High density magnesia clinker and process for its production

Details High density magnesia clinker and process for its production High density magnesia clinker and process for its production

C - Chemistry, Metallurgy

04

B

261/29

C04B 35/04 (2006.01) C04B 2/10 (2006.01) C04B 35/043 (2006.01)

Patent

CA 1219290

ABSTRACT OF THE DISCLOSURE High density magnesia clinker characterized by having a chemical composition, as oxides in weight %, of MgO 97.5% or more CaO 0.8 - 2.0% SiO2 0.12 - 1.0% Fe2O3 0.3% or less Al2O3 0.15% or less B2O3 0.03% or less with a bulk density of at least 3.48 g/cm3. The said high density magnesia clinker can be produced by forming magnesium oxide by calcination of naturally occurring magnesite having a composition, based on ignition in weight %, MgO 97.5% or more CaO 0.8 - 2.0% SiO2 traces to 0.15% Fe2O3 0.3% or less Al2O3 0.15% or less B2O3 0.1% or less, grinding the same after, or with, addition of amorphous silica, silica gel or a silicon compound capable of forming SiO2 by dead-burning in such a manner as to have the SiO2 content of 0.12-1.0% after dead-burning and dead-burning.

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