Download or read book United States Patent US4552589 Process for the Recovery of Gold from Refractory Ores by Pressure Oxidation written by and published by . This book was released on 1985 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book United States Patent US5536297 Gold Recovery from Refractory Carbonaceous Ores by Pressure Oxidation and Thiosulfate Leaching written by and published by . This book was released on 1996 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book United States Patent US5013359 Process for Recovering Gold from Refractory Sulfidic Ores written by and published by . This book was released on 1991 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oxidation Process for Improving Gold Recovery from Carbon bearing Gold Ores written by Bernard J. Scheiner and published by . This book was released on 1971 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gold written by Nathaniel Arbiter and published by CRC Press. This book was released on 1990 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: The eight articles first appeared as volume 6 (no date) of Mineral processing and extractive metallurgy review. They review new methods of recovery for gold, and to some extent, silver, focus on the particular challenges of extraction from carbonaceous ores and from various sulfide-bearing ore, and the treatment of refractory gold ore, and discuss high-temperature and biological oxidation, high- temperature chlorination, and removing metals from leach liquor. Book club price, $40. Annotation copyrighted by Book News, Inc., Portland, OR
Download or read book United States Patent US5246486 Biooxidation Process for Recovery of Gold from Heaps of Low Grade Sulfidic and Carbonaceous Sulfidic Ore Materials written by and published by . This book was released on 1993 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Chemistry of Gold Extraction written by John Marsden and published by SME. This book was released on 2006 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extensively revised and updated, this edition provides the broad base of knowledge required by all working in the gold extraction and gold processing industries. It bridges the gap between research and industry by emphasizing practical applications of chemical principles and techniques.
Download or read book Metals Abstracts written by and published by . This book was released on 1986 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book United States Patent US5147617 Process for Recovery of Gold from Gold Ores Using a Complexing Pretreatment and Sulfurous Acid Leaching written by and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book United States Patent US4979986 Rapid Oxidation Process of Carbonaceous and Pyritic Gold bearing Ores by Chlorination written by and published by . This book was released on 1990 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Recovery of Gold from Refractory Ores written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Some recent work on the recovery of gold from refractory gold- bearing materials is described, special reference being made to some deposits in southern Africa. Possible explanations for the poor response of some gold-bearing materials to cyanidation are summarized, and the results of investigations into four techniques to enhance the response of refractory gold-bearing materials to cyanidation are presented. Mineralogical examinations of the feed and solid residues are used to show the reasons for the results obtained. Compared to conventional cyanide leaching, cyanidation under elevated pressure and lowered alkalinity significantly enhanced the rate of gold dissolution but, for all the samples except a stibnite concentrate, which gave a significantly better result, the final gold extraction showed no improvement. Activated carbon was deactivated, i.e. deprived of its ability to adsorb dissolved gold, by the addition of organic reagents. However, attempts similarly to poison the carbonaceous material in a sample of gold-bearing dump material were unsuccessful. Gold dissolution was enhanced by the oxidation of pyrite and arsenopyrite to sulphuric acid and aqueous ferric and arsenic species prior to cyanidation of the solid residue. A process comprising pyrolysis, mild oxidative leaching, the removal of elemental sulphur, and cyanidation gave gold dissolutions of up to 99 per cent, i.e. significantly better than by any other process.
Download or read book Alkaline Oxidative Leaching of Gold bearing Arsenopyrite Ores written by P. Bhakta and published by . This book was released on 1989 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Recovery Of Gold From Secondary Sources written by Syed Sabir and published by World Scientific. This book was released on 2016-06-29 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: New discoveries of the properties of gold at a nanoscale, and its effective use in modern technologies, have been driving a virtual 'gold rush'. Depleting natural resources has meant that the recovery of gold continues to grow in importance and relevance.The Recovery of Gold from Secondary Sources analyses the most advanced technology in gold recovery and recycling from spent sources of mobile phones, unwanted electronic equipment and waste materials. State-of-the-art techniques of hydrometallurgical and bio-metallurgical processing, leaching, cementing, adsorbing and separation through bio-sorbents are all described in detail, providing a guide for students and researchers. Discussion of environmentally friendly methods of recovery are presented, in order to provide modern-day alternatives to previous techniques. For those interested in the study of gold recovery this book gives a comprehensive overview of current recovery, making it the ultimate source of information for students, researchers, chemists, metallurgists, environmental scientists and electronic waste recovery experts.
Download or read book United States Patent US4597791 Gold Recovery Processes written by and published by . This book was released on 1986 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book United States Patent US5232490 Oxidation Reduction Process for Recovery of Precious Metals from MNO2 Ores Sulfidic Ores and Carbonaceous Materials written by and published by . This book was released on 1993 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oxidation Process for Improving Gold Recovery from Carbon bearing Gold Ores written by Bernard J. Scheiner and published by . This book was released on 1971 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Acid Pre oxidation in the Recovery of Gold from Refractory Sulfide Ores written by Leonardo M. Cornejo and published by . This book was released on 1983 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
