Mineral speciation and liberation characteristics of primary host minerals, mineral speciation and texture of iron oxides newly formed during pre-oxidation, gold distribution and preg-robbing capability of carbonaceous matter may also …
Environmental impacts of gold production from double refractory ore were studied using LCA. • Grinding and gas handling systems made the greatest contribution to the carbon footprint. • Major contributors to global warming in off-gas treatment were SO 2 scrubber and NO x reduction. •
To provide a comprehensive environmental perspective on the large-scale gold mining operations in Nevada, this study used a life cycle assessment (LCA) approach to evaluate the environmental burdens of gold production from double refractory ores in the roasting process.
In the case of gold ores, physical separation can be employed to produce concentrates, and in the case of free-milling ores or to produce gold intermediate-enriched mineral products, by rejecting gangue material, which facilitates more effective hydrometallurgy.
This article introduces an innovative gold-leaching process using a non-toxic organic reagent, dimethyl sulfoxide (DMSO), a water-free lixiviant that extracts gold from ores/concentrates in ...
World mineral loss and possibility to increase ore recovery ratio in mining production. Zong-Xian Zhang., De-Feng Hou., Adeyemi Aladejare., Toochukwu Ozoji. & Yang Qiao. Pages 670-691 | Received 24 Sep 2020, Accepted 01 Apr 2021, Published online: 28 Jul 2021. Cite this article. https://doi/10.1080/17480930.2021.1949878. In …
This study investigates the environmental impacts of direct cupric gold chloride leaching from refractory ores, in order to provide numerical and comparable environmental impact values for the alternative development-stage …
The study indicates that the major challenges in processing complex gold-copper ores through the conventional cyanidation method include (1) increase in cyanide consumption; (2) increase in cyanide destruction cost; (3) low gold recovery; (4) decrease in adsorption efficiency; (5) decrease in electrowinning efficiency, and (6) difficulties in ...
Using gold as a case study, Calvo et al. investigated how the decline in gold ore grade affects energy expenditure and the associated environmental impact using current technology. The authors conclude from the case study that the lower the ore grade, the greater the energy requirements for ore processing.
The chemical recovery of gold can be defined by two different operations: the oxidative dissolution of gold and the reductive precipitation of metallic gold from the solution. Cyanide is one of the most attractive lixiviants in the current industrial gold leaching process.
