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Method for solidifying fused salt waste by hydrothermally synthesizing pollucite
The invention discloses a method for hydrothermally synthesizing pollucite solidified molten salt waste, which comprises the following steps: S1, heating kaolin to obtain metakaolin, and filtering the metakaolin through a screen to obtain metakaolin powder; s2, mixing sodium hydroxide, metakaolin powder and molten salt waste with deionized water, and uniformly stirring to obtain a pasty mixture; s3, putting the pasty mixture into a drying oven for aging treatment; and S4, pressurizing and heating the aged mixture to enable water in the mixture to be in a supercritical state, keeping for a set time, and then carrying out solid-liquid separation to obtain a fused salt waste solidified body. According to the method, water is in a supercritical state, so that the treatment time of hydrothermal synthesis can be greatly shortened; the prepared fused salt waste solidified body can stably solidify a large amount of cesium, the migration ability and diffusion performance of radioactive cesium are effectively reduced, and pollution of radioactive cesium to the environment is effectively reduced. The method disclosed by the invention has relatively high use value and development potential.
本申请公开了一种水热合成铯榴石固化熔盐废物的方法，包括以下步骤：S1、将高岭土加热得到偏高岭土，将偏高岭土经过筛网过滤后得到偏高岭土粉末；S2、将氢氧化钠、偏高岭土粉末以及熔盐废物与去离子水混合，搅拌均匀后得到浆糊状的混合物；S3、将浆糊状的混合物放入烘箱中进行老化处理；S4、加压加热经老化处理后的混合物，使混合物中的水处于超临界状态，保持设定时间，然后固液分离后得到熔盐废物固化体。本申请通过使水处于超临界状态，能够大大降低水热合成的处理时间；所制备的熔盐废物固化体能够将铯元素大量稳定固化，有效降低放射性铯的迁移能力和扩散性能，有效减少其对环境的污染。本发明的方法具有较高的使用价值和发展潜力。
Method for solidifying fused salt waste by hydrothermally synthesizing pollucite
The invention discloses a method for hydrothermally synthesizing pollucite solidified molten salt waste, which comprises the following steps: S1, heating kaolin to obtain metakaolin, and filtering the metakaolin through a screen to obtain metakaolin powder; s2, mixing sodium hydroxide, metakaolin powder and molten salt waste with deionized water, and uniformly stirring to obtain a pasty mixture; s3, putting the pasty mixture into a drying oven for aging treatment; and S4, pressurizing and heating the aged mixture to enable water in the mixture to be in a supercritical state, keeping for a set time, and then carrying out solid-liquid separation to obtain a fused salt waste solidified body. According to the method, water is in a supercritical state, so that the treatment time of hydrothermal synthesis can be greatly shortened; the prepared fused salt waste solidified body can stably solidify a large amount of cesium, the migration ability and diffusion performance of radioactive cesium are effectively reduced, and pollution of radioactive cesium to the environment is effectively reduced. The method disclosed by the invention has relatively high use value and development potential.
本申请公开了一种水热合成铯榴石固化熔盐废物的方法，包括以下步骤：S1、将高岭土加热得到偏高岭土，将偏高岭土经过筛网过滤后得到偏高岭土粉末；S2、将氢氧化钠、偏高岭土粉末以及熔盐废物与去离子水混合，搅拌均匀后得到浆糊状的混合物；S3、将浆糊状的混合物放入烘箱中进行老化处理；S4、加压加热经老化处理后的混合物，使混合物中的水处于超临界状态，保持设定时间，然后固液分离后得到熔盐废物固化体。本申请通过使水处于超临界状态，能够大大降低水热合成的处理时间；所制备的熔盐废物固化体能够将铯元素大量稳定固化，有效降低放射性铯的迁移能力和扩散性能，有效减少其对环境的污染。本发明的方法具有较高的使用价值和发展潜力。
Method for solidifying fused salt waste by hydrothermally synthesizing pollucite
一种水热合成铯榴石固化熔盐废物的方法
SHU XIAOYAN (author) / LU XIRUI (author) / ZHANG SHENGDONG (author) / LIU YI (author) / RAN MAOBIAO (author)
2024-06-14
Patent
Electronic Resource
Chinese
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