REFRACTORY FOAMED CARBON-CONTAINING MATERIAL Russian patent published in 2005 - IPC

FIELD: building and refractory materials.

SUBSTANCE: invention relates to manufacturing light porous carbon-containing refractory materials. Invention proposes material showing inorganic cellular structure prepared by foaming and hardening the slip composition prepared from ground charge with a gas-forming agent - finely divided crystalline silicon mixed with water glass in the following mass ratios of components in the slip composition: water glass : silicon = (3-6):1 and charge : water glass = (1.0-1.5):1. Charge comprises components in the following ratio, mas. p. p.: mineral filling agent, 45-53; calcined shungite, 15-22; aluminum powder, 10-15. Quartz sand, quartzite, perlite, vermiculite, dinas, cement fly ash and slags are used as a mineral filling agent, Foamed material comprises 12-20 wt.-% of silicon carbide and 25-51 wt.-% of kyanite prepared by exothermic reaction at 1400-1700°C carrying out in volume of hardened porous material. Material shows porosity 60-81% and heat conductivity 0.08-0.18 Wt/m x K at 20°C and shows high mechanical indices and stability in oxidizing medium. Material can be prepared without large energy and labor consumptions.

EFFECT: improved and valuable properties of material.

2 cl, 1 tbl