Plate, in particular covering plate for molten metal, and method for producing the plate and use thereof
AssigneeRefratechnik Holding GmbH
InventorsHelge Jansen, Thomas Schemmel, Petra Stein, Michael Schölwer
Life of this patent
Estimating the term…
Abstract
A heat insulating plate (1), preferably a covering plate (5a;b), especially for thermal isolation of molten metal, especially of molten steel, in a metallurgical vessel (6), wherein the plate (3) includes a binding agent matrix (2) of at least one, set, temporary, organic binding material and aggregate grains (3) with and/or of biogenic silicic acid, preferably with and/or of rice husk ash, which grains (3) are incorporated into the binding agent matrix (2), and to a method for production of the plate (1) and its use.
Claims30
(canceled)
The heat insulating plate (1) according to claim 29, characterized in that the plate (1) is configured such that the temporary binding material burns out under temperature load and the plate (1) disintegrates into a loose, free-flowing bulk material.
The heat insulating plate (1) according to claim 5, characterized in that the plate (1) disintegrates from a temperature of ≥150° C. and ≤800° C., preferably ≥200° C. and ≤400° C.
(canceled)
A heat insulating plate (1), preferably a covering plate (5a;b), especially for thermal isolation of molten metal, especially of molten steel, in a metallurgical vessel (6),
- wherein the plate (1) comprises a binding agent matrix (2) of at least one set binding material and aggregate grains (3) with and/or of biogenic silicic acid, preferably with and/or of rice husk ash, which grains (3) are incorporated into the binding agent matrix (2), characterized in that as additional aggregate material, the plate (1) comprises at least one expanding agent which expands under temperature load, preferably such that the plate (1) disintegrates into a loose, free-flowing bulk material.
The heat insulating plate (1) according to claim 29, characterized in that the expansion temperature of the expanding agent lies in the range of the ignition temperature of the temporary binding material.
The heat insulating plate (1) according to claim 29, characterized in that the temporary binding material pertains to a polymer, preferably a polysaccharide, which sets due to polycondensation and burns up without residue, preferably in an oxygen atmosphere.
The heat insulating plate (1) according to claim 29, characterized in that the plate (1) comprises as the temporary binding material cellulose, preferably methyl cellulose, and/or polyvinyl alcohol, preferably polyvinyl acetate and/or polyvinyl pyrrolidone, and/or lignin sulfonate.
(canceled)
Dependencies are inferred from the claim text.