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Method for multiple curing of nuclear waste by geopolymer
The invention relates to the technical field of radioactive dangerous waste treatment, in particular to a method for multiple curing of nuclear waste through geopolymers. Comprising the following steps: S1, mixing metakaolin, nuclear waste, a magnesium additive and an alkali activator, jointly grinding to obtain primary mixed slurry, and curing the primary mixed slurry until the primary mixed slurry is hardened to obtain a pre-cured body; s2, crushing the pre-cured body to a certain particle size, and calcining to obtain a calcined material; s3, mixing the calcined material with metakaolin, a magnesium additive and an alkali activator, grinding again to obtain secondary mixed slurry, and curing the secondary mixed slurry until the secondary mixed slurry is hardened to obtain a final cured body for curing the nuclear waste. And the solidified body is used for safe landfill. According to the method, the structure in-situ transformation of the geopolymer in the heat treatment process can be regulated in a targeted manner, and the curing effect of radionuclides is enhanced.
本发明涉及放射性危废料处理技术领域，尤其涉及一种地质聚合物多重固化核废料的方法。包括S1.将偏高岭土、核废料、镁添加剂以及碱激发剂混合，共同研磨得到一次混合浆料，将一次混合浆料养护至硬化，得到前固化体；S2.前固化体破碎至一定粒度后，进行煅烧，得到煅烧物料；S3.将煅烧物料与偏高岭土、镁添加剂以及碱激发剂混合，再次研磨得到二次混合浆料，将所述二次混合浆料养护至硬化，得到固化核废料的终固化体。固化体用于安全填埋。本发明方法能够针对性地调控地质聚合物在热处理过程的结构原位转变，增强放射性核素的固化效果。
Method for multiple curing of nuclear waste by geopolymer
The invention relates to the technical field of radioactive dangerous waste treatment, in particular to a method for multiple curing of nuclear waste through geopolymers. Comprising the following steps: S1, mixing metakaolin, nuclear waste, a magnesium additive and an alkali activator, jointly grinding to obtain primary mixed slurry, and curing the primary mixed slurry until the primary mixed slurry is hardened to obtain a pre-cured body; s2, crushing the pre-cured body to a certain particle size, and calcining to obtain a calcined material; s3, mixing the calcined material with metakaolin, a magnesium additive and an alkali activator, grinding again to obtain secondary mixed slurry, and curing the secondary mixed slurry until the secondary mixed slurry is hardened to obtain a final cured body for curing the nuclear waste. And the solidified body is used for safe landfill. According to the method, the structure in-situ transformation of the geopolymer in the heat treatment process can be regulated in a targeted manner, and the curing effect of radionuclides is enhanced.
本发明涉及放射性危废料处理技术领域，尤其涉及一种地质聚合物多重固化核废料的方法。包括S1.将偏高岭土、核废料、镁添加剂以及碱激发剂混合，共同研磨得到一次混合浆料，将一次混合浆料养护至硬化，得到前固化体；S2.前固化体破碎至一定粒度后，进行煅烧，得到煅烧物料；S3.将煅烧物料与偏高岭土、镁添加剂以及碱激发剂混合，再次研磨得到二次混合浆料，将所述二次混合浆料养护至硬化，得到固化核废料的终固化体。固化体用于安全填埋。本发明方法能够针对性地调控地质聚合物在热处理过程的结构原位转变，增强放射性核素的固化效果。
Method for multiple curing of nuclear waste by geopolymer
一种地质聚合物多重固化核废料的方法
TIAN QUANZHI (author) / ZHANG HAIJUN (author) / WANG HAINAN (author) / PAN YINHAI (author) / YAO SHUO (author) / IDO (author)
2023-07-04
Patent
Electronic Resource
Chinese
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