Glass solidified body and preparation method thereof
A vitrification, mass percentage technology, applied in the direction of radioactive purification, nuclear engineering, etc., can solve the problems of high melting temperature, unfavorable industrialization, etc., and achieve the effect of low melting temperature, simple process, and easy control of the production process
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Embodiment 1
[0020] Analytical pure SiO after drying 2 74%, Al 2 o 3 15%, B 2 o 3 10%, CeO 2 1% is used as simulated radionuclide, and the raw materials are accurately weighed according to the ratio. After the raw materials are ground and mixed evenly by a ball mill, they are poured into a crucible, and then the crucible is placed in a lifting furnace, and the temperature is raised to 1400°C at a speed of 10°C / min, and kept for 3 hours, and then the glass liquid is poured into a copper mold preheated at 300°C , followed by annealing at 700°C for 2h to eliminate the internal stress of the glass, and finally cooling to room temperature at an average speed of 2°C / min. The obtained vitrified solidified body was analyzed according to the PCT method in the ASTM standard for anti-leaching performance, and the measured standardized leaching rate of 28d Ce element was 3.6×10 -5 g·m -2 d -1 .
Embodiment 2
[0022] Analytical pure SiO after drying 2 71.5%, Al 2 o 3 14%, B 2 o 3 9.5%, CeO 2 5% is simulated radionuclide, and the raw materials are accurately weighed according to the ratio. After the raw materials are ground and mixed evenly by a ball mill, they are poured into a crucible, and then the crucible is placed in a lifting furnace, and the temperature is raised to 1400°C at a speed of 10°C / min, and the temperature is kept for 3.5h, and then the glass liquid is poured into a copper mold preheated at 300°C , followed by annealing at 700°C for 2h to eliminate the internal stress of the glass, and finally cooled to room temperature at an average speed of 2°C / min. The obtained vitrified body was analyzed according to the PCT method in the ASTM standard for anti-leaching performance, and the measured standardized leaching rate of 28d Ce element was 6.6×10 -6 g·m -2 d -1 .
Embodiment 3
[0024] Analytical pure SiO after drying 2 70%, Al 2 o 3 14%, B 2 o 3 9%, CeO 2 7% is simulated radionuclide, and the raw materials are accurately weighed according to the ratio. After the raw materials are ground and mixed evenly by a ball mill, they are poured into a crucible, and then the crucible is placed in a lifting furnace, and the temperature is raised to 1350°C at a speed of 10°C / min, and kept for 3 hours, and then the glass liquid is poured into a copper mold preheated at 300°C , followed by annealing at 700°C for 2h to eliminate the internal stress of the glass, and finally cooling to room temperature at an average speed of 2°C / min. The obtained vitrified body was analyzed according to the PCT method in the ASTM standard for anti-leaching performance, and the measured standardized leaching rate of 28d Ce element was 8.9×10 -6 g·m -2 d -1 .
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