Process for forming a vitreous layer on a refractory surface
AssigneeGlaverbel
InventorsMarc Van Den Neste, Jean-Pierre Robert, Laurent Delmotte
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Abstract
A process for forming a vitreous layer on a refractory surface, in which a vitrifying agent is projected by means of an apparatus against the surface with an oxygen-containing carrier gas and simultaneously with a combustible gas, the latter generating a combustion flame, characterized in that the vitrifying agent comprises particles of cullet and in that the flame generated provides, at least partially, the heat needed to form the vitreous layer on the surface. The vitreous layer thus formed makes it possible to prevent the build-up, on the refractory walls of high-temperature ovens, of dust or by-products coming from the raw materials and/or their reaction products.
Claims36
Process for forming a vitreous layer on a refractory surface, in which a vitrifying agent is projected by means of an apparatus against the said surface with an oxygen-containing carrier gas and simultaneously with a combustible gas, the latter generating a combustion flame, the vitrifying agent including particles of borosilicate cullet and the flame generated providing, at least partially, the heat needed to form the vitreous layer on the surface.
Process for forming a vitreous layer on a refractory surface, in which a vitrifying agent is projected by means of an apparatus against the said surface with an oxygen-containing carrier gas and simultaneously with a combustible gas, the latter generating a combustion flame, the vitrifying agent including particles of soda-lime cullet containing, by weight, 55%-75% SiO2, 0%-7% Al2O3, 0%-5% B2O3, 0%-16% CaO, 0%-10% MgO, 10%-20% Na2O, 0%-10% K2O, 0%-10% BaO, 0%-10% SrO, 0%-5% ZrO2, and the flame generated providing, at least partially, the heat needed to form the vitreous layer on the surface.
Process for forming a vitreous layer on a refractory surface, in which a vitrifying agent is projected by means of an apparatus against the said surface with an oxygen-containing carrier gas and simultaneously with a combustible gas, the latter generating a combustion flame, wherein the vitrifying agent comprises particles of cullet and in that the flame generated provides, at least partially, the heat needed to form the vitreous layer on the surface, characterized by the following features (A) through (G):
- (A) the carrier gas is oxygen;
- (B) the combustible gas is selected from the group consisting of propane and acetylene;
- (C) the vitrifying agent comprises at least one of soda-lime cullet and borosilicate cullet;
- (D) the cullet particles have a diameter of less than 2000 microns;
- (E) the vitrifying agent comprises cullet and at least one additive;
- (F) the vitrifying agent is projected onto a surface having a temperature of between 20 degrees and 1400 degrees Celsius;
- (G) the refractory surface forms part of a coke oven.
Dependencies are inferred from the claim text.