System for producing cementitious materials from ferrous blast f

Details System for producing cementitious materials from ferrous blast f System for producing cementitious materials from ferrous blast f

1996-08-27

1998-06-16

Czaja, Donald E.

Glass manufacturing

Melt disintegrator and solidifier including fluid-melt...

65 19, C03B 523

Patent

active

057662975

ABSTRACT:
Processes and systems for producing cementitious materials from ferrous blast furnace slags. Processes comprise mixing of a source of CaO with molten slag flowing from at least one slag tap hole of a blast furnace. Sufficient CaO is mixed with the molten slag to raise the ratio of CaO to SiO.sub.2, the C/S Ratio, of the slag to between about 1.06 and 1.25, while maintaining the Base Number of the molten slag less than about 1.55. The slag is then water granulated and ground to a predetermined degree of fineness. An activator then is added to the ground granulated slag. The C/S Ratio of the granulated slag determines the degree of fineness to which the granulated slag must be ground to achieve a desired hydration rate in the resultant cementitious material. Cementitious materials with C/S Ratios in this range may be ground less finely, yet possess the same hydration rates, as other more finely ground cementitious materials.

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