| 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 DEG 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 DEG 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> |
