CHARGE MATERIAL FOR PRODUCTION OF NONSHRINKING, POROUS, FLAMEPROOF HEAT INSULATING MATERIAL Russian patent published in 2012 - IPC C04B38/02 

FIELD: building and metallurgy.

SUBSTANCE: invention refers to the field of building and metallurgy. The charge material for production of porous, nonshrinking, flameproof heat insulating material includes, weight %: aluminum 5,0-5,5, periclase 15,0-28,0, high-alumina cement no more than 6,5, densifier 1,0-2,0, electrocorundum no more than 100 and a phosphate binder in the amount of 47-82 % over 100 from the mentioned mixture of the powdered components, as electrocorundum - a mixture of powders of different grades with the fraction content of the powders, weight %: grade F280 with the average grain size d_av=30-40 µm - 18-25; grade F150 d_av=80-100 µm - 13-15; grade F80 d_av=160-200 µm - 22-25; grade F54 d_av=300-400 µm - 7-10; periclase in the powder form of PPTI-92 grade with continuous particle-size distribution with the screening residue 05 of no more than 15 %, as a densifier - mortar of molten periclase-chromite of MPHV grade, as a binder - alumina-borophosohate or aluminophosphate. Fine-grain powder with a spherical shape of grains is used as aluminum with the maximum size of the particles that does not exceed 50 µm in diameter.

EFFECT: reduction of minimum shrinkage of materials, increase of ultimate compressive strength at higher usage temperatures.

2 cl, 3 ex, 1 tbl