ENARGITE LEACHING METHOD

To provide a method for leaching enargite, a poorly-soluble mineral, by bioleaching.SOLUTION: Activated carbon is added to a raw material comprising enargite, and bioleaching is performed with iron bacteria. The amount of the added activated carbon is set so that a period for which a redox potential...

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Bibliographische Detailangaben
Hauptverfasser:	NOGUCHI HARUO, KOYAMA KEIJI, NAKAMURA TAKESHI, KUROIWA TATSUHITO, HIRASHIMA TAKESHI, AOKI YUJI, OKIBE NAOKO, TAKAMATSU KYOHEI
Format:	Patent
Sprache:	eng ; jpn
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:	To provide a method for leaching enargite, a poorly-soluble mineral, by bioleaching.SOLUTION: Activated carbon is added to a raw material comprising enargite, and bioleaching is performed with iron bacteria. The amount of the added activated carbon is set so that a period for which a redox potential of a leachate is 650-700 mV with respect to a standard hydrogen electrode is included in the leaching period. By bioleaching, enargite, a poorly-soluble mineral, can be leached out.SELECTED DRAWING: Figure 1 【課題】バイオリーチングにより難溶解性鉱物である硫砒銅鉱を浸出する方法を提供する。【解決手段】硫砒銅鉱を含む原料に活性炭を添加して、鉄酸化細菌によるバイオリーチングを行う。活性炭の添加量を、浸出液の酸化還元電位が標準水素電極に対して６５０〜７００ｍＶとなる期間が浸出期間中に含まれる量とする。バイオリーチングにより難溶解性鉱物である硫砒銅鉱を浸出できる。【選択図】図１