Saint-gobain Centre De Recherches Et D'etudes Europeen

Cyril Linnot

Olivier Citti

Thibault Champion

Lionel Moitrier

Richard Avedikian

Yves Marcel Leon Boussant Roux

Michel Bobo

Yves Marcel Léon Boussant Roux

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.

Method of manufacturing a feeder channel for molten glass

A method for manufacturing sintered refractory grains containing CrCOfrom 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.

Method for manufacturing refractory grains containing chromium(III) oxide

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 &#x3bc;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%: CrO+AlO+ZrO+MgO+FeO+SiO+TiO&#x2267;90%; CrO+AlO+MgO&#x2267;60%; CrO&#x2267;9%; 20%&#x2267;SiO&#x2267;0.5%; and other oxides: &#x2266;10%. The invention can be used for a glass furnace.

Chromium oxide powder

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&#xb7;(CrT)+24&#x3c;CrM&#x3c;0.39&#xb7;(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&#x2267;97%, xIII&#x2267;70%, and xIV&#x2266;xIII&#x2212;70%, CrG denoting the chromium oxide content by weight of one grain in wt % on the basis of the oxides of said grain.

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Lyons, France

Cyril Linnot