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AssigneeComurhex
InventorsGilbert Schall, Sylvie Davied, Robert Faron, deceased
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A thermal decomposition method useful in the nuclear industry for preparing a powdered mixture of metal oxides having suitable reactivity from nitrates thereof in the form of an aqueous solution or a mixture of solids. According to the method, the solution or the mixture of solids is thermomechanically contacted with a gaseous fluid in the contact area of a reaction chamber, said gaseous fluid being fed into the reaction chamber at the same time as the solution or mixture at a temperature no lower than the decomposition temperature of the nitrates, and having a mechanical energy high enough to generate a fine spray of the solution or a fine dispersion of the solid mixture, and instantly decompose the nitrates. The resulting oxide mixtures may be used to prepare nuclear fuels.
A process for obtaining a mixture of pulverulent oxides of metals, of appropriate reactivity, belonging the nuclear industry, from a mixture of nitrates of said metals in the form of an aqueous solution or of a mixture of particulate solids said process comprising, in a contact zone of a reaction chamber, thermomechanically contacting said aqueous solution or said mixture of particulate solids with a gaseous fluid introduced simultaneously into the reaction chamber, said gaseous fluid being at a temperature at least as high as the decomposition temperature of the nitrates and having sufficient mechanical energy to produce a sufficiently fine pulverization of the solution or of the dispersion of said mixture of particulate solids, as to instantaneously bring about the decomposition of the nitrates.
Dependencies are inferred from the claim text.