Apparatus for preparing binder-free hot-briquets
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United States of America Patent
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Feb 24, 1987
Issued Date -
N/A
app pub date -
May 16, 1985
filing date -
Jun 22, 1982
priority date (Note) -
Expired
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Abstract
The invention relates to a process and an apparatus for preparing binder-free hot-briquets for smelting purposes from ferrous pyrophorous, finely divided solids, such as dry steelmaking-filter dust or slightly granular sponge iron from direct-reduction plants. Before the briquetting stage, oxidizing gas is blown at a temperature of more than 200.degree. C. through the finely divided dry solid containing more than 4% by weight of metallic resin. The flow rate of this gas is controlled in such a way that oxidation of some of the metallic iron raises the temperature of the finely divided solid to 450.degree. C. to 650.degree. C. This is followed by hot-briquetting.
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