Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing
Patent
1994-05-16
1995-03-07
Bell, Mark L.
Compositions: coating or plastic
Coating or plastic compositions
Inorganic settable ingredient containing
106707, 106767, 106769, 75434, 75560, C04B 500
Patent
active
053954432
ABSTRACT:
The invention relates to a method for preparing a hydraulically settable cement base material starting from steel slags formed in a steel-making process, which method comprises the formation, in steel slags in the liquid state, of a ferrite gradient by adding a ferrite-precipitating compound, the separation, if required, of the high-ferrite fraction formed, the separation of at least the low-ferrite fraction formed, the cooling and the comminution thereof to obtain a hydraulically settable material. The ferrite-precipitating compound used has preferably acid components, and can expediently generate silicic acid. At least before the cooling of the low-ferrite fraction, the aluminum content of the liquid slag material is regulated by the addition of an aluminate-containing material, such as bauxite. The high-ferrite fraction separated can be returned to the steel-making process to reduce or remove the addition of a flux in the production of steel.
REFERENCES:
patent: 2471562 (1946-03-01), Fitterer
patent: 4174961 (1979-11-01), Wolfs et al.
patent: 4652310 (1987-03-01), Tormari et al.
Bell Mark L.
Pelt & Hooykass B.V.
Sample David
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