Production of iron ore pellets

Details Production of iron ore pellets Production of iron ore pellets

C - Chemistry, Metallurgy

22

B

C22B 1/242 (2006.01) C22B 1/24 (2006.01) C22B 1/243 (2006.01)

Patent

CA 2281003

A process for producing fired pellets by granulating finely-ground iron ore and subjecting the resulting granules sequentially to drying, dehydration, preheating, and firing, wherein said process comprises adding an additive to said finely-ground iron ore at the time of granulation, said additive reacting with iron ore to form a compound which has a melting point lower than the preheating temperature. Owing to the additive (or sintering auxiliary) added in a small amount to iron ore powder, it is possible to produce preheated pellets by using the existing grate kiln without increasing the amount of preheating energy. The resulting preheated pellets have improved strength and produce no adverse effect on finished pellets.

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