Abstract:A complete process
flowsheet to recover metal values from Sm2Co17-type magnet scrap was investigated. The magnet
scrap was leached in chloride medium at pulp density of 2% (w/v) under
the optimum conditions of 15% (v/v) HCl and 5% (v/v) H2O2 at 70 °C for 3 h, which yielded 98.5% Sm and 99%
Co extractions. The full factorial Design of Experiment technique
was adopted for the optimization of leaching conditions. Sm was selectively
separated from the leach liquor as precipitated double salt using
Na2SO4. The prec… Show more
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