Refractory article resistant to non-ferrous metal and production process thereof
AssigneeVesuvius France
InventorsGilbert Rancoule, Christian Martin, Jean-Denis Nicolas, Loic Wisniewski
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Abstract
A refractory article used at high temperature contains a silica, calcium silicate or mullite matrix with at least a surface having an open porosity filled at least partially with a sulfate, phosphate, or carbonate salt or a mixture of sulfate, phosphate or carbonate salts. The refractory article is resistant to the corrosion and build-up of non-ferrous metals and their alloys.
Claims15
1-14. (canceled)
Refractory article for use at high temperature having a silica, calcium silicate or mullite matrix with at least a surface having an open porosity wherein a sulfate, phosphate, carbonate salt or a mixture of thereof is present in the open porosity of at least a portion of at least a surface of the article and has a thermal decomposition temperature higher than 500° C. and wherein the solubility of the salt in water at 20° C. is higher than 100 g/l.
Process according to claim 11 wherein the first and second steps a) and b) are repeated.
Process according to claim 11 wherein the salt cation is selected form the group consisting of magnesium and zinc.
Process according to claim 11 further comprising a third step c) of applying a further coating.
Dependencies are inferred from the claim text.