Method for producing a mixture of iron carbide and granular, directly reduced iron
AssigneeMetallgesellschaft Aktiengesellschaft
InventorsMartin Hirsch, Alpaydin Saatci
Life of this patent
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Abstract
An end product containing iron carbide (Fe3C) is produced from an intermediate product consisting of granular, directly reduced iron. Said intermediate product is supplied by an iron ore reduction plant and is fed to a carburization reactor. Liquid hydrocarbons are conveyed to the carburization reactor at temperatures of 500 to 900° C., at least part of the granular, directly reduced iron being subjected to a swirling movement. The end product removed from the carburization reactor consists of 5 to 90 wt. % Fe3C. A fluidization gas containing methane and hydrogen can be added to the carburization reactor in addition to the hydrocarbons.
Claims6
A process for producing iron carbide from granular, directly reduced iron obtained from the reduction of iron ore, which comprises supplying granular, directly reduced iron ore to a carburizing reactor and forming a fluidized bed of at least a part thereof in said carburizing reactor, supplying a liquid hydrocarbon to said reactor at a temperature of from 500° C. to 900° C. vaporizing said liquid hydrocarbon in said carburizing reactor and reacting the vaporized hydrocarbon with the fluidized directly reduced iron at a temperature of 580° C. to 700° C. to form a product comprising from 5 to 90% wt. iron carbide, and withdrawing at least a part of said product from said carburizing reactor.
Dependencies are inferred from the claim text.