Savoie Refractaires

Jacques P Schoennahl

Daniel Kuster

Jacques Thiery

Jean-Philippe Marie Bitouzet

Michel Dussaulx

Materials formed by refractory grains bound in a matrix of aluminum

The invention relates to refractory materials which comprise:

Refractory materials consisting of grains bonded by a binding phase

The invention relates to a refractory part for a device for regulation or interruption of a jet of steel, characterized in that it is formed from a refractory material essentially consisting of

Refractory parts for devices for regulation or interruption of a jet of

The invention relates to refractory materials having high resistance to corrosion, high mechanical strength at elevated temperature and high resistance to thermal shock, comprising:

Refractory materials formed from refractory grains bonded by a sialon

Compound concrete composition for the manufacture of moulds, comprising: (1) a binder which comprises an alkaline-earth mineral substance, a constituent made up of fine particles of a compound other than an oxide, 90% of which have a particle size of between 1 and 150 .mu.m with a median diameter of between 3 and 20 .mu.m, these fine particles comprising particles of a substance which has a thermal conductivity higher than approximately 30 W/mK, chosen from silicon carbides, silicon carbonitrides, silicon nitrides, boron carbides, titanium carbides and tungsten carbides and a constituent made up of ultrafine particles at least 70% of which have a particle size smaller than 1 .mu.m with a median diameter of between 0.3 and 0.8 .mu.m, (2) water optionally with the addition of a dispersant, and (3) fillers comprising metal granulates and metal fibres, wherein the water/binder ratio is lower than 0.20 and the concrete composition has a thermal conductivity at 200.degree. C. which is equal to or higher than 5 W/m K.

Concrete composition for the manufacture of moulds, mould and process

A tuyere opening assembly of a vertical furnace or reactor includes at most four prefabricated elements made of moulded refractory concrete, and a lining therein of ceramized refractory keys of identical shape and size arranged therein for receiving a burner or a tuyere.

Tuyere blocks of vertical reactor furnaces

The invention relates to a refractory composition comprising, by weight:

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Villeurbanne, France

Jacques P Schoennahl