| abstract |
Process for the production of molten silicate materials containing 40 to 67 wt.% Si0 2 , 3 to 20 wt.% A1 2 0 3 , 2 to 18 wt.% Fe0 + Fe 2 O 3 , 2 to 9 wt .-% alkali oxides and 8 to 30 wt .-% alkaline earth metal oxides, in which as the basic material (ien) municipal waste (municipal waste), industrial waste, sewage sludge from paper manufacture, sewage sludge, sewage sludge, coal and / or oil shale, optionally in a mixture with agricultural waste be used. The combustible proportions are burned in a boiler and the incombustible slag melt thus obtained is degassed at 1100 to 1500 ° C. for 1 to 4 hours, additives being added if necessary to correct the composition.n n n The molten silicate materials thus obtained can be used in the field of ceramics and construction, for example for artificial stones, wall panels and building covers. |