COLOURED SLAG GLASS Russian patent published in 2011 - IPC C03C6/10 C03C4/02 

FIELD: chemistry.

SUBSTANCE: invention relates to production of coloured slag glass based on metallurgical industry wastes. The coloured slag glass contains blast-furnace slag from metallurgical industry of the following composition, in wt %: SiO₂ - 16.5; Al₂O₃ - 6.21; MgO 9.57; CaO - 44.85; MnO - 7.33; FeO - 14.67; SO₃ - 0.37; P₂O₅ - 0.5. The glass also contains scrap glass, borax, raw materials Li₂CO₃, K₂CO₃, ZnO, with the following ratio of components in wt %: scrap glass 44.5-65.0; blast furnace slag 0.5-40.0; borax 10.0-20.0; Li₂CO₃ - 2.0-5.0; K₂CO₃ 3.0-6.0; ZnO - 0.5-3.5. The glass-melting temperature is equal to 1250 - 1300°C.

EFFECT: obtaining relatively cheap coloured slag glass with high degree of recycling industrial wastes, as well as low glass-melting temperature, wide working interval.

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