Verfahren zum Erzeugen von Eisencarbid aus körnigem Eisenschwamm

摘要

Iron carbide (Fe3C) is produced from granulated sponge iron which has a maximum carbon content of 2 wt. % and is supplied from an iron ore reducing plant. The sponge iron is swirled with a gas containing carbon and a maximum 1.5 vol. % water in a fluidized bed reactor at temperatures ranging from 500 to 800 DEG C. A product is extracted from the reactor. The total iron content of said product is fixed at a minimum of 80 wt. % Fe3C. Preferably, methane or a gas containing methane is fed into the fluidized bed reactor as a gas containing carbon. A waste gas can be extracted from the top area of the fluidized bed reactor and hydrogen can be separated therefrom and at least partially directed into the reducing plant.