Societe Europeenne Des Produits Refractaires

Societe Europenne Des Produits Refractaires

Jean-Pierre Remi

Guy Gehin

Jean-Pierre Kiehl

Jacques R Schoennahl

The invention relates to thermally insulating materials. It refers to a thermally insulating slab consisting of entangled refractory fibres, the major portion of the fibres being substantially parallel with the main faces of the slab, characterized in that the back of the slab bears a plurality of furrows or grooves distributed over the back. The slab is used for the insulation of furnaces and the like.

Thermally insulating slabs made of refractory fibers for the insulation

The invention relates to a heat-insulating slab formed by a plurality of continuous strips maintained in assembly side by side, each strip comprising entangled refractory fibres the major portion of which is perpendicular to the two main faces of the slab, the strips being maintained in assembly exclusively by means of a plurality of lines, ribbons or cords of an organic synthetic matter which adhere to the strips and are applied to the two main faces of the slab perpendicular to the strips. This slab is useful for insulating the inner surfaces of furnaces.

Insulating slab of refractory fibres

The invention relates to gas-permeable parts comprised, by weight, of (A) 60 to 90% of granules of a grain size from 5 mm to 0.2 mm formed from a material selected among the group consisting of a chamotte containing at least 42% of Al.sub.2 O.sub.3, mullite, fired gibbsite containing more than 90% Al.sub.2 O hd 3, sintered or fused cast corundum containing more than 95% Al.sub.2 O.sub.3, natural chromite, sintered MgO, zircon sand and stabilized zirconia, and (B) 10 to 40% of a bonding cement comprised a calcium aluminate, a material selected among SiO.sub.2, Al.sub.2 O.sub.3 and Cr.sub.2 O.sub.3 having a particle size between 100 A and 0.1 micron, and alumina having a particle size between 1 and 100 microns. These parts retain a high mechanical strength when heated between hydraulic setting and ceramization, and are useful for blowing a gas therethrough in order to stir molten steel and cast iron.

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Bron, France

Jean-Pierre Remi