Grains for the production of a sintered refractory product, a batch for the production of a sintered refractory product, a process for the production of a sintered refractory product and a sintered refractory product

Disclosed is a ceramic composition comprising a plurality of at least semi-coherent particles with an average diameter ranging from 1 nm to 50 nm included within a matrix, wherein the matrix comprises one metal carbonate salt, metal oxide or metalloid oxide, the particles and the matrix share at least one metal element and the metal element is 10% to 80% of the total content of said matrix, and the composition has a lattice mismatch of less than 5%. Disclosed are also an article and methods for making the ceramic composition of the present invention.

Disclosed is a ceramic composition comprising a plurality of at least semi-coherent particles with an average diameter ranging from 1 nm to 50 nm included within a matrix, wherein the matrix comprises one metal carbonate salt, metal oxide or metalloid oxide, the particles and the matrix share at least one metal element and the metal element is 10% to 80% of the total content of said matrix, and the composition has a lattice mismatch of less than 5%. Disclosed are also an article and methods for making the ceramic composition of the present invention.

The invention relates to granules composed of agglomerated reactive bulk material and a binder matrix, the binder matrix comprising as binder an organic or inorganic salt.

The invention relates to granules composed of agglomerated reactive bulk material and a binder matrix, the binder matrix comprising as binder an organic or inorganic salt.

A continuous casting nozzle 1 includes a nozzle main body 2 and a nozzle hole 3 formed to extend through the nozzle main body so that molten steel flows therethrough, and an alumina-hardly-adherable refractory 5 containing components of MgO, CaO and SiO.sub.2 is disposed on an inner surface defining the nozzle hole. Consequently, even when a temperature of the nozzle is low, adhesion of inclusions in molten steel to a portion in contact with the molten steel can be reduced, with the result that the nozzle hole can be prevented from being blocked and the continuous casting nozzle can contribute to an improvement in the steel quality.

A silicon carbide porous body includes: (A) silicon carbide particles as an aggregate; and (B) at least one selected from the group consisting of metallic silicon, alumina, silica, mullite and cordierite. The silicon carbide porous body has amorphous and/or crystalline SiO.sub.2 or SiO on a surface(s) of the component (A) and/or the component (B). The silicon carbide porous body contains 6% by mass or less of -cristobalite in the amorphous and/or crystalline SiO.sub.2 or SiO.

A silicon carbide porous body includes: (A) silicon carbide particles as an aggregate; and (B) at least one selected from the group consisting of metallic silicon, alumina, silica, mullite and cordierite. The silicon carbide porous body has amorphous and/or crystalline SiO.sub.2 or SiO on a surface(s) of the component (A) and/or the component (B). The silicon carbide porous body contains 6% by mass or less of -cristobalite in the amorphous and/or crystalline SiO.sub.2 or SiO.

Plants and methods recover spent refractory material and comprise at least one receiving area for said refractory material, at least one material sieving area, at least one magnetic separation area, and at least one sorting area. Said receiving area communicates with a first sieving area divides said refractory material in at least two fractions based on sizes of said refractory material. A second sieving area divides a fine fraction into at least two sub-fractions.

Plants and methods recover spent refractory material and comprise at least one receiving area for said refractory material, at least one material sieving area, at least one magnetic separation area, and at least one sorting area. Said receiving area communicates with a first sieving area divides said refractory material in at least two fractions based on sizes of said refractory material. A second sieving area divides a fine fraction into at least two sub-fractions.