C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 5/14 (2006.01) C22B 1/00 (2006.01)
Patent
CA 2531697
A method for decreasing the elutriation loss of fine iron ore in a circulating fluidized bed type reducing operation is disclosed. The method includes charging lime stone (CaCO3) or dolomite (CaCO3, MgCO3) in an amount of 3-6 vol% together with the fine iron ore into a fluidized bed type furnace. In another embodiment, the method includes the addition of a sludge in an amount of 0.2-5.0 wt% to the fine iron ore and mixing them thus coating the fine iron ore particles; drying the coated particles at a temperature of 105-800°C for 1-24 hours and then charging the coated fine iron ore into a fluidized bed type furnace.
Choi Nag-Joon
Chung Uoo-Chang
Gennari Udo
Hauzenberger Franz
Jeong Sun-Kwang
Pohang Iron & Steel Co. Ltd.
Research Institute Of Industrial Science & Technology
Robic
Voest-Alpine Industrieanlagenbau Gmbh
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