Process for producing of high-purity alumina and hydraulic...

Details Process for producing of high-purity alumina and hydraulic... Process for producing of high-purity alumina and hydraulic...

C - Chemistry, Metallurgy

01

F

23/248, 261/66

C01F 7/38 (2006.01) C01F 7/18 (2006.01) C04B 7/32 (2006.01) C04B 7/36 (2006.01)

Patent

CA 1087375

ABSTRACT OF THE DISCLOSURE The present invention provides a process for producing of high-purity alumina and hydraulic cement from low-grade aluminium carriers by means of extraction of a disintegrating product obtained as a result of the phase conversion of dicalcium silicate, characterized by homogenizing the starting mixture expediently pulverized in common together with limestone, heating to a temperature of 700 to 900°C in direct and/or counter- flow heat exchange in a heat exchanger system, then keeping in a rotary kiln at sintering temperature for 5 to 10 minutes and finally, converting into alumina and hydraulic cement in a known manner.

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