Method for preheating feed materials for the production of iron

Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal

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423439, C22B 102, C01B 3130

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active

058109064

ABSTRACT:
The present invention provides a two-stage method for pretreating an iron oxide-containing feed material prior to conversion of the material into an iron carbide-containing product. The feed material is heated in the first stage in an oxidizing atmosphere to volatilize and/or thermally stabilize sulfide sulfur and evaporate moisture and heated in a reducing atmosphere in the second stage to reduce ferric iron to ferrous iron. The reduced material is then introduced into a system in which the iron oxides are substantially converted to iron carbide.

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No. 40 of 1995, Jun. 26, 1995, Trinidad and Tobago.
No. 48 of 1994, Jun. 17, 1994, Trinidad and Tobago.
Oehlberg, "FIOR Process for Direct Reduction of Iron Ore", Iron and Steel Engineer, vol. 54, No. 4, Apr. 1974, pp. 58-60.

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