Crystallization apparatus for metal stripping.

摘要

A crystallization apparatus for metal tripping of an inverted frustocone type structure is disclosed, which comprises a zone of mixing and contacting an organic solvent containing extracted metal ions therein with a fluoride series stripping solution to separate (back-extract) the metal ions as a crystal of metal fluoride or fluorinated metal complex into the stripping solution, a zone of cooling the stripping solution containing the deposited crystal of fluoride or metal complex therein to perform crystal growth, and a zone of separating the grown crystal. In this apparatus, the colling zone is arranged in a lower part of the apparatus and provided at its outside with a heat exchanger, and a downpipe extending downward from the mixing zone is terminated above the cooling zone, and a forced circulation zone for generating cyclonic stream of the stripping solution is disposed in the lowest portion of the cooling zone and provided with at least one blow-off nozzle located in a substantially tangential direction thereof.