| 摘要 |
<p>The method is implemented starting with a feedstock of dry, solid material composed predominantly of a ternary mixture of a first oxide constituted by SiO2, a second oxide constituted by Na2O and/or K2O , and a third oxide constituted by CaO and/or PbO. In the case of ash produced by and incinerator, the second oxide is scarce and is added to the feedstock in a proportion such as to give a composition having a pour point of the order of 1450 °C. If the mixture is constituted by dust obtained from electrostatic precipitators for the smoke discharged from an incinerator, the first oxide is scarce and, in this case also, is added in a proportion such as to give a composition having a pour point of the order of 1520 °C. In both cases, the feedstock is melded in a furnace to produce a bath of vitreous material and the bath is subjected to a refining step. Upon completion of the refining step, the vitreous material is cast. As a result, at least substantially stable, solidified glass which can be re-used for the production of products or as an inert material is obtained.</p> |
