Process for producing cement from metallurgical slag

Details Process for producing cement from metallurgical slag Process for producing cement from metallurgical slag

1994-09-19

1996-05-14

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

106714, 106789, C21B 308, C04B 506

Patent

active

055163572

ABSTRACT:
In a process for the preparation of cement from metallurgical slags, in which liquid slags from reduction processes and steelworks processes, e.g. blast furnace and converter slag, are mixed together and mixed with lime the procedure is such that in a first cooling phase at temperatures above 1000.degree. C., and preferably above 1200.degree. C., the cooling is slower than in a subsequent second cooling phase and that the solidified product obtained is granulated and/or ground in order to obtain directly cement with improved hydraulic properties, in particular increased final strength.

REFERENCES:
patent: 2116469 (1938-05-01), Karwat
patent: 4141722 (1979-02-01), Takai et al.
patent: 4268295 (1981-05-01), Yamamoto et al.
patent: 5255900 (1993-10-01), Schott
Database WPI, Derwent Publications Ltd., Section CH, Week 8616, Class L02, AN 86-103768-JP,A,61 048 455, Mar. 10, 1986.
Chemical Abstracts, vol. 111, No. 26, Dec. 25, 1989, Abs No. 238614p. Inoe Mamoru & Al: "Manufacture of binders from blast-furnace slags", & JP,A,1 176 250, Jul. 12, 1989.

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