Analysis of adsorption of phytogenous collecting agents at the gold-containing sulfides during flotation

Contemporary Research and Developments in the Low-Toxic Chelating Reagents for the Extraction of Non-Ferrous and Noble Metals from Poor Polymetallic Ores and Processing Tailings

“…In ICEMR RAS (Moscow, Russia), a method for modifying solutions of conventional collectors-xanthate and dithiocarbamate-was developed [41][42][43]. The procedure helped to incorporate newly formed chemical compounds with functional groups that may form chelate compounds with non-ferrous and noble metal ions on the mineral surface, both independently or together with sulfhydryl collectors.…”

“…The procedure helped to incorporate newly formed chemical compounds with functional groups that may form chelate compounds with non-ferrous and noble metal ions on the mineral surface, both independently or together with sulfhydryl collectors. The application of the modified dithiocarbamate in gold ore flotation demonstrated an increase in gold recovery by 5-7%, and the Au concentrate quality rose by 1.3-1.5 times in laboratory tests [41][42][43].…”

“…Herbal reagents-chemically pure tannin and tannin-containing oak bark extract (OBE)-have been studied in order to float minerals containing noble metals. It has been established that, by changing the pH and concentration of the OBE and the order of introducing the depressant and the collector, it is possible to achieve the separation of some sulfides, in particular pyrite and arsenopyrite, to obtain a gold-bearing pyrite concentrate with an arsenic content of less than 2% [41,71,72].…”