METHOD FOR PREPARING ARTICLE FROM MULLITE-CONTAINING REFRACTORY MATERIALS Russian patent published in 2003 - IPC

FIELD: refractory industry. SUBSTANCE: for reduction of opened porosity and enhancement of chemical stability in chlorine-containing media on stage for preparing charge components cake roasted at temperature 1300-1400 C is prepared that comprises the following components, wt.-%: SiO₂, 55-57; Al₂O₃, 11-13; CaO, 22-24; MgO, 2-4; TiO₂, 1-3; ZnO, 1-3; R₂O, Fe₂O₃, F, the balance, Prepared cake is added to charge as small-dispersed mixture of combined grinding fraction <0.01 mm of the following composition, wt.-%: cake, 19-44; clay, 14-20; mullite-containing filling agent, 41-61 in the following ratio of charge components, wt.-%: 67-73% of mullite-containing granular filling agent of fraction <0.09 mm; small-dispersed mixture of combined grinding, the balance; temporal technological binding agent 5-12%, above 100%. Then articles are dried and roasted. This method allows preparing production with enhanced exploitation indices. Invention can be used for preparing structural lining members in devices working in contact with chlorine-containing media. EFFECT: improved preparing method, low cost. 1 tbl