CERAMIC MIXTURE Russian patent published in 2016 - IPC C04B33/138 

FIELD: ceramic industry.

SUBSTANCE: invention relates to compositions of ceramic mixtures used in making facade tiles. Ceramic mixture contains, wt%: brick clay 83.0-84.0; blast-furnace slag 6.0-7.0; phosphorite 6.0-7.0; wollastonite 3.0-4.0. In ceramic mixture composition can be used brick clay of any deposits, for example, clay of Malo-Stupkinskogo deposit, characterised by following chemical composition, wt%: SiO₂ 52.0-75.1; Al₂O₃ 12.67-21.94; Fe₂O₃ 2.7-6.44; CaO 1.76-7.07; MgO 1.08-5.42; SO₃ 0.87; % points. 3.01-4.2. Blast-furnace slag is characterised by following chemical composition, wt%: SiO₂ 36.0-41.0; Al₂O₃ 8.0-11.0; FeO 0.2-0.7; CaO 40.0-48.0; MgO 6.0-10.0; MnO 0.1-1.0; SO₃ 0.5-2.2. Phosphorite sedimentary rock consisting of fine-grained mixture of apatite with admixture of quartz, carbonate, clay particles, etc. Wollastonite is mineral, calcium metasilicate, containing, wt%: SiO₂ 51.75; CaO 48.25.

EFFECT: technical result of invention is low annealing temperature of articles.

1 cl, 1 tbl