Acid preinjection to decrease instantaneous acid consumption in in-situ mining

This invention pertains to a method for in-situ mining of copper values from ore formations and, more particularly, this invention pertains to oxidative in-situ mining of copper wherein, for example, an oxygen-acid, a ferric iron-acid or a nitrate-acid lixiviant is being employed for recovering copp...

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Bibliographische Detailangaben
Hauptverfasser:	HSUEH, LIMIN, CATHLES, III, LAWRENCE MACLAGAN, LINGANE, PETER JAMES
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FERROUS OR NON-FERROUS ALLOYS FIXED CONSTRUCTIONS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	This invention pertains to a method for in-situ mining of copper values from ore formations and, more particularly, this invention pertains to oxidative in-situ mining of copper wherein, for example, an oxygen-acid, a ferric iron-acid or a nitrate-acid lixiviant is being employed for recovering copper values. Further, this invention pertains to the recovery of copper from a deposit in which the ratio of pyrite to chalcopyrite is low. Still further, this invention pertains to a combination of acid-preinjection, monitoring, acid adjustment and additional monitoring or tell-tale ion monitoring for acid supply increase or decrease in the ore formation as steps in a combination for rendering highly controllable the acid preinjection process, thus providing further improvements to in-situ mining processes.