Method of recovering iron-bearing by-product flue dust

Details Method of recovering iron-bearing by-product flue dust Method of recovering iron-bearing by-product flue dust

1977-09-28

1978-10-10

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 3, 75 30, 75257, C22B 702

Patent

active

041194551

ABSTRACT:
A method of recovering iron-bearing flue dust collected as a by-product in wet sludge or dry form from metallurgical processes for recycling. The moisture content of the collected flue dust is adjusted to a level at which the wet dust is of a plastic consistency such that it will extrude into cohesive agglomerates (generally 8 - 16% moisture content). If the dust is collected in a dry state, moisture is added; if collected in a wet state, the moisture content is adjusted by the addition of a complimentary dry material. Hydraulic cement is added to the mixture in the range of approximately 4 - 15% by weight and the mixture is extruded into cohesive agglomerates and thereafter cured for subsequent charging to metallurgical furnaces.

REFERENCES:
patent: 1038370 (1912-09-01), Hubner
patent: 1158364 (1915-10-01), Bibb
patent: 1741544 (1929-12-01), Slagle et al.
patent: 2799571 (1957-07-01), Justice et al.
patent: 3316081 (1967-04-01), Bratton
patent: 3374085 (1968-03-01), Stone
patent: 3567811 (1971-03-01), Humphrey
patent: 3770416 (1973-11-01), Goksel
patent: 3948638 (1976-04-01), Pietsch

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