Porous granulated steel slag composition and use of such as aggr

Details Porous granulated steel slag composition and use of such as aggr Porous granulated steel slag composition and use of such as aggr

1994-06-23

1995-12-26

Bell, Mark L.

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

C04B 2808

Patent

active

054783925

ABSTRACT:
The invention relates to a porous granulated steel slag having a weight per unit volume of less than 1 kg/dm.sup.3 in the loosely dumped state and of 0.99 kg/dm.sup.3 in the compacted dumped state, having a free calcium oxide content of at most 1/10 of the content in the non-granulated slag. The present steel slags are obtained by spraying a molten stream of steel slag with a sprayed pressurized stream of water. After comminuting, for example by grinding, and removal of iron, the porous granulated steel slag can be separated into a ferrite-richer fraction, which can serve as raw material for steel production, and a lower-ferrite fraction, which can serve as raw material for an inorganic binder. Granulated steel slag is also used as aggregate in building materials, as raw material in road building materials and for embankment materials, and as cement replacement material.

REFERENCES:
patent: 4124404 (1978-11-01), Suzuki et al.
patent: 4174961 (1979-11-01), Wolfs et al.
Sharanov et al., "Slag Granulation at Blast Furnace", 2283 Steel in the USSR, Aug. 1981, pp. 455-458.
Manual of Concrete Practice, "Grand Granulated Blast Furance Slag as a Cementitious Constituent in Concrete", ACI 226.1R-87, 1987, sections 1.4-1.7 (no month).
World Patents Index, SU-367064 1973: "Molten Slag Treatment . . . ". (no month).
Chemical Abstracts, 55747x vol. 115, No. 6 (Columbus, Ohio 1991). p./No. 6001 (no month).
Chemical Abstracts, 134036u vol. 109, p. 311 (Oct. 1988).
Cooper et alia, "Blast Furnace Slag Granulation". Iron and Steel Engineer, vol. 63, No. 7 (Jul. 1986).

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