Radioactive nuclear waste solidified iron phosphate glass with low alloy corrosivity and preparation method of radioactive nuclear waste solidified iron phosphate glass

Abstract

The invention discloses radioactive nuclear waste solidified iron phosphate glass with low alloy corrosivity and a preparation method of the radioactive nuclear waste solidified iron phosphate glass. By increasing the content of oxides with high light alkalinity in an iron phosphate glass system, the light alkalinity of the glass is improved, the oxidability of the glass is improved, and when the iron phosphate glass is in contact with an alloy in engineering operation, an oxidation film can be rapidly formed on the surface of the alloy, so that corrosion of a glass melt to the alloy is hindered; the long-term operation stability of nuclear waste glass curing treatment is improved, and the production efficiency is improved. The iron phosphate glass provided by the invention is prepared from the following components: 35 to 75 mol percent of P2O5, 10 to 40 mol percent of Fe2O3, 0 to 10 mol percent of SiO2, 0.1 to 20 mol percent of B2O3, 0.1 to 20 mol percent of Al2O3, 0.1 to 20 mol percent of Li2O, 0.1 to 20 mol percent of Na2O, 0.1 to 20 mol percent of K2O, 0.1 to 20 mol percent of Cs2O, 0.1 to 20 mol percent of MgO, 0.1 to 20 mol percent of CaO, 0.1 to 20 mol percent of SrO, 0.1 to 20 mol percent of BaO and 0.1 to 10 mol percent of La2O3. The iron phosphate glass prepared by the invention is low in alloy corrosivity, simple in preparation process, low in cost and easy to engineer, and has an extremely high application prospect in the field of radioactive nuclear waste glass curing engineering.

Description

technical field [0001] The invention relates to the research and development field of highly radioactive nuclear waste solidified glass, in particular to a radioactive nuclear waste solidified iron phosphate glass with low corrosion to alloys and a preparation method thereof. Background technique [0002] With the development of my country's nuclear industry and the acceleration of the construction of nuclear facilities for various types of radioactive waste, the demand for vitrification of high-level radioactive waste is increasing rapidly. However, in the engineering production of radioactive waste solidified glass, it is necessary to comprehensively consider many important related indicators such as physical, chemical, electrical, thermal, and mechanical properties of solidified glass. Corrosivity to alloys is the chemical property of nuclear waste solidified glass, especially the corrosivity of molten glass to alloys at high temperatures has a major impact on the entire ...

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Problems solved by technology

[0006] However, methods to reduce the aggressiveness of nuclear waste solidified iron phosphate glass to alloys by increasing the photobasicity are rarely reported in the literature.

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