| 摘要 |
FIELD: manufacture of construction materials, heat and sound-proofing of structures of buildings of various assignment, various applications in textile, furniture and medical industries. SUBSTANCE: basalt-carrying rock is heated prior to loading into furnace, rock is melted in electric arc furnace of bottom type with carbon electrodes. Before cooling melt is heated to temperature exceeding melting temperature by factor of 50-250 C and is endured in stabilization chamber of furnace till averaged composition of glass mass with following proportion of key components 3.0 <(Al2O3+SiO2)/(CaO+MgO) > 7.0; FeO/Fe2O3 > 0.5; FeO+Fe2O3=7.0-14.5% and iron melt are won. Then iron melt is removed and cooled melt of glass mass is poured out through spinneret. Glass jet is fanned with steam. Technological line for manufacture of mineral wool articles includes rock weighing machine, melting furnace, device to cool melt to temperature of production of fibers, discharging unit, unit to fan melt, chamber for precipitation of fibers and devices to form articles. Technological line is equipped with heat exchanger. Electric arc melting furnace of bottom type is fitted with carbon electrodes and with stabilization chamber located in its lower part. Bottom of furnace has drain hole for removal of iron melt and discharging unit for output of melt of glass mass manufactured in the form of spinneret with separable bushing. Fanning unit comes in the form of ejector mounted for movement in longitudinal and lateral directions. EFFECT: expanded technological capabilities in usage of basalt rocks of wide range, simplified technology, reduced technological cycle and increased quality of manufactured articles. 8 cl, I dwg, 3 tbl |
