Process for the direct production of steel

Details Process for the direct production of steel Process for the direct production of steel

1975-10-14

1977-10-11

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 26, 423148, C21C 552, C22B 110

Patent

active

040533018

ABSTRACT:
A process for the direct production of steel from particulate iron oxides or concentrates including two major steps in which in Step (1) the iron oxides are converted to iron carbide and in Step (2) steel is produced directly from the carbide in the basic oxygen furnace or the electric furnace. In the production of the carbide the oxides are reduced and carburized in a single operation using a mixture of hydrogen as a reducing agent and carbon bearing substances such as propane primarily as carburizing agents. Iron carbide thus produced is introduced as all or part of the charge into a basic oxygen furnace to produce steel directly without the blast furnace step. In order to make the steel making process auto-thermal, heat is supplied either by using the hot iron carbide from Step (1) or preheating the iron carbide or by including sufficient fuel in the iron carbide to supply the required heat by combustion.

REFERENCES:
patent: 228329 (1880-01-01), Edison
patent: 2780537 (1957-02-01), Stelling
patent: 2894831 (1959-07-01), Old
patent: 3140168 (1964-07-01), Halley
patent: 3364009 (1968-01-01), Kemmetmuller

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