Objectif This industrial research project is directed at the use of therrnophilic bacteria for the bioleaching of sulphide minerals and has been designated the "HIOX" process. Although a considerable amount of research work has been carried out on mesophiles and several plants have been installed for Au bearing materials, there has to date been no significant commercial breakthroughs in the use of thermophilic bacteria. In addition, the technology of bacterial leaching is dominated by South Africa and Australia and it is the intention of this project to establish the EU as a major technology base for bioleaching, by using the expertise in the field of thermophilic bacterial leaching which presently exists within Europe. Two types of thermophiles will be considered: the moderate/high temperature thermophiles which operate at 55 75 C and the extreme thermophiles which operate above 75 C. The work will be arranged so that all aspects of the process flowsheet are covered i.e. the bioleaching and downstream process steps will be tested so that an integrated industrial application can be finally evaluated For all of the process steps the focus will be on the practical parameters required for the optimisation of an industrial application based on the "HIOX" process. The industrial objectives will be to develop a new bioleaching process: for the treatment of chalcopyrite, which at present is only treatable by pyrometallurgical methods or by high pressure leaching, both with environmental disadvantages; for metal production from complex sulphide concentrates which are presently untreatable by conventional means; which is more economic and environmentally friendly, for metal production from a range of other base metal and Au bearing sulphide minerals and which can operate on a small scale; for metal production from low grade concentrates (e.g. rougher flotation concentrates) and therefore obtain higher metal recoveries from the mine; that is environmentally friendly and leaves a low grade inert residue and which does not produce SO2, H2SO4 or As2O3; that is an integrated hydrometallurgical process based on thermophilic bacterial leaching that can be economically used to produce Cu, Ni and Zn of 99.99% purity and Au suitable for further refining; with process flowsheets and plant designs to meet the above targets; which will make the European mining industry world leaders in the field of bioleaching, based on thermophilic bacterial mineral oxidation. The work will involve: Collection and Characterisation of Samples Sample Selection and Preparation Bacteriological Testwork Laboratory testwork with thermophiles Large scale Contiinuous Testwork Down Stream Processing Reactor Scale-up Environmental Studies Process Design Study Economic Study and Exploitation Plan The mining companies involved have each indicated one ore deposit in which they have an immediate interest and which cannot presently be exploited with existing technology. Most of these are located within the EU, namely Ireland, Spain, Sweden and Greece. If the "HIOX" process can be successfully demonstrated and is exploited commercially then these projects alone could generate over ECU 1.5 billion per annum of income from metal sales. The mining companies have combined annual sales of over ECU 8 billion so if this is extrapolated throughout the EU and worldwide then it is evident that the high temperature bioleaching of sulphide minerals has an enormous commercial potential. Champ scientifique natural sciencesbiological sciencesmicrobiologybacteriologynatural scienceschemical scienceselectrochemistryelectrolysisengineering and technologyenvironmental biotechnologybioremediationbioleachingengineering and technologyenvironmental engineeringmining and mineral processing Programme(s) FP4-BRITE/EURAM 3 - Specific research and technological development programme in the field of industrial and materials technologies, 1994-1998 Thème(s) 0103 - Rational management of raw materials Appel à propositions Data not available Régime de financement CSC - Cost-sharing contracts Coordinateur MINERAL INDUSTRY RESEARCH ORGANISATION Contribution de l’UE Aucune donnée Adresse 6,City Square 1 LS1 2ES LEEDS Royaume-Uni Voir sur la carte Coût total Aucune donnée Participants (6) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire Boliden Mineral AB Suède Contribution de l’UE Aucune donnée Adresse 1,Kontorsvägen 936 00 Boliden Voir sur la carte Coût total Aucune donnée Bureau de Recherches Géologiques et Minières France Contribution de l’UE Aucune donnée Adresse Avenue du Concyr 45060 Orléans Voir sur la carte Coût total Aucune donnée Greenwich Resources plc Royaume-Uni Contribution de l’UE Aucune donnée Adresse Mathon Place 1 WR13 SNZ Mathon - Malvern Voir sur la carte Coût total Aucune donnée HENKEL KGAA Allemagne Contribution de l’UE Aucune donnée Adresse Henkelstrasse 67 40589 Düsseldorf Voir sur la carte Coût total Aucune donnée LULEAA UNIVERSITY OF TECHNOLOGY Suède Contribution de l’UE Aucune donnée Adresse University Campus, Porsean 971 87 LULEA Voir sur la carte Coût total Aucune donnée LaSource Compagnie Minière SAS France Contribution de l’UE Aucune donnée Adresse 31,Avenue de Paris 45000 Orleans Voir sur la carte Coût total Aucune donnée