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Some Recent Developments In The Extraction Metallurgy Of Gold In South Africa
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Book Synopsis Some Recent Developments in the Extraction Metallurgy of Gold in South Africa by :
Download or read book Some Recent Developments in the Extraction Metallurgy of Gold in South Africa written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The South African gold industry is approximately one hundred years old, and is still characterized by a dynamic spirit of research and innovation. With the apparently inexorable rise in the price of gold, even minor improvements in recovery or reductions in operating costs have major economic significance. Recent advances in metallurgical research and development include the following: (i) An electrochemical explanation for the gold-cementation process. This indicates why such large amounts of zinc - some twenty times the stoichiometric requirement - together with lead nitrate are necessary for the almost complete precipitation of gold from cyanide solution. (ii) Application of the carbon-in-pulp process to the direct extraction of dissolved gold from cyanidation pulps. Novel features include a technique for retaining the loaded granules of activated carbon against the pulp flow, a new technique for subsequent stripping of the gold from the carbon, and the development of a packed-bed electrode cell for electrowinning of the gold from the eluate. A solution to the problem of clogging in the ball matrix of wet high-intensity magnetic separators used for the beneficiation of Witwatersrand uranium-and-gold-bearing residues. The balls, which are in a carousel, are removed continuously through a side discharge, are cleaned, and are returned to the separator. (iv) The development of a powerful but compact centrifugal mill for the underground milling of Witwatersrand ores in deep mines so that the milled product can be concentrated and then pumped to the surface, the discard material being used as backfill in the excavation. The anticipated reduction in the amount of energy required to hoist low-grade ores through thousands of metres, together with a reduction in ventilation and supporting structures, promises to extend the lives of mines that have become too deep to be exploited economically with existing technology. (v) The large-scale reclamation of gold from tailings dumps. One example involves the retreatment of several mine dumps many kilometres apart at a central processing plant - the Ergo project. Apart from a plant handling 2100 tons of dump material per hour, housing 156 flotation cells (the majority of which are 14 000 litres in volume) and three tailings-thickener tanks each 138 metres in diameter, the production and transportation of the pulp is an impressive exercise.
Book Synopsis Recent Advances in the Extractive Metallurgy of Gold by :
Download or read book Recent Advances in the Extractive Metallurgy of Gold written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Extractive Metallurgy of Gold in South Africa by : G. G. Stanley
Download or read book The Extractive Metallurgy of Gold in South Africa written by G. G. Stanley and published by . This book was released on 1987 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Carbon and the Recovery of Gold : Some Recent Developments by the National Institute for Metallurgy by :
Download or read book Carbon and the Recovery of Gold : Some Recent Developments by the National Institute for Metallurgy written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes some aspects of NIM's recent progress in the extraction of gold.
Book Synopsis Extractive Metallurgy of Gold in South Africa by : G. G. Stanley
Download or read book Extractive Metallurgy of Gold in South Africa written by G. G. Stanley and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Extractive Metallurgy of Gold in South Africa by : G. G. Stanley
Download or read book The Extractive Metallurgy of Gold in South Africa written by G. G. Stanley and published by . This book was released on 1987 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Highlights of Current Metallurgical Research and Development in the South African Precious-metals and Ferro-alloy Industries by :
Download or read book Highlights of Current Metallurgical Research and Development in the South African Precious-metals and Ferro-alloy Industries written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Some of the current research-and-development programmes in South Africa are reviewed, including those involving the extraction metallurgy of gold, uranium, ferrochromium, ferromanganese, and the platinum-group metals, and the transfer of technology to the industry. The motivation for such research and development is the reduction of capital and operating costs, the improvement of existing processes by computer-assisted control and optimization, the development of new processes for ores not previously exploited, the optimization of energy consumption, and the further processing of minerals to intermediate and end products. In a country with a limited amount of highly-trained manpower, the optimization of metallurgical research and development has to be based on good technical interaction between the mining and metallurgical industries and their in-house laboratories on the one hand, and the national laboratories on the other. In addition, the successful transfer of technology from the research-and-development phase to industry is essential. The examples quoted demonstrate that the local metallurgical industry is supported by a vigorous research-and-development effort that should generate confidence in South Africa's continued large-scale supply of raw and processed mineral products at competitive prices.
