Objective PREDICTION AND EVALUATION OF ZNS SURFACE CONTAMINATION BY COPPER RELATED OF A BINARY ZNS-CUFES2 COMPOUND. X-RAY INDUCED PHOTOELECTRON SPECTROSCOPY (ESCA OR XPS), AUGER ELECTRON (AES) AND ENERGY LOSS (ELS) SPECTROSCOPIES ARE APPLIED TO SURFACE ANALYSIS OF ZINC SULFIDE LOCATED IN COPPER-RICH ENVIRONMENTS. AMONG SUCCESSIVE PROCESSES OF ORE BENEFICIATION THE STUDY AIMS TO RECOGNIZE THE MORE PROBABLE SOURCE OF ZNS CONTAMINATION BY COPPER-RICH COMPOUNDS LEADING TO ACTIVATION OF SPHALERITE. PARTICULAR ATTENTION WILL BE GIVEN TO COPPER PRESENT AS THE BULK ORE IMPURITY ASSOCIATED WITH ZNS OR AS INCLUSIONS IN SPHALERITE; COPPER ORIGINATING FROM MINERALS SUCH AS CHALCOPRYTE BEING IN CONTRACT OR SUBSTITUTION ZNS WILL BE ALSO EXAMINED. SURFACE COMPOSITION VARIATIONS OCCURRING AS SPECIFIC SURFACE AREAS ARE RELATED TO VARIATIONS OF PHYSICAL AND CHEMICAL PROPERTIES, CHARACTERISTIC OF THE ANALYZED VOLUME. SINGLE CRYSTALS OF ZNS FROM REOCIN (SPAIN) AND SAINT-SALVY (FRANCE) WILL BE SELECTED; ZNS CRYSTALS BELONGING TO A BINARY ZNS - CUFES2 SYSTEM WILL ALSO BE CONSIDERED. CHEMICAL SURFACE ABALYSIS WILL BE CARRIED OUT BY MEANS OF AUGER ELECTRON SPECTROSCOPY. THE MEASUREMENT IS DONE WITH HIGH SPECIAL RESOLUTION, AT THE SURFACE OF FRESHLY FRACTURED AND GROUND SINGLE ZNS MATERIALS, AFTER THE SURFACES REMAINED EXPOSED TO AXQUEOUS COPPER SOLUTIONS (VARIOUS PH, TEMPERATURE, AND COPPER CONCENTRATIONS). RESULTS WILL BE COMPARED TO THE ZNS PHASE OF THE ZNS - CUFES2 BINARY COMPOUNDS. ELECTRON SPECTROSCOPY AND ELECTRON MICROSCOPY WILL BE USED AS AN ANALYTICAL TOOL FOR SURFACE AND BULK ANALYSIS OF ZNS AND CUFES2 MINERALS, IN ORDER TO PREDICT THE BEHAVIOUR OF EACH MINERAL AT EACH STEP OF BENEFICIATION OF THE ZNS PHASE. Programme(s) PRE-RAWMAT 2C - Research and development programme (EEC) in the raw materials sector, 1982-1985 Topic(s) Data not available Call for proposal Data not available Funding Scheme Data not available Coordinator Bureau de Recherches Géologiques et Minières (BRGM) EU contribution No data Address Avenue de Concyr 45060 Orléans France See on map Total cost No data
