Percolation bioleaching of copper and zinc and gold recovery from flotation tailings of the sulfide complex ores of the Ural region, Russia

2012 ◽  
Vol 111-112 ◽  
pp. 82-86 ◽  
Author(s):  
Tamara F. Kondrat'eva ◽  
Tatiana A. Pivovarova ◽  
Alexandr G. Bulaev ◽  
Vitaliy S. Melamud ◽  
Maxim I. Muravyov ◽  
...  
Keyword(s):  
Ural Region ◽  
Gold Recovery ◽  
Flotation Tailings ◽  
Copper And Zinc

Leaching of copper and zinc from copper converter slag flotation tailings using H2SO4 and biologically generated Fe2(SO4)3

2012 ◽  
Vol 119-120 ◽  
pp. 40-46 ◽  
Author(s):  
Maxim I. Muravyov ◽  
Natalya V. Fomchenko ◽  
Alexey V. Usoltsev ◽  
Evgeniy A. Vasilyev ◽  
Tamara F. Kondrat'eva
Keyword(s):  
Converter Slag ◽  
Flotation Tailings ◽  
Copper Converter ◽  
Copper And Zinc

scholarly journals On the possibility of flotation processing of technogenic gold-containing waste from enrichment plants

2021 ◽  
Author(s):  
L.V. Semushkina ◽  
◽  
S.M. Narbekova ◽  
Keyword(s):  
Chemical Analysis ◽  
Main Part ◽  
Gold Recovery ◽  
Butyl Xanthate ◽  
Flotation Reagent ◽  
Rational Analysis ◽  
Gold Extraction ◽  
Foaming Agent ◽  
Flotation Tailings ◽  
Fine Grained

The aim of the work is the flotation processing of gold-containing tailings using composite flotation (CF) agents. According to the results of chemical analysis, the studied tailings sample contains 0.39 g/t gold. The main part of the initial tailings sample is represented by rock-forming minerals such as quartz, clinochlore, microcline, tremolite, albite, calcite, and muscovite. According to the results of the rational analysis, 39.50% of gold is in the hard-to-recover form with quartz; 28.87% is in the form of fine-grained gold; 31.63% is in intergrowths with sulfides and rocks. The optimum reagent scheme of flotation processing of tailings was chosen: degree of regrinding of 95% of grade -0,074 mm, consumption of sodium butyl xanthate of 100 g/t, consumption of foaming agent T-92 of 30 g/t. Under the chosen reagent scheme the gold-containing concentrate containing 6,4 g/t gold at the recovery of 49,68% was obtained. Preliminary regrinding of tailings allows to increase the gold recovery in the blanks concentrates by 27.96%. The reagent scheme of flotation of gold-containing tailings with the application of composite flotation (CF) agent was tested. A composition of sodium butyl xanthate and reaeflot was used as a composite flotation reagent for the improvement of gold extraction from flotation tailings. Application of composite flotation (CF) agent pre-treated on the dispersant increases gold recovery into gold-containing concentrate by 4.65%, in comparison with the basic collector sodium butyl xanthogenate. Consumption of flotation agent CF is reduced by 20%.

Separation of Copper and Zinc by Solvent Extraction During Reprocessing of Flotation Tailings

2010 ◽  
Vol 45 (4) ◽  
pp. 535-540 ◽  
Author(s):  
Willy Kitobo ◽  
Stoyan Gaydardzhiev ◽  
Jean Frenay ◽  
David Bastin ◽  
Ilunga Ndala
Keyword(s):  
Solvent Extraction ◽  
Flotation Tailings ◽  
Copper And Zinc

scholarly journals Hydrometallurgical Processing of the Wastes of Polymetallic Ore Dressing

2020 ◽  
Author(s):  
Aleksander Bulaev
Keyword(s):  
Sulfuric Acid ◽  
Noble Metals ◽  
Ferrous Metal ◽  
Sulfuric Acid Concentration ◽  
Acid Leaching ◽  
Gold Recovery ◽  
Flotation Tailings ◽  
Hydrometallurgical Processing ◽  
Two Samples ◽  
Sulfide Concentrates

The possibility of hydrometallurgical treatment of old flotation tailings to extract base and noble metals was investigated. Two samples of old flotation tailings samples containing 0.26% and 0.36% of copper, and 0.22% and 0.23% of zinc were the subjects of this study. Agitation and percolator leaching was performed with distilled water and sulfuric acid solutions (of 0.5 to 10% H2SO4). It was shown that under certain conditions (sulfuric acid concentration) it was possible to achieve selective leaching of non-ferrous metals and obtain solutions with relatively low concentrations of iron ions, which is necessary for further effective extraction of non-ferrous metal ions from the solution. The effect of acid leaching on further gold recovery from the first sample containing 0.7 g/t of gold by cyanidation was investigated. The sample of the tailings after leaching with a 1% sulfuric acid solution was leached with 10% sulfuric acid. After that, the tailings sample and the acid leach residues were subjected to sorption cyanidation. Two-stage acid leaching with 1 and 10% sulfuric acid provided the higher gold recovery than one-stage (49 and 65%, respectively). Also it