02P

Abstract:
A method for reducing free carbon generation by thermal decomposition of carbon monoxide or hydrocarbon when raw materials for iron making or steel making mainly comprising iron carbide as a main component is produced by reducing and carburizing iron-containing raw materials for iron making mainly comprising iron oxides and iron hydroxides as main components using a reaction gas mainly containing hydrogen and methane, comprising the steps of dividing an inside of a reactor into a plurality of compartments, detecting the presence of free carbon in the reactor by finding out a lower temperature due to an endothermic reaction by means of a thermometer installed in a latter half of the compartments which are closer to an outlet port for product, and changing a composition of the reaction gas corresponding to a quantity of detected free carbon indicated by said temperature to reduce free carbon generation in said reactor.