| abstract |
FIELD: manufacture of building materials. n SUBSTANCE: invention concerns manufacture of articles for heat-retention of furnace units and power equipment operated at surface temperatures up to 1100°C. Invention provides charge mixture containing, wt %: swollen vermiculite 20-60, refractory clay or kaolin 37-55, electrofilter dust 1-20, chamotte fraction below 0.063 mm 1-30, and structure-forming polyelectrolyte 3-5 (above 100%). Charge is moistened to form mass, which is aged in closed space for at least 24 h, molded into crude article, dried to residual moisture at most 5%, and fired at 1000-1100°C. Aforesaid polyelectrolyte is characterized by having carboxyl, amide, nitrile, and ester groups in polymer molecule. n EFFECT: reduced air and fire shrinkage and service deformations, raised softening point, simplified manufacture, and achieved absence of anisotropy of physicochemical and thermal characteristics with extremely low heat-conduction values. n 2 cl, 1 tbl, 4 ex |