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US 6,887,810 B2Granted
Synthetic, refractory material for refractory products, and process for producing the product
AssigneeRefratechnik Holdings GmbH
InventorsPeter Bartha, Hans-Jurgen Klischat, Holger Wirsing, Guido Weibel
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Abstract
A material for refractory shaped bodies or compounds, the material being a pleonaste and/or a spinel of the pleonaste type. In addition to FeOx and Al2O3, the material also includes MgO. The ratio of the iron in the material is calculated as Fe2O3:Al2O3 and ranges from 30:70 to 60:40. The material contains from 20 to 60% by mass of MgO, as based on Fe2O3+Al2O3.
Claims20
A process for producing a refractory product or a refractory shaped body, comprising:
- producing an elasticizer material containing raw materials including Al2O3, MgO, and an iron compound,
- said raw materials being fused or sintered to form an elasticizer which is a pleonaste, and/or a spinel of a pleonaste type,
- a ratio of the iron provided in said elasticizer calculated as Fe2O3:Al2O3, ranging from 30:70 to 60:40,
- said elasticizer being formed to contain from 20 to 60% by mass of MgO, based on Fe2O3+Al2O3,
- said elasticizer being solidified and crushed, and then being prepared by classifying said elasticizer into corresponding grain sizes;
- and
- said elasticizer then being mixed with a refractory mineral metal-oxide main component defined as a resistor.
4 more elements
Dependencies are inferred from the claim text.