Abstract: The invention relates to a method for repairing, in a hot state, a region of a tank in a glass furnace, referred to as the “region to be repaired”, by means of a repair product (P), the method involving the following steps, at a temperature greater than 300° C.: a) defining a receiving space in the region to be repaired, referred to as the “region to be filled”, the region to be filled (10) having a bottom (12; 12?); b) coating the bottom, the coating time, from the start of the introduction of the repair product into the region to be filled to the time at which the bottom is completely covered with the repair product, lasting less than 14 minutes; c) filling the region to be filled with the repair product, the rate of increase (V) in the repair product in the region to be filled being, at any time during the filling step, greater than or equal to 3 mm/min.

Abstract: Feeder channel for molten glass including an infrastructure including a block self-cast and sintered in situ. Furthermore, a method for manufacturing a block of such an infrastructure and a supply channel for a glassmaking furnace are claimed.

Abstract: A method for manufacturing sintered refractory grains containing Cr2CO3 from an initial refractory product including one or more chromium that includes: A) optionally, \crushing the starting refractory material; B) grinding a filler, comprising said starting refractory material in a liquid medium to obtain a suspension of particles of said starting refractory material; C) preparing a starting mixture including at least 1 wt % of particles of the suspension obtained during the preceding step; D) shaping the starting mixture into the shape of a preform; E) optionally drying the preform obtained in step D); F) sintering the preform so as to obtain a sintered body; G) optionally grinding the sintered body; and H) the optional selection by particle size.

Abstract: The invention relates to a particulate powder, said powder having a median circularity of greater than 0.87 wt % and less than 9.0 wt % of particles having a size greater than 100 ?m. The powder and at least 80 wt % of the particles have a chemical composition in wt % on the basis of the oxides and for a total of 100%: Cr2O3+Al2O3+ZrO2+MgO+Fe2O3+SiO2+TiO2?90%; Cr2O3+Al2O3+MgO?60%; Cr2O3?9%; 20%?SiO2?0.5%; and other oxides: ?10%. The invention can be used for a glass furnace.

Abstract: A device selected from among a glass furnace and a channel for dispensing the glass comprising a block and/or a coating made of a sintered material obtained by sintering a particular mixture comprising a chromium oxide content, indicated as “CrT”, of between 10% and 82%. The die fraction is such that 0.39·(CrT)+24<CrM<0.39·(CrT)+52, CrM denoting the chromium oxide content by weight of the die fraction in wt % on the basis of the oxides of the die, and the aggregate is such that xII?97%, xIII?70%, and xIV?xIII?70%, CrG denoting the chromium oxide content by weight of one grain in wt % on the basis of the oxides of said grain.

Abstract: Feeder channel for molten glass including an infrastructure including a block self-cast and sintered in situ. Furthermore, a method for manufacturing a block of such an infrastructure and a supply channel for a glassmaking furnace are claimed.

Abstract: A method for manufacturing sintered refractory grains containing Cr2CO3 from an initial refractory product including one or more chromium that includes: A) optionally, \crushing the starting refractory material; B) grinding a filler, comprising said starting refractory material in a liquid medium to obtain a suspension of particles of said starting refractory material; C) preparing a starting mixture including at least 1 wt % of particles of the suspension obtained during the preceding step; D) shaping the starting mixture into the shape of a preform; E) optionally drying the preform obtained in step D); F) sintering the preform so as to obtain a sintered body; G) optionally grinding the sintered body; and H) the optional selection by particle size.

Abstract: The invention relates to a particulate powder, said powder having a median circularity of greater than 0.87 wt % and less than 9.0 wt % of particles having a size greater than 100 ?m. The powder and at least 80 wt % of the particles have a chemical composition in wt % on the basis of the oxides and for a total of 100%: Cr2O3+Al2O3+ZrO2+MgO+Fe2O3+SiO2+TiO2?90%; Cr2O3+Al2O3+MgO?60%; Cr2O3?9%; 20%?SiO2?0.5%; and other oxides: ?10%. The invention can be used for a glass furnace.

Abstract: A device selected from among a glass furnace and a channel for dispensing the glass comprising a block and/or a coating made of a sintered material obtained by sintering a particular mixture comprising a chromium oxide content, indicated as “CrT”, of between 10% and 82%. The die fraction is such that 0.39·(CrT)+24<CrM<0.39·(CrT)+52, CrM denoting the chromium oxide content by weight of the die fraction in wt % on the basis of the oxides of the die, and the aggregate is such that xII?97%, xIII?70%, and xIV?xIII?70%, CrG denoting the chromium oxide content by weight of one grain in wt % on the basis of the oxides of said grain.

Abstract: The method for producing a piece made of sintered silica includes the following steps: a) casting a slurry, which is based on an amorphous silica powder and on a liquid, between the inner (14) and outer (12) parts of a mold (10) in such a manner as to delimit a wall (38) of the piece (40); b) evacuating, at least in part, the liquid; c) removing the piece from the mold whereby obtaining a green piece; d) additionally drying the green piece, and; e) sintering the green piece. This method is characterized in that in step b), the solvent is evacuated through a single inner (14) and outer (12) part of the mold (10) in at least one are delimiting a useful portion of the wall (38), the impermeable part having a deformable lining (30).