Uranium recovery from mine water

Mots clés : Hydrometallurgy;Uranium recovery;Ion exchange;Fluidized bed;Economic analysis
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Texte
Sommaire: Process specifications for classification system design for closed circuit grinding are identified. A computer-assisted, mass balance procedure for estimation of material size distributions and required hydrocyclone separation performance is presented.
Publication: CIM Bulletin
Auteur(s): R.E. MclVOR
Mots clés: Mineral processing, Material balance, Grinding circuit, Hydrocyclones, Classifiers
Numéro: 872
Volume: 77
Année: 1984
Texte
Sommaire: The effectiveness of two thio compounds for copper sulphide depression in molybdenite flotation has been examined with batch bench scale tests.
Both thioglycollate and trithiocarbonate proved to be good depressants producing results similar to those for cyanide and hydrosulphide. Ferrocyanide was ineffective on the sample material tested.
The depressing effect of thioglycollate was readily reversed by an addition of xanthate.
Publication: CIM Bulletin
Auteur(s): GORDON E. AGAR
Mots clés: Mineral processing, Flotation, Copper sulphides, Sodium cyanide, Ferrocyanide, Sodium hydrosulphide
Numéro: 872
Volume: 77
Année: 1984
Texte
Sommaire: Concentrate dewatering operations have a significant influence on the economics of base metal beneficiation. The expenditures for energy and labour per tonne of product are high. The relatively low efficiencies of standard techniques present inducements for process modifications. Development efforts at several Noranda concentrators led to process changes which improved productivity, namely, agitated pulp storage in large vessels, process automation and pressure filtration.
Publication: CIM Bulletin
Auteur(s): K.V. KONIGSMANN
Mots clés: Mineral processing, Dewatering, Pulp storage, Flotation, Pressure filter, Concentrates, Automation
Numéro: 872
Volume: 77
Année: 1984
Texte
Sommaire: Canadian income tax legislation contains a number of provisions which serve to facilitate the structuring of business arrangements, including mineral resource ventures. These rules are often fairly complex and not easily understood. This article attempts to explain in plain and understandable language the mechanics and benefits of one of the more frequently encountered provisions, the 'Section 85 election".
Publication: CIM Bulletin
Auteur(s): ROBERT B. PARSONS
Numéro: 872
Volume: 77
Année: 1984
Texte
Sommaire: The principal objective of this study was to verify a certain number of mineralogical hypothesis which could explain the important variations observed in the performances of the B grinding and flotation circuit of the No. 1 concentrator at Mines Gaspe. Six series of samples obtained from a sampling campaign performed in the summer of 1980 have been studied. The capacity of the grinding circuit seems mainly influenced by the variations of the mineralogical and textural properties of the ore....
Publication: CIM Bulletin
Auteur(s): M.A. BÉRUBÉ
Mots clés: Flotation process, Grinding, Copper carbonates, Copper sulphides, Mineral liberation
Numéro: 872
Volume: 77
Année: 1984
Texte
Sommaire: In kraft pulp mills, the spent pulping liquor is concentrated and used as fuel in the recovery boiler. Extensive deposits are formed in the upper section of the boiler due to the very high ash content of the fuel and the volatile nature of the ash. Deposits are composed of Na2SO4, Na2CO3, NaCl, some potassium salts and reduced sulphur compounds. Chloride and potassium salts are enriched in the deposits compared to the smelt due to their greater volatility.
Severe corrosion of the superheater...
Publication: CIM Bulletin
Auteur(s): HOC NGHIA, DOUGLAS W. REEVE, DAVID BARHAM
Mots clés: Corrosion, Fireside deposits, Recovery boilers, Kraft pulp mills, Chloride, Potassium
Numéro: 872
Volume: 77
Année: 1984
Texte
Sommaire: Rocks of the Whitewater Group (Aphebian age) occur within the Sudbury Basin and consist of three formations which are, from oldest to youngest: Onaping, heterolithic breccias /lus an igneous-textured component; Onwatin, argillite and silt-stone; and Chelmsford, greywacke with minor argillite with silts tone. Mineralization in these rocks is as follows:1) Sulphides are disseminated throughout the Onaping Formation. Pyrrhotite, the major sulphide mineral, occurs mainly as fragments; other...
Publication: CIM Bulletin
Auteur(s): D.H. ROUSELL
Mots clés: Mineral exploration, Sudbury Basin, Sulphide deposits, Pyrrhotite fragments, Sedimentary exhalative deposits, Quartz veins, Base metals, Anthraxolite, Meteorite impact
Numéro: 872
Volume: 77
Année: 1984
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