METHOD FOR REDUCING IMPURITY IN METAL

PROBLEM TO BE SOLVED: To provide a method for obtaining high-purity indium from an indium raw material containing impurities by a simple operation at a low cost. SOLUTION: The high-purity indium can be obtained by melting the indium raw material, stirring and oxidizing the resultant molten material...

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Bibliographische Detailangaben
Hauptverfasser:	DOI TETSUO, SUGANO MANABU
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for obtaining high-purity indium from an indium raw material containing impurities by a simple operation at a low cost. SOLUTION: The high-purity indium can be obtained by melting the indium raw material, stirring and oxidizing the resultant molten material in the air to form dross, allowing the dross to include impurities, and then separating the dross. Further, alkali flux treatment and water washing treatment are applied to the dross to recover crude indium, and the crude indium is repeatedly used to improve yield. COPYRIGHT: (C)2005,JPO&NCIPI