PROCESS FOR MANUFACTURING DINAS PRODUCTS Russian patent published in 1997 - IPC

FIELD: laying of coke batteries and lining of metallurgical and glass- making furnaces. SUBSTANCE: blend comprises (wt%): 90.0- 96.0 quartzite; 0.5-7.0 industrial silicon; 2.0-2.8 mineralizer; 0.7-1.0 temporary binder. Pressed products are dried and roasted at 1400-1420 C. Roasting time at temperatures ranging from 1400 to 1420 C is 66-84 hours, roasting operation being carried out at 1410-1420 C lasts 12-14 hours. Characteristics; products comprise 95.7- 96.0% SiO₂ and have density of 2.31 g/cubic cm, open porosity of 17.2-19.9%, compressive strength of 45.2-65.0 H/sq.mm. Refractiveness is 1690-1710 C, initial strain temperature under load of 0.2 H/sq.mm is 1650-1670 C, additional growth at 1450 C (maintained for 2 hours) is 0.0-0.5% at 1500 C (maintained for 2 hours) is 0.0-0.06%, residual quartz content is 1-2%. EFFECT: more efficient manufacturing process of Dinas products. 2 tbl