Download or read book The Influence of Microwaves on the Leaching Kinetics of Sulphide Minerals written by M. Al-Harahsheh and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Fundamental Investigation Into the Microwave Assisted Leaching of Sulphide Minerals written by Mohammad Al-Harahsheh and published by . This book was released on 2005 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrometallurgy 2008 written by and published by SME. This book was released on 2008 with total page 1201 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Control of Acid Drainage from Coal Refuse Using Anionic Surfactants written by Robert L. P. Kleinmann and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Mixed Kinetics Dump Leaching Model for Ores Containing a Variety of Copper Sulfide Minerals written by Brent W. Madsen and published by . This book was released on 1981 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of the Influence of Bacterial Oxidation on the Flotation Kinetics of Sulphide Minerals written by Ibraheem Mahmood Mansour and published by . This book was released on 1981 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Drying Roasting and Calcining of Minerals written by Thomas Battle and published by Springer. This book was released on 2016-12-01 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers in this volume give the reader focused information on the important extractive metallurgy unit operations of drying, roasting, and calcining
Download or read book Investigation of Reactions and Kinetics in Leaching of Complex Polysulphide Minerals written by Crispulo C. Sideco and published by . This book was released on 1962 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of the Influence of Thermal Treatment on the Bacterial Leaching of Sulphide Minerals written by Ahmed El-Hag Abd El Gadir El Amin and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Microwave Pretreatment on the Processing of a Sulphide Ore written by Gilberto Rodrigues da Silva and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The mining industry is one of the most energy intensive sectors of the economy, accounting for almost 2% of the world's electrical consumption. In a mill, most of this energy is spent in comminution processes, especially grinding. As the conventional grinding techniques are reported to present low efficiency, new methods have been proposed to pre-treat the ore, making it easier to grind. Among these techniques, Microwave Assisted Comminution (MAC) has presented great potential to reduce the energy required in grinding and also to improve liberation and flotation. MAC relies on the fact that minerals present different heating rates when microwave-treated. Therefore, due to thermal gradients, stresses can develop at grain boundaries within the ore, forming intergranular fractures which enhance the liberation of valuable minerals. Since the heat can cause oxidation, flotation of sulphide ores is affected by MAC. This Ph.D. research studied how microwave irradiation affects the phase composition, surface chemistry, surface charge, hydrophobicity and morphology of the main sulphide minerals present in the Discovery Hill Cu-Ni sulphide ore: pyrrhotite, chalcopyrite and pentlandite. The effects of the treatment on the adsorption and floatability of these minerals with potassium amyl xanthate and sodium oleate were also examined. Finally, the effects of the treatment on the Bond Work Index, liberation and flotation performance of the ore were investigated. The results of this study indicate that chalcopyrite, pyrrhotite and pentlandite are oxidized differently by microwave treatment. While chalcopyrite and pyrrhotite presented no phase transformation, a S-rich mineral phase was formed onto the surface of pentlandite. Chalcopyrite had its collectorless floatability enhanced and its surface energy decreased by short time exposure to microwave radiation. Longer exposure times made chalcopyrite more hydrophilic and decreased its floatability, whereas any exposure time led to an increase in the hydrophilicity of pyrrhotite and pentlandite. The surface of all the minerals became more positively charged at acidic pH. In addition, microwave irradiation increased the minerals' specific surface area, especially that of pentlandite. It was also observed an increase in the average pore diameter in the surface of chalcopyrite and a decrease for pyrrhotite and especially pentlandite. Greater adsorption of potassium amyl xanthate was noticed although the recovery pyrrhotite and chalcopyrite decreased. In the presence of sodium oleate, the recovery of all minerals dropped significantly, with the exception of pyrrhotite at acidic and neutral pH. The Discovery Hill Cu-Ni ore presents a favorable mineralogy to benefit from MAC. Exposure time, power level, samples mass, particle size and the use of quenching with water were important variables affecting both the ore's Bond Work Index (Wi) and flotation performance. While coarser particles showed greater decrease in the Wi, the finer samples presented significant increase in the enrichment ratio after being irradiated. The occurrence of melting/sintering was observed to be detrimental to both grinding and flotation, suggesting homogeneity to be of primary importance for the future development of MAC." --
Download or read book A Study of the Influence of Thermal Treatment on the Bacterial Leaching of Sulphide Minerals written by Ahmed E.A. El Amin and published by . This book was released on 1983 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of the Influence of Thermal Treatment on the Bacterial Leaching of Sulphide Minerals written by A. E. A. Al-Amin and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Kinetics of the Leaching of Zinc Sulphide Concentrates in Acidic Solutions Containing Ferric Sulphate written by P. D. Scott and published by . This book was released on 1978 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coal Desulfurization written by S. K. Kawatra and published by Taylor & Francis. This book was released on 2001 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book was written to provide a comprehensive survey of the current state-of-the-art information in coal preparation, with particular emphasis on coal desulfrization. The primary audience for this book will be practising coal preparation engineers who need complete information about all of the coal preparation and desulphurization technologies that are available now, or that may be available in the future. It will also be valuable for coal researchers who need details and comparative data for cutting-edge technologies that are still under development. The main emphasis is on physical coal preparation, but chapters also include chemical and biological technologies that are under development, but not yet used in industrial practice. Along with the successful technologies, also included are details of processes and techniques that were attempted, but were subsequently abandoned, along with discussions of the reasons they were abandoned.
Download or read book The Non oxidative Leaching of Oxides and Sulphides an Electrochemical Approach written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The basic theoretical aspects of an electrochemical model for the dissolution of ionic solids are briefly reviewed. It is shown that a large body of experimental data on the kinetics of the non-oxidative leaching of oxide and sulphide minerals can best be interpreted by the use of this model, rather than by the various adsorption theories previously proposed. Some minerals require the presence of oxidizing or reducing agents for rapid leaching. This is shown as the result of a requirement that the surface of the mineral be composed of a stoichiometric compound that will dissolve non-oxidatively.
Download or read book R D Abstracts written by Technology Reports Centre (Great Britain) and published by . This book was released on 1981 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Particle Size on the Kinetics of Microbiological Leaching of Chalcopyrite written by Martha Alicia Blancarte-Zurita and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
