METHOD FOR THE RECOVERY OF METALS USING CHLORIDE LEACHING AND EXTRACTION

The invention relates to a method for the recovery of metals, in particular copper, from a copper-bearing raw material, whereby the material is leached into a chloride-containing solution. The leaching of the raw material is performed oxidatively and at a sufficiently high redox potential that the c...

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1. Verfasser: STIG-ERIK HULTHOM
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description The invention relates to a method for the recovery of metals, in particular copper, from a copper-bearing raw material, whereby the material is leached into a chloride-containing solution. The leaching of the raw material is performed oxidatively and at a sufficiently high redox potential that the copper in the copper chloride solution from leaching is mainly divalent, The chloride solution obtained, which contains copper and potentially other valuable metals, is fed to liquid-liquid extraction. In the extraction the copper is first transferred to the organic phase with extraction and then to a sulphate solution in stripping, which is fed to copper electrowinning. La invencion se refiere a un metodo para la recuperacion de metales, en particular cobre, a partir de una materia prima que contiene cobre, por medio del cual el material es lixiviado en una solucion que contiene cloruro. La lixiviacion de la materia prima es realizada en forma oxidativa y aun potencial redox suficientemente elevado que el cobre que se encuentra en la solucion de cloruro procedente de la lixiviacion es principalmente divalente. La solucion de cloruro obtenida, la cual contiene cobre y potencialmente otros metales valiosos, es alimentada a una extraccion liquido-liquido. En la extraccion el cobre es primero transferido a la fase organica con extraccion y posteriormente a una solucion de sulfato en la desorcion, la cual se alimenta a la extraccion de cobre por via electrolitica.
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The leaching of the raw material is performed oxidatively and at a sufficiently high redox potential that the copper in the copper chloride solution from leaching is mainly divalent, The chloride solution obtained, which contains copper and potentially other valuable metals, is fed to liquid-liquid extraction. In the extraction the copper is first transferred to the organic phase with extraction and then to a sulphate solution in stripping, which is fed to copper electrowinning. La invencion se refiere a un metodo para la recuperacion de metales, en particular cobre, a partir de una materia prima que contiene cobre, por medio del cual el material es lixiviado en una solucion que contiene cloruro. La lixiviacion de la materia prima es realizada en forma oxidativa y aun potencial redox suficientemente elevado que el cobre que se encuentra en la solucion de cloruro procedente de la lixiviacion es principalmente divalente. 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subjects CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
title METHOD FOR THE RECOVERY OF METALS USING CHLORIDE LEACHING AND EXTRACTION
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