Refratechnik Holding Gmbh

Petra Stein

Helge Jansen

Thomas Schemmel

Michael Schölwer

Christos Georgios Aneziris

Hans-Jürgen Klischat

Rainer Gaebel

A heat insulating plate (), preferably a covering plate (), especially for thermal isolation of molten metal, especially of molten steel, in a metallurgical vessel (), wherein the plate () includes a binding agent matrix () of at least one, set, temporary, organic binding material and aggregate grains () with and/or of biogenic silicic acid, preferably with and/or of rice husk ash, which grains () are incorporated into the binding agent matrix (), and to a method for production of the plate () and its use.

Plate, in particular covering plate for molten metal, and method for producing the plate and use thereof

An unfired, refractory molded body (), especially a plate, especially for thermal insulation of molten metal and/or an ingot solidifying from molten metal, that includes a binding agent matrix () of a set binder and aggregate grains () of biogenic silicic acid, preferably of rice husk ash, which are incorporated into the binding agent matrix (), wherein the binding agent matrix () consists of silica gel, as well as a process for its production and its usage.

Insulating, refractory molded body, especially plate, and process for its manufacture and its usage

An unfired, refractory molded body (), includes a binding agent matrix () containing at least one set, permanent binding material and aggregate grains () with and/or of biogenic silicic acid, preferably with and/or of rice husk ash, which grains are incorporated into the binding agent matrix (), for thermal isolation of a molten metal, especially of molten steel, and/or of a metal ingot solidifying from the molten metal, and also the use of the molded body () for thermal isolation of a refractory lining, in particular in a multiple-layer brick wall or in a heat-treatment furnace, or as a corrosion barrier, e.g. against alkali attack, or as a fire protection lining or as filter material for hot gases.

Use of a heat insulating molded body for isolation of molten metal against the atmosphere or against a metallurgical vessel

A molded, fireproof product, which contains graphite, in particular natural graphite, and is based on fireproof granular materials. The granular-material grains of the product are consolidated to form a molded body by means of a binder known per se and/or ceramic bonding. The product has a homogeneous mixture of at least two graphite types, which each have a different coefficient of thermal expansion. One graphite type is predominant by amount and the other graphite type acts as an auxiliary graphite type. The invention further relates to a method for producing a product and to the use of the product.

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Göttingen, Germany

Petra Stein