Settling of metallic molybdenum particles from a molten fluoride salt to a liquid metal

摘要

The pyrochemical reprocessing of nuclear waste comprises a step of extraction by a liquid metal of noble metals and other easily reducible species, as emtalic elements, from a molten fluoride salt. The distribution behaviour of metallic molybdenum particles was studied in the two-phase systems made of a molten salt (LiF-CaF_2) and a liquid metal (Bi, Pb, Sb, Sn, Zn). The first experiments, conducted under argon, led to a recovery of molybdenum in the liquid metal that depends on the latter: from 20 wt