C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
39/104
C22B 9/02 (2006.01) B01D 39/20 (2006.01) C04B 38/08 (2006.01) C21C 1/00 (2006.01)
Patent
CA 1219441
Abstract The ceramic, porous filter body described in the claims is designed to overcome the lack of high temperature resist- ant thermoshock resistant and mechanical stable bodies for the filtration of metals, preferentially of iron and ferr- ous alloys. This filter body has a temperature resistance of 1600° C, a linear thermal coefficient of expansion of 3 - 7 x 10-6/°C and consists of hollow spheres based on min- imum one homogeneous distributed refractory material and another refractory material, which at high temperature by chemical reaction forms with the hollow spheres a solid refractory binding phase. A process for the production of such a filter body is des- igned such, that the spheres of the refractory materials are mixed with a powderous binding phase, then formed to a porous body and then, by retention of the porous homogen- eous structure under formation of new refractory composi- tions by heat treatment are chemically reacted, at least in the contact areas of the spheres.
447191
Dellapina Marco
Gauckler Ludwig
Kampfer Konrad
Rieger Wolfhart
Marcoux & Sher Swabey Mitchell Houle
Swiss Aluminium Ltd.
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