PROCESSO PARA TRATAMENTO DE RESIDUOS DE LIXIVIACAO DE MINERIOS DE ZINCO

Zinc ore leaching residues are treated, to recover lead and precious metals such as silver, with sulphuric acid at a concn. of 120-200 g/l and 95 degrees C for 4-8 hrs. to obt. a final acidity of 110-120g/l, and the remaining solid is removed and washed, suspended as a pulp in water at pH 1-5 and a...

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Bibliographische Detailangaben
1. Verfasser:	BODSON F
Format:	Patent
Sprache:	por
Schlagworte:	CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F DIFFERENTIAL SEDIMENTATION FERROUS OR NON-FERROUS ALLOYS FLOTATION INORGANIC CHEMISTRY MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS METALLURGY PERFORMING OPERATIONS PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Zusammenfassung:	Zinc ore leaching residues are treated, to recover lead and precious metals such as silver, with sulphuric acid at a concn. of 120-200 g/l and 95 degrees C for 4-8 hrs. to obt. a final acidity of 110-120g/l, and the remaining solid is removed and washed, suspended as a pulp in water at pH 1-5 and a collector of sulphides and a non-ionic org. collector are added. The pulp is then flotated to separate a concentrate contg. sulphides, silver and lead sulphate. Process avoids production of iron jarosites in the pulp prior to removal of the by-prods.).