Apparatus and process for direct reduction of materials in a...

C - Chemistry – Metallurgy – 22 – B

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39/18, 53/8

C22B 1/216 (2006.01) C21B 13/08 (2006.01) C22B 5/02 (2006.01) F27B 7/00 (2006.01) F27B 19/00 (2006.01)

Patent

CA 2014189

NHL-BAI-02 Canada APPARATUS AND PROCESS FOR DIRECT REDUCTION OF MATERIALS IN A KILN ABSTRACT OF THE DISCLOSURE An apparatus for directly reducing pellets of material without melting the material includes the transporting of the pellets through drying and preheating zones on an oxidizing traveling grate and reduction in a ported rotary kiln. There is a kiln having a first end and a second end with the first end being substantially adjacent to the heating and oxidizing component for receipt of the pellets therefrom. The kiln is inclined downwardly and is rotated to advance the pellets through the kiln from the first end to the second end thereof. The kiln includes an induration zone for indur- ating the pellets. The induration zone is adjacent to the first end and remote from the second end and extends for a substantial portion of the kiln from the first end. The kiln includes a reduc- tion zone extending from the downstream end of the induration zone to the second end. A device is used to inject a reducing agent into the reduction zone of its kiln for making contact with the pellets advancing through the reduction zone. The kiln is heated to assist in a reduction of the pellets in the reduction zone. The pellets advancing through the induration zone are substantially free of contact with the reducing agent. The invention also in- cludes the process for directly reducing the pellets of material.

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