Process and apparatus for preparing binderfree hot...

Details Process and apparatus for preparing binderfree hot... Process and apparatus for preparing binderfree hot...

C - Chemistry, Metallurgy

22

B

53/3, 39/46

C22B 1/24 (2006.01) C22B 1/10 (2006.01)

Patent

CA 1292621

ABSTRACT OF THE DISCLOSURE The present invention relates to a process and apparatus for preparing binder-free hot briquettes for smelting purposes consisting of iron-containing pyrophoric finely divided solids. Before briquetting, the finely divided solids are blown-through by means of a rising oxidising heated gas flow and held in a fluidized bed. During this process the gas flow is controlled in such a way that the temperature of the finely divided solids is increased to about 450 to 650°C by oxidation of at least part of the metallic iron. Subsequently, the solids are briquetted in a hot condition. Sensible heat is added to the fluidized bed from the outside until oxidation of part of the metallic iron starts, and the fluidized bed is submitted to the effect of vibrations favouring the conveying of the solids over the fluidized bed, and avoiding the formation of channels within the bed.

515835

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