Process for preparing binderfree hot briquettes for smelting pur

Details Process for preparing binderfree hot briquettes for smelting pur Process for preparing binderfree hot briquettes for smelting pur

1986-07-18

1989-08-01

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 25, C22B 702

Patent

active

048530310

ABSTRACT:
The present invention relates to a process and apparatus for preparing binder-free hot briquettes for smelting purposes consisting of iron-containing pyrophorous finely divided solids. Before briquetting, the finely divided solids are blown-through by means of a rising oxidating heated gas flow and held in a fluidized bed. During said process the gas flow is controlled in such a way that by oxidation of at least part of the metallic iron the temperature of the finely divided solids is increased to about 450.degree. to 650.degree. C. Subsequently, the solids are briquetted in hot condition. Characteristic for the invention is that there is added to the fluidized bed sensible heat from the outside until oxidation of part of the metallic iron starts, and that the fluidization bed is submitted to the effect of vibrations favoring the conveying of the solids over the fluidized bed.

REFERENCES:
patent: 4533384 (1985-08-01), Rellermeyer et al.

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