Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
United States Patent : US5147617 : Process for Recovery of Gold from Gold Ores Using a Complexing Pretreatment and Sulfurous Acid Leaching
Author: Metals Abstracts
Author: United States Patent : US5536297 : Gold Recovery from Refractory Carbonaceous Ores by Pressure Oxidation and Thiosulfate Leaching
Author: Gold
Author: Nathaniel ArbiterPublisher: CRC Press
ISBN: 9782881243974
Category : Business & Economics
Languages : en
Pages : 242
Book Description
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
The Recovery of Gold from the Fairview Dump After Pretreatment with Sulphurous Acid
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 14
Book Description
This report deals with the liberation of gold from the Fairview cyanidation tailing dump by a sulphurous acid treatment before cyanidation. It has been found that, before appreciable quantities of gold could be extracted, it was necessary to dissolve the hematite coating surrounding the gold particles. The pretreatment of the material in sulphurous acid at atmospheric pressure enabled approximately 32 per cent of the gold to be freed, but, because the dissolution of the hematite under these conditions was extremely slow, subsequent testwork was carried out on pressure leaching. Pressure leaching with sulphurous acid at 110 degrees C and 400 psig for 11 hours dissolved 99 per cent of the hematite, and about 90 per cent of the gold was extracted from the then clean gangue. Under the pressure-leaching conditions employed, the hematite dissolution followed a mechanism resembling a pseudo first-order reaction, the gold extraction being directly proportional to that of the iron. The processing of the dump by this method on an industrial scale would pose many problems, and it is unlikely that it would prove to be an attractive process for the recovery of the gold.
A Process for the Recovery of Gold from Activated Carbon by Leaching and Electrolysis
Author: J. B. ZadraProcessing Gold Ores Using Heap Leach-carbon Adsorption Methods
Author: Harold J. HeinenPublisher:
ISBN:
Category : Adsorption
Languages : en
Pages : 32
Book Description
United States Patent : US5013359 : Process for Recovering Gold from Refractory Sulfidic Ores
Author: United States Patent : Process of Recovering Copper and of Optionally Recovering Silver and Gold by a Leaching of Oxide-and Sulfide-containing Materials with Water-soluble Cyanides
Author: The Chemistry of Gold Extraction
Author: John MarsdenPublisher: Prentice Hall
ISBN:
Category : Science
Languages : en
Pages : 618
Book Description
A survey of the technological advances in gold extraction techniques, this text emphasizes practical applications and traces the actual process of extraction from ore mineralogy to bullion production. The main hydrometallurgical processes involved, such as leaching, are also covered.