HYDROMETALLURGISKT FOERFARANDE FOER BEHANDLING AV KLORIDER OCHFLUORIDER INNEHAOLLANDE RAOAEMNEN AV VAERDEFULLA METALLER

HYDROMETALLURGISKT FOERFARANDE FOER BEHANDLING AV KLORIDER OCHFLUORIDER INNEHAOLLANDE RAOAEMNEN AV VAERDEFULLA METALLER

The purpose of the method is to remove chlorides and fluorides from a valuable metal raw material by leaching the raw material into sulphuric acid solution and by crystallizing the valuable metal sulphate selectively out of the solution. The valuable metal sulphate crystals are washed in sulphuric a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: POIJAERVI JAAKKO TEIJO ILMARI, FUGLEBERG SIGMUND PEDER
Format: Patent
Sprache:fin
Schlagworte:
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
FERROUS OR NON-FERROUS ALLOYS
INORGANIC CHEMISTRY
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:The purpose of the method is to remove chlorides and fluorides from a valuable metal raw material by leaching the raw material into sulphuric acid solution and by crystallizing the valuable metal sulphate selectively out of the solution. The valuable metal sulphate crystals are washed in sulphuric acid solution, and the recovered dechlorinated and defluorinated crystals are leached into water and conducted into electrolysis. The sulphuric acid solution employed in the raw material leaching and in the crystal washing is preferably the same as the return acid of the electrolysis. Chlorides and fluorides are removed from the mother liquor of crystallization in the bleed.