Electrorefining is a key step in pyroprocessing. The solid cathode processing is necessary to separate the salt from the cathode of the electrorefiner since the uranium deposit in a solid cathode contains electrolyte salt. Moreover, it is very important to increase the throughput of the salt separation system due to the high uranium content of the spent nuclear fuel and high salt fraction of uranium dendrites. Therefore, in this study, the effect of deposit on the evaporation of the adhered salt in a uranium deposit was investigated by using the samples of salt in the uranium deposit and salt in the deposit of the surrogate material for the effective separation of the salt. It was found that the salt evaporation rate is dependent on the deposit type and bulk density in the crucible. Additionally, the evaporation rate was found to be lower when the deposit structure is complex; the rate also decreases as the bulk density of the deposit is increased owing to the retardation of the salt vapour transport process. It was concluded that the mass transfer of the salt vapour is an important parameter for the achievement of a high throughput performance in the salt distillation process.

中文翻译：

---

沉积物对铀枝晶中附着盐蒸发速率的影响

电精炼是高温处理的关键步骤。由于固态阴极中的铀沉积物中含有电解质盐，因此必须使用固态阴极处理才能将盐与电精炼机的阴极分离。此外，由于废核燃料中铀的含量高和铀树枝状晶体的盐分高，因此提高盐分离系统的生产能力非常重要。因此，在这项研究中，通过使用铀矿床中的盐和替代材料矿床中的盐样品来有效分离盐，研究了矿床对铀矿床中附着的盐蒸发的影响。发现盐的蒸发速率取决于坩埚中的沉积物类型和堆积密度。另外，当沉积物结构复杂时，蒸发速率较低；由于沉积物的堆积密度增加，由于盐蒸气传输过程的延迟，该速率也降低了。结论是，盐蒸气的传质是在盐蒸馏过程中实现高生产量性能的重要参数。