Insulating, refractory molded body, especially plate, and process for its manufacture and its usage
AssigneeRefratechnik Holding GmbH
InventorsHelge Jansen, Thomas Schemmel, Petra Stein, Michael Schölwer
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Abstract
An unfired, refractory molded body (1), especially a plate, especially for thermal insulation of molten metal and/or an ingot solidifying from molten metal, that includes a binding agent matrix (2) of a set binder and aggregate grains (3) of biogenic silicic acid, preferably of rice husk ash, which are incorporated into the binding agent matrix (2), wherein the binding agent matrix (2) consists of silica gel, as well as a process for its production and its usage.
Claims20
An unfired, refractory molded body comprising a binding agent matrix and an aggregate, the binding agent matrix consisting of silica gel as a binding agent and the aggregate consisting of at least one aggregate material of aggregate grains which grains are incorporated into the binding agent matrix,
- wherein with respect to a total dry mass of the aggregate, the aggregate comprises at least 50 wt. % of biogenic silicic acid as rice husk ash, and 0 to <10 wt. % of at least one additional aggregate material of a refractory material, which is not solely composed of SiO2, including expanded perlite, expanded vermiculite, expanded clay, inorganic fibers, fly ash, filter dust, or combinations thereof,
- wherein the molded body has a softening point, determined with a heating microscope according to DIN EN 51730:2007-09 of 1500 to 1700° C.
Dependencies are inferred from the claim text.