|6987077||Fired spinel complex oxide and method for preparing the same|
A fired spinel complex oxide is produced by firing a mixture containing a slag by-produced in chromium refining, a reducer, and a silica-containing material, and is essentially composed of: 29 to 40 percent by weight of Fe2O3; 15 to 20 percent ...
|6660673||Use of particulate materials containing TiO2 in refractory products|
In order to reduce wear on refractory linings due to corrosion and the infiltration of slags and molten metals, particulate materials containing TiO2 are added to the refractory products consisting of a mixture of aggregates and binding agents....
|5595948||Magnesia-titania refractory and method for manufacturing the same|
A refractory is disclosed which contains integrally sintered magnesia particles forming the skeleton of the refractory and a mineral phase of magnesium orthotitanate (Mg2 TiO4) formed between the magnesia particles, thus giving an in...
|5322827||Burned refractories with low soluble chromium|
A burned chrome-containing refractory and method which provides a refractory having less than 5 ppm total soluble chromium. Such product is obtained by adding to the starting mix less than 10 wt. % (often less than 3 wt. %) zirconia, silica, zircon, or mo...
|5096642||Process for producing a high density ceramic of perovskite|
A process for producing a high density ceramic of perovskite represented by the formula: ABO3 wherein A is one or more metal elements coordinated with 12 oxygen atoms, and B is one or more metal elements coordinated with 6 oxygen atoms, which c...
|4999325||Rebonded fused brick|
A rebonded, fused brick resulting from burning a mix consisting essentially of a fused magnesite chrome grain, a fused chrome-magnesite grain or mixtures thereof, and a chrome ore having a Cr2 O3 /(Al2 O3 +Fe
|4775648||Heavy ceramic shaped material, process for the production thereof and the use thereof|
Heavy ceramic shaped material with a content of at least one of the components magnesia, fired dolomite, chromite and spinel, characterized by a microcrack system substantially homogeneously distributed in the shaped material structure, as well as process...
|4751208||Method of producing a spinel type ceramic sintered body|
A spinel type ceramic sintered body is provided starting from a chromiferous slag which is a waste discharged from sodium chromate production, said sintered body being reproducable by selecting the mole ratios of R2 O/MgO to 0.9-2.0 and SiO
|4574119||Chrome-magnesite refractories and method of preparation|
A refractory brick made from a size graded batch comprising 20-30 weight percent magnesite containing less than 0.8 weight percent silica, and the balance a chrome ore. The chrome ore includes oxides of chromium, aluminum and iron wherein the ratio betwee...
|4522926||Aluminum resistant refractory composition|
A refractory composition for use in contact with molten aluminum alloys containing a refractory aggregate, a binder and 9Al2 O3.2B.sub.2 O3. The aluminum borate may be of the type produced as a by-product in the production...
|4343989||Magnesium oxide based heat storage device|
A cast magnesium oxide based structure is utilized as a heat storage material. In preferred embodiments, the magnesium oxide heat storage material is cast directly about a source of heat. In another embodiment, a block of cast magnesium oxide based heat s...
|4315992||Carbon-containing and uncarbonized sinter magnesia refractories|
A refractory brick or mass is comprised of 60 to 97% of sinter magnesia, an amount of a carbon-containing substance producing a residual content of 2 to 30% of carbon in an end product after carbonization, as determined by ASTM norm C 831-76, and 1 to 20%...
|4287167||Novel harzburgite and preparation thereof|
There is provided a novel harzburgite of the formula Pyx Ol.sub.(1-x) where x is a decimal number of from 0.001 to 0.4, Py is an abbreviation for pyroxene, and Ol is an abbreviation for olivine having a total iron oxide content of less than 5% ...
|4141743||Thermal spray powdered composite|
A composite powder suitable for use in thermal spray applications as a wear and/or corrosion resistant coating comprising chromic oxide, magnesium oxide, iron oxide, titanium oxide, and aluminum oxide....
|4126478||Production of periclase grain|
A high purity periclase grain having less than 8 volume % porosity, less than 2% SiO2, and a CaO:SiO2 weight ratio not over 1.0 is produced in a single fire process by mixing from 0.5 to 1.5% finely divided SiO2 with a mag...
|4115133||Unburnt refractory masses or bricks for metallurgical vessels based on chrome-ore and carbon-containing binder|
An unburnt refractory mass, which can be in the form of a brick, for use in vessels employed in metallurgical refining consisting essentially of chromium-ore, sintered magnesia and a carbon-containing binder, said mass consisting essentially of: 75 to 95%...
|4107255||Manufacture of improved fused cast refractory|
Basic fused cast refractory with principal crystal phases of periclase and magnesium-spinel is made by adding nonfused oxidic inorganic grog particles to molten mass of the refractory as it is cast into a mold cavity, thereby resulting in increased modulu...
Burned, magnesite-chrome refractory shapes having a lime to silica ratio between about 1.7 and 2.1 to 1, and a chromic oxide to aluminum oxide plus iron oxide ratio in excess of about 1.5 to 1....
|4039343||Improved performance direct bonded basic refractory brick and method of manufacture|
This invention provides improved high fired direct bonded basic magnesite-chrome refractory shapes, such as brick, characterized by the presence of chromium enriched spinel structures distributed in the matrix and bonding the individual periclase crystals...
|4033778||Process for making magnesia|
A process for making magnesia wherein a sludge of magnesium hydroxide is simultaneously dewatered and compacted to give a cake of magnesium hydroxide containing at least 67.5% by weight of solids and having a green bulk density of at least 1.15 grams/cc a...
|3989533||Composition for use in forming heat insulating hot top liners and method of making same|
A composition for use in forming a heat insulating hot top liner which comprises, by weight, 0 to 20% of a pulverized organic fibrous material, 0 to 40% of a pulverized inorganic fibrous material, 50 to 90% of a refractory material and sufficient liquid c...