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In this project, the ore of the project of expansion of Draa Sfar mine is studied. The deposit is a Cu-Pb-Zn polymetallic Volcanogenic Massive Sulphide. The project extension contains three main ore-types: the polymetallic mineralisation from -1200 m to -1300 m, the polymetallic mineralisation from -1300 m to -1500 m and a copper-rich polymetallic ore. Targeted minerals are galena for lead, chalcopyrite for copper and sphalerite for zinc. The ores of the extension are first studied to determine its quantitative mineralogy. The ores of the deposit extension are compared to the ore that is presently exploited in Draa Sfar. Then, in a second stage, their behaviour is estimated in a laboratory flowsheet similar to the one of the the flotation plant used to process the ore currently extracted from Draa Sfar mine called reference ore. The flowsheet comprises multiple grinding stages in between a lead, a copper and finally a zinc flotation circuits. To fulfil both objectives, the three ores of the extension project and the present ore are sampled and analysed. Then, they are floated in laboratory tests and their products are analysed on bulk and sized samples, SEM is also used. A sampling of the plant is also conducted, but on a too short period to provide reliable results.
Ores of the extension project appear poorer in lead and zinc than reference ore, they are also richer in copper. In the lower part of the deposit, -1200 m, the liberation degree of galena is decreasing and the one of chalcopyrite increasing compared to the reference ore. These characteristics of the future feed of the plant suggest to modify the flowsheet to a copper flotation followed by lead and zinc flotations. At laboratory scale, the reference ore produces lead, copper and zinc concentrates with higher recoveries than in the ores of the extension project. In the lead, copper and zinc circuit, the concentrates are diluted by an entrainment of sulphide and silicate gangue pointing to a lack of selectivity of the three flotation circuits. In the lead circuit, the low recoveries in the concentrates of the ores of the extension project compared to reference ore can be related to a lack of liberation of galena leading to losses to the middling streams of the copper circuit. In the copper concentrate, copper grade is higher in ores from the extension thanks to the coarser liberation of chalcopyrite in the reference.

Cu-Pb-Zn polymetallic ores, quantitative mineralogy, process mineralogy, geometallurgy, flotation, laboratory test, laboratory scale, plant scale, sampling, masse balance, size by size study, SEM, liberation degree, mineral associations, sulphide gangue --- Ingénierie, informatique & technologie > Géologie, ingénierie du pétrole & des mines

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Communicable diseases --- Diagnosis. --- Communicable Diseases --- Clinical Laboratory Techniques --- diagnosis --- pathology --- Clinical Laboratory Diagnoses --- Clinical Laboratory Testings --- Clinical Laboratory Tests --- Diagnoses and Laboratory Examinations --- Diagnosis, Laboratory --- Laboratory Diagnosis --- Laboratory Examinations and Diagnoses --- Laboratory Techniques, Clinical --- Clinical Laboratory Technique --- Clinical Laboratory Test --- Clinical Laboratory Testing --- Diagnose, Clinical Laboratory --- Laboratory Diagnoses --- Laboratory Technique, Clinical --- Laboratory Test, Clinical --- Laboratory Testing, Clinical --- Technique, Clinical Laboratory --- Test, Clinical Laboratory --- Testing, Clinical Laboratory --- Laboratories --- Medical Laboratory Science --- Clinical Laboratory Services --- Clinical Laboratory Techniques. --- diagnosis. --- pathology.

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De (bio)medische wetenschappen kennen een snelle vooruitgang. En precies die evolutie zorgt ervoor dat er steeds meer laboratoriumonderzoeken beschikbaar zijn om aandoeningen vast te stellen of op te volgen.Uit het ruime aanbod van medische analyses een geschikte test selecteren is voor artsen geen sinecure. Bovendien is het niet eenvoudig om de testresultaten op een juiste manier te interpreteren. Het veronderstelt een goed inzicht in de indicaties, de normaalwaarden, de interferenties en de klinische waarde van een labo-analyse. Wegwijs in laboratoriumdiagnose wil de arts (in opleiding), de omnipracticus en de specialist daarbij ondersteunen. Het boek biedt hen een helder overzicht en de nodige basiskennis voor het oordeelkundig gebruik van laboratoriumtests.Dit boek is een volledig herwerkte uitgave van een eerdere editie (Garant, 2001). Tal van hoofdstukken werden geactualiseerd en nieuwe hoofdstukken werden toegevoegd. Aan dit boek werkten 65 Nederlandse en Belgische specialisten mee. Hun bijdrage garandeert de brede bruikbaarheid en de wetenschappelijke kwaliteit van deze publicatie.

Semiology. Diagnosis. Symptomatology --- Academic collection --- Clinical Laboratory Techniques --- Diagnoses and Laboratory Examinations --- Diagnosis, Laboratory --- Laboratory Diagnosis --- Laboratory Examinations and Diagnoses --- Laboratory Techniques, Clinical --- Clinical Laboratory Technique --- Diagnoses, Laboratory --- Laboratory Diagnoses --- Laboratory Technique, Clinical --- Technique, Clinical Laboratory --- Techniques, Clinical Laboratory --- Laboratories --- Medical Laboratory Science --- Clinical Laboratory Services --- Laboratoria --- Onderzoek --- Tests (geneeskunde) --- Diagnostiek , Laboratoriumonderzoek --- laboratoriumdiagnostiek --- klinische biologie --- laboratoriumtechnieken --- Diagnostiek , Laboratoriumonderzoek. --- Diagnostiek --- Laboratoriumonderzoek ; geneeskunde --- 605.12 --- onderzoek --- diagnostiek --- Clinical Laboratory Diagnoses --- Clinical Laboratory Testings --- Clinical Laboratory Tests --- Clinical Laboratory Test --- Clinical Laboratory Testing --- Diagnose, Clinical Laboratory --- Laboratory Test, Clinical --- Laboratory Testing, Clinical --- Test, Clinical Laboratory --- Testing, Clinical Laboratory --- Clinical Laboratory Techniques. --- Diagnostiek, Laboratoriumonderzoek. --- Laboratorium --- Test (geneeskunde) --- Ontwikkeling --- Leerlijn --- Onderzoek (geneeskunde)

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Clinical Laboratory Techniques --- Diagnosis, Laboratory --- Diagnostics biologiques --- Periodicals --- Périodiques --- Clinical Laboratory Techniques. --- Diagnosis, Laboratory. --- Africa. --- Africa --- laboratory-based epidemiology --- public health --- Africa --- laboratory medicine --- Sabinet African ePublications (SA ePublications) --- Clinical pathology --- Diagnostic laboratory tests --- Laboratory diagnosis --- Laboratory medicine --- Medical laboratory diagnosis --- Diagnosis --- Pathology --- Clinical Laboratory Diagnoses --- Clinical Laboratory Testings --- Clinical Laboratory Tests --- Diagnoses and Laboratory Examinations --- Laboratory Diagnosis --- Laboratory Examinations and Diagnoses --- Laboratory Techniques, Clinical --- Clinical Laboratory Technique --- Clinical Laboratory Test --- Clinical Laboratory Testing --- Diagnose, Clinical Laboratory --- Laboratory Diagnoses --- Laboratory Technique, Clinical --- Laboratory Test, Clinical --- Laboratory Testing, Clinical --- Technique, Clinical Laboratory --- Test, Clinical Laboratory --- Testing, Clinical Laboratory --- Laboratories --- Medical Laboratory Science --- Clinical Laboratory Services --- Clinical medicine --- Eastern Hemisphere --- Human medicine --- africa