Roasting process in the direct reduction of iron...

Details Roasting process in the direct reduction of iron... Roasting process in the direct reduction of iron...

C - Chemistry, Metallurgy

22

B

53/10, 53/24

C22B 1/08 (2006.01) C21B 13/00 (2006.01) C21B 13/10 (2006.01) C22B 1/14 (2006.01) C22B 1/24 (2006.01)

Patent

CA 1047255

ABSTRACT OF THE DISCLOSURE A roasting process for the direct reduction of ores containing iron oxides which process comprises the following steps in sequence; 1. forming core pellets comprising finelyu ground ore; 2. coating the core pellets with a coke precursor so that the ratio of skin thichness of coke precursor to the diameter of the core pellets is in the range from 0.1:20 to 1:2. 3. heating the coated pellets in a substantially non- oxidizing atmosphere to a temperature below 1200°C. but high enough to cause the coke precursor to form a coke skin around the core pellet; wherein the coke precursor comprises from 5 to 25% w/w of a halide salt.

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