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    • 7. 发明申请
    • Low-temperature solidification of radioactive and hazardous wastes
    • 放射性和危险废物的低温固化
    • US20060211908A1
    • 2006-09-21
    • US11364643
    • 2006-02-28
    • Weiliang GongWerner LutzeIan Pegg
    • Weiliang GongWerner LutzeIan Pegg
    • G21F9/00G21F9/16
    • G21F9/304C04B28/006C04B28/008C04B28/08G21F9/16Y02P40/165Y02W30/91Y02W30/92Y02W30/94C04B18/0463C04B18/08C04B22/062C04B14/106C04B18/146
    • Treatment of a radioactive waste stream is provided by adding sodium hydroxide (NaOH) and/or potassium hydroxide (KOH) together with a rapidly dissolving form of silica, e.g., fumed silica or fly ash. Alternatively, the fumed silica can be first dissolved in a NaOH/KOH solution, which is then combined with the waste solution. Adding a binder that can be a mixture of metakaolin (Al2O3.2SiO2), ground blast furnace slag, fly ash, or other additives. Adding an “enhancer” that can be composed of a group of additives that are used to further enhance the immobilization of heavy metals and key radionuclides such as 99Tc and 129I. An additional step can involve simple mixing of the binder with the activator and enhancer, which can occur in the final waste form container, or in a mixing vessel prior to pumping into the final waste form container, depending on the particular application.
    • 通过将氢氧化钠(NaOH)和/或氢氧化钾(KOH)与快速溶解形式的二氧化硅(例如热解法二氧化硅或飞灰)一起加入来提供放射性废物流的处理。 或者,可以将热解法二氧化硅溶解在NaOH / KOH溶液中,然后将其与废溶液组合。 加入可以是偏高岭土(Al 2 O 3 O 3·2SSi 2/2)的混合物的粘合剂,高炉炉渣,粉煤灰或 其他添加剂。 添加可以由一组添加剂组成的“增强剂”,其用于进一步增强重金属和关键放射性核素如99和99 I的固定化。 根据具体应用,另外的步骤可以包括将粘合剂与活化剂和增强剂简单混合,活化剂和增强剂可以在最终废物形式的容器中发生,或者在泵入最终废物形式的容器之前在混合容器中。