METHOD OF MANUFACTURE OF BUILDING LIGHT-YELLOW CERAMICS AND ITS COMPOSITION Russian patent published in 2005 - IPC

FIELD: manufacture of ceramic materials on base of clay materials; manufacture of facing building bricks and facing tiles from red-burning low-melting clays.

SUBSTANCE: proposed method includes preparation of mineral additive, mixing this additive with clay, plastic molding of articles and burning. Additive is prepared according to slip process by grinding the clarifying component of additive with clay in the amount of 8-10% of mass of clarifying component; grinding is performed in ball mill to residue on sieve 0088 not exceeding 2-3%; then, hardening finely-dispersed component of additive is introduced into suspension. Slip thus obtained has density of 1.70-1.72 g/cm³. Slip is mixed with clay; part of clay is preliminarily dried to moisture content of 6-8%. Ceramic mass thus obtained is subjected to homogenization and aging for at least 24 h; burning is performed at temperature of 1020-1030°C. Marl at size of particles lesser than 2 mm and content of limestone no less than 75 mass-% is used as clarifying component and wollastonite concentrate at size of particles lesser than 0.063 mm and content of wollastonite no less than 80 mass-% is used as hardening finely-dispersed component.

EFFECT: enhanced mechanical strength, corrosion resistance and improved decorative properties of articles.

3 cl, 3 tbl, 1 ex