Document Type and Number:
Japanese Patent JPS5129179
Kind Code:
B1
Abstract:
1362829 Alumina cement CIMENTS LAFARGE 5 Oct 1971 [9 Nov 1970] 46268/71 Heading C1H A lime and silica rich high alumina cement has the oxide analysis: 8-10% SiO2, 1-2% TiO2, 26-29% Al2O3, 14-16% Fe2O3, 0% or traces FeO and 45-48% CaO, and comprises CA, C2S, C12A7 and ferrites (also C2AS and C6A4S in examples). The cement may be made by crushing together a siliceous bauxite and a limestone to form a mixture having the following oxide analysis SiO2 6-8%, TiO2 1-2%, Al2O3 18 to 20%, Fe2O3 8-11%, CaO 30-34%, MgO 0 or traces, fusing the mixture in an oxidizing atmosphere containing O2 at 1400 C.-1500 C. cooling at between 250 C. to 1400 C./hour and grinding to Blaine specific surface of 2500 to 3500 cm.<2>/g. Lithium carbonate and calcium borate may be added to the cement.
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Application Number:
JP7762171A
Publication Date:
August 24, 1976
Filing Date:
October 05, 1971
Export Citation:
International Classes:
C04B7/32; (IPC1-7): C04B7/32