Hydrometallurgy ’94 : Papers Presented at the International Symposium ‘Hydrometallurgy ’94’ Organized by the Institution of Mining and Metallurgy and the Society of Chemical Industry, and Held in Cambridge, England, From 11 to 15 July, 1994

__Hydrometallurgy '94__ contains the 78 papers that were presented at the international symposium organized by the Institution of Mining and Metallurgy and the Society of Chemical Industry and held in Cambridge, England, in July 1994. In the papers specific attention is paid to the concept of sustainable development and the associated ideas of cleaner technology, recycling and waste minimization that have particular relevance to the extractiona nd processing of metals and other mineral products. The papers, by authors from 30 contries, are grouped under the headings: Hydrometallurgy and Sustainable Development; Materials Production and the Environment; Fundamentals; Leaching; Bioprocessing; Gold Solution Purification; Effluent Treatment; Processes; and Recycling. Front Matter....Pages i-xxviii Front Matter....Pages 1-1 EU R&D activity and strategy for sustainable development in the mineral industries....Pages 3-11 Hydrometallurgy—an environmentally sustainable technology?....Pages 13-26 Environmental impact of increasing production of gold from hydrothermal resources....Pages 27-42 In-situ leaching recovery of copper: what’s next?....Pages 43-67 Hydrometallurgical processing of refinery slimes at Phelps Dodge: theory to practice....Pages 69-105 Materials production and the environment....Pages 107-121 Front Matter....Pages 123-123 Reaction of galena in ferric sulphate—sulphuric acid media....Pages 125-138 Multicomponent equilibrium calculations in process design: study of some acid digester reactors....Pages 139-157 Hematite solubility in sulphate process solutions....Pages 159-175 Hydrothermal precipitation from aqueous solutions containing iron(III), arsenate and sulphate....Pages 177-190 Front Matter....Pages 191-191 Heap leaching of poor nickel laterites by sulphuric acid at ambient temperature....Pages 193-208 Mechano-chemical treatment of tetrahedrite as a new non-polluting method of metals recovery....Pages 209-218 Non-traditional methods of treating high-silicon ores containing rare elements....Pages 219-228 Scope and limitations for application of selectivity in oxidation potential-controlled leaching of metal sulphides....Pages 229-252 Control of arsenic and selenium during nickel matte leaching....Pages 253-272 Electrochemical study of oxidative dissolution of synthetic violarite in aqueous media....Pages 273-287 Front Matter....Pages 289-289 Stability of arsenical bacterial oxidation products....Pages 291-311 Removal of iron from kaolin and quartz: dissolution with organic acids....Pages 313-323 Bioreduction of gold on algae and with amino acids....Pages 325-335 Metal speciation in bioleach solutions during bacterial dissolution of a complex mineral sulphide concentrate....Pages 337-350 Front Matter....Pages 289-289 Bacterial oxidation of an auriferous arsenical concentrate....Pages 351-359 Oxidation of arsenopyrite in bacterial ferric solutions....Pages 361-367 Effect of silver and bismuth on bioleaching of copper sulphide concentrates with thermophilic microorganisms....Pages 369-383 Dissolved iron equilibrium in bacterial leaching systems....Pages 385-393 Influence of substrate polarization on activity of Thiobacillus ferrooxidans in bioleaching....Pages 395-405 Front Matter....Pages 407-407 Pretreatment by electrolytic or oxidative leaching for recovery of gold and silver from refractory sulphide concentrates....Pages 409-423 Iodide—thiocyanate leaching system for gold....Pages 425-440 Leaching and recovery of gold by use of acido-thioureation on copper-mine wastes: laboratory and pilot-plant tests and process modelling....Pages 441-461 PRISMA—a hydrometallurgical process simulator: application in gold extraction from refractory pyrites....Pages 463-482 Interrelationship between lixiviants and galvanic interaction during dissolution of gold....Pages 483-499 Comparative performance of porous adsorbents in presence of gold cyanide, organic foulants and solid fines....Pages 501-515 Reductive sorption methods for extraction of noble metals from solution....Pages 517-526 Dissolution of gold in oxidized bromide solutions....Pages 527-540 Leaching of gold from sulphide concentrates with thiosulphate/polysulphide produced by disproportionation of