Hardening granulated material at elevated temperatures

Details Hardening granulated material at elevated temperatures Hardening granulated material at elevated temperatures

C - Chemistry, Metallurgy

04

B

25/124

C04B 18/02 (2006.01) C04B 40/02 (2006.01)

Patent

CA 1313030

ABSTRACT A mixture of inorganic binder, water and fly ash is granulated; the formed granules are deposited upon a continuously supplied layer of fly ash embedding material and said fly ash layer together with granules is fed into a hardening reactor. The granules are hardened by injecting steam into the reactor so that the temperature of the granules is raised and maintained at a temperature comprised between 50 and 100°C. After curing the hardened granules are separated from the embedding material which is used for forming new granules. The embedding material has a water absorbing capacity of 15-25% and the pH of the moist embedding material is above 4.

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