ARSENIC REMOVAL FROM MINERALS

ARSENIC REMOVAL FROM MINERALS

The invention relates to a method and an arrangement for removing arsenic from pyrite-free minerals, such as cole- manite and howlite. The method comprises roasting the pyrite-free material at a temperature of less than 900°C in reducing conditions. The method is typically performed in a fluidized b...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SCHNEIDER, Günter, GÜNTNER, Jochen, ANASTASIJEVIC, Nikola
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMISTRY
COMPOUNDS THEREOF
FERROUS OR NON-FERROUS ALLOYS
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:The invention relates to a method and an arrangement for removing arsenic from pyrite-free minerals, such as cole- manite and howlite. The method comprises roasting the pyrite-free material at a temperature of less than 900°C in reducing conditions. The method is typically performed in a fluidized bed reactor by using a reducing gas, such as hydrogen, as the fluidization gas.