elemental sulphur in ammoniacal media....Pages 541-546 Adsorption of gold-thiourea complex on Greek lignite....Pages 547-559 Front Matter....Pages 561-561 Norzink removal of cobalt from zinc sulphate electrolytes....Pages 563-577 Cementation of mercury(II) from chloroalkali effluents by use of Zn and Fe....Pages 579-590 Removal of antimony and bismuth from copper tankhouse electrolytes....Pages 591-600 Novel solvent extraction reagents for recovery of zinc from sulphate leach solutions....Pages 601-611 Recovery of acids and bases used in metal treatment processes by diffusion dialysis....Pages 613-626 Front Matter....Pages 561-561 Recommended separation processes for ion-absorbed rare earth minerals....Pages 627-634 Purification of waste waters containing heavy metals; by surfactant liquid membrane extraction....Pages 635-654 Electroassisted separation of metals by solvent extraction and supported-liquid membranes....Pages 655-673 Equilibrium and kinetic studies of copper extraction from chloride solutions with pyridine carboxylates....Pages 675-682 Cadmium removal from phosphoric acid—Israeli experience....Pages 683-699 Solvent extraction of rhodium with Kelex 100....Pages 701-707 Front Matter....Pages 709-709 Removal of free cyanide from solution with silver-impregnated activated carbon....Pages 711-723 Removal of heavy metal ions from liquid effluents by solvent-impregnated resins....Pages 725-739 Use of a fluidized-bed ion-exchange system for heavy metals removal from waste streams....Pages 741-753 Application of ultrafiltration assisted by complexation to treatment of industrial waste waters....Pages 755-765 Application of Strong Magnetic Fields For Heavy Metal Removal....Pages 767-775 Design And Construction Aspects Of Pilot-Scale Passive Treatment Systems For Acid Rock Drainage At Metal Mines....Pages 777-793 Wheal Jane—can wetlands technology cope?....Pages 795-806 Retention of cadmium in clay minerals by a hydrothermal method....Pages 807-813 Use of Zeolitic Tuff For Control and Recycling of Effluent....Pages 815-824 NO x suppression with hydrogen peroxide in the metals industry....Pages 825-836 Application of Fibrous Ion Exchangers in Air Purification From Acidic Impurities....Pages 837-855 Front Matter....Pages 857-857 Hydrometallurgical processing of complex copper-zinc concentrates....Pages 859-867 Integration of Sherritt Zinc Pressure Leach Process at Ruhr-Zink refinery, Germany....Pages 869-885 Recovery of platinum group metals from oxide ores—TML Process....Pages 887-912 Front Matter....Pages 857-857 Development of Intec Copper Process by an international consortium....Pages 913-922 Introduction to spray roasting process for hydrochloric acid regeneration and its application to mineral processing....Pages 923-937 Production of high-grade tin in a new electrolytic plant....Pages 939-946 Front Matter....Pages 947-947 Towards zero-discharge mining: minimization of water outflow....Pages 949-960 Design of a tailing facility to mitigate potential acid rock drainage....Pages 961-969 Exploitation of shear and compression rheology in disposal of bauxite residue....Pages 971-982 Leaching of heavy metals from contaminated concrete rubbish material....Pages 983-992 Processing of electric arc furnace dust via chloride hydrometallurgy....Pages 993-1010 Prediction of water contamination arising from disposal of solid wastes....Pages 1011-1024 Improved process for concentration of ulexite and boric acid production....Pages 1025-1034 Decontamination of site of a secondary zinc smelter in Torrance,California....Pages 1035-1048 Disposal of Inorganic Wastes From Sulphate Titanium Dioxide Process at Langöya, Norway....Pages 1049-1058 Effluent treatment in IMI Phosphoric Acid Process....Pages 1059-1071 Front Matter....Pages 1073-1073 Metals Recovery From Hydrodesulphurization Catalysts....Pages 1075-1086 Environmentally sound hydrometallurgical recovery of chemicals from aluminium industry spent potlining....Pages 1087-1103 Recovery of vanadium from spent catalysts and alumina residues....Pages 1105-1121 Ecological treatment of waste products from zinc hydrometallurgy....Pages 1123-1151 Production of indium from Imperial Smelting Process residues....Pages 1153-1164 Back Matter....Pages 1165-1171 Papers presented at the international symposium `Hydrometallurgy '94' organized by the Institution of Mining and Metallurgy and the Society of Chemical Industry, and held in Cambridge, England, from 11-15 July 1994