Book Synopsis Extractive Metallurgy of Gold in South Africa by : G. G. Stanley
Download or read book Extractive Metallurgy of Gold in South Africa written by G. G. Stanley and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Extractive Metallurgy of Gold by : John C. Yannopoulos
Download or read book The Extractive Metallurgy of Gold written by John C. Yannopoulos and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: The history of gold begins in antiquity. Bits of gold were found in Spanish caves that were used by Paleolithic people around 40,000 B.C. Gold is the "child of Zeus," wrote the Greek poet Pindar. The Romans called the yellow metal aurum ("shining dawn"). Gold is the first element and first metal mentioned in the Bible, where it appears in more than 400 references. This book provides the most thorough and up-to-date information available on the extraction of gold from its ores, starting with the miner alogy of gold ores and ending with details of refining. Each chapter con cludes with a list of references including full publication information for all works cited. Sources preceded by an asterisk (*) are especially recom mended for more in-depth study. Nine appendices, helpful to both students and operators, complement the text. I have made every attempt to keep abreast of recent technical literature on the extraction of gold. Original publications through the spring of 1989 have been reviewed and cited where appropriate. This book is intended as a reference for operators, managers, and designers of gold mills and for professional prospectors. It is also designed as a textbook for extractive metallurgy courses. I am indebted to the Library of Engineering Societies in New York, which was the main source of the references in the book. The assistance of my son, Panos, in typing the manuscript is gratefully acknowledged.
Book Synopsis Gold Metallurgy in South Africa by : D. E. R. Ayres
Download or read book Gold Metallurgy in South Africa written by D. E. R. Ayres and published by . This book was released on 1972 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrometallurgy in Extraction Processes by : C. K. Gupta
Download or read book Hydrometallurgy in Extraction Processes written by C. K. Gupta and published by CRC Press. This book was released on 1990-08-15 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two-volume set provides a full account of hydrometallurgy. Filled with illustrations and tables, this work covers the flow of source material from the mined or concentrate state to the finished product. It also highlights ion exchange, carbon adsorption and solvent extraction processes for solution purification and concentration. The extensive reference list-over 850-makes this set a valuable resource for extraction and process metallurgists, researchers, and practitioners.
Author :Institution of Mining and Metallurgy Publisher :Springer Science & Business Media ISBN 13 :9401136564 Total Pages :344 pages Book Rating :4.4/5 (11 download)
Book Synopsis African Mining ’91 by : Institution of Mining and Metallurgy
Download or read book African Mining ’91 written by Institution of Mining and Metallurgy and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second 'African Mining' conference is planned for June 1991, and follows the first, very successful, event held in May 1987. That full four-year period was characterized by substantial changes in the political and economic climate of many countries in both hemispheres. Copper prices were relatively firm, and the advance and steady demand for nickel and ferrochromium stabilized important sectors of the mineral industry, certainly in Zimbabwe. The promise for gold remained unfulfilled, but the smaller, relatively flexible, mines survived and only the large, deep and low-value mines seem seriously at risk. None of this has affected the hungry, and intensive exploitations from surface to the water-table have revealed many targets of promise to those willing to take the risks. The pattern in Southern Africa was extraordinarily stable among the turmoil, with independence for Namibia, adjustments in South Africa and a gradual shift to market economies in the region. The pace of exploration has increased to recover some part of the progress that was lost in the Independence struggle, and atthe end of the first decade in Zimbabwe, for example, oil is being sought in the Zambesi Rift, following the investigation of the Luangwa in Zambia, and there are exciting exploration projects for methane released from coal, deep in its basins.
Book Synopsis Hydrometallurgy in Extraction Processes, Volume II by : C. K. Gupta
Download or read book Hydrometallurgy in Extraction Processes, Volume II written by C. K. Gupta and published by Routledge. This book was released on 2017-11-01 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two-volume set provides a full account of hydrometallurgy. Filled with illustrations and tables, this work covers the flow of source material from the mined or concentrate state to the finished product. It also highlights ion exchange, carbon adsorption and solvent extraction processes for solution purification and concentration. The extensive reference list-over 850-makes this set a valuable resource for extraction and process metallurgists, researchers, and practitioners.
Download or read book Conference Papers Index written by and published by . This book was released on 1980 with total page 1198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monthly. Papers presented at recent meeting held all over the world by scientific, technical, engineering and medical groups. Sources are meeting programs and abstract publications, as well as questionnaires. Arranged under 17 subject sections, 7 of direct interest to the life scientist. Full programs of meetings listed under sections. Entry gives citation number, paper title, name, mailing address, and any ordering number assigned. Quarterly and annual indexes to subjects, authors, and programs (not available in monthly issues).
Book Synopsis Journal of the South African Institute of Mining and Metallurgy by : South African Institute of Mining and Metallurgy
Download or read book Journal of the South African Institute of Mining and Metallurgy written by South African Institute of Mining and Metallurgy and published by . This book was released on 1996 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Journal of the Chemical, Metallurgical and Mining Society of South Africa by : Chemical, Metallurgical, and Mining Society of South Africa
Download or read book The Journal of the Chemical, Metallurgical and Mining Society of South Africa written by Chemical, Metallurgical, and Mining Society of South Africa and published by . This book was released on 1920 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Science and Technology Publisher : ISBN 13 : Total Pages :138 pages Book Rating :4.3/5 (121 download)
Book Synopsis Oversight of Energy Development in Africa and the Middle East by : United States. Congress. House. Committee on Science and Technology
Download or read book Oversight of Energy Development in Africa and the Middle East written by United States. Congress. House. Committee on Science and Technology and published by . This book was released on 1980 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
