US 11,905,198 B2
Product containing chromium 3 oxide for glass furnace
Thibault Champion, Villelaure (FR); Pierrick Vespa, Aix-en-Provence (FR); Lionel Moitrier, Mallemort (FR); Olivier Citti, Cavaillon (FR); Julien Pierre César Fourcade, Shrewsbury, MA (US); and Nabil Nahas, Cavaillon (FR)
Assigned to SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN, Courbevoie (FR)
Appl. No. 16/954,014
Filed by SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN, Courbevoie (FR)
PCT Filed Dec. 20, 2018, PCT No. PCT/EP2018/086310
§ 371(c)(1), (2) Date Jun. 15, 2020,
PCT Pub. No. WO2019/122196, PCT Pub. Date Jun. 27, 2019.
Claims priority of application No. 1762941 (FR), filed on Dec. 22, 2017; and application No. 1857097 (FR), filed on Jul. 30, 2018.
Prior Publication US 2021/0078893 A1, Mar. 18, 2021
Int. Cl. C03B 5/43 (2006.01); C04B 35/12 (2006.01); C04B 35/047 (2006.01); C04B 41/50 (2006.01); C03B 5/237 (2006.01); C03B 5/26 (2006.01)
CPC C03B 5/43 (2013.01) [C03B 5/2375 (2013.01); C03B 5/26 (2013.01); C04B 35/12 (2013.01); C04B 2235/3206 (2013.01); C04B 2235/3208 (2013.01); C04B 2235/3244 (2013.01); C04B 2235/3272 (2013.01); C04B 2235/3418 (2013.01)] 26 Claims
 
1. A glass furnace comprising an additive-containing product comprising, exclusively at the surface, an additive selected from:
phosphorus compounds other than glasses and vitroceramics,
WC, MoO3,
silicon carbide,
boron carbide,
silicon nitride,
boron nitride,
glasses comprising elemental phosphorus and/or iron and/or tungsten and/or molybdenum,
vitroceramics comprising elemental phosphorus and/or iron and/or tungsten and/or molybdenum,
and their mixtures,
said additive-containing product, without taking into account said additive,
having the following chemical analysis, as a percentage by weight on the basis of the oxides:
Cr2O3≥2%, and
Cr2O3+Al2O3+CaO+ZrO2+MgO+Fe2O3+SiO2+TiO2≥90%, and
Cr2O3+Al2O3+MgO≥60%,
the content by weight of additive being in the range 0.01% 6% on the basis of the additive-containing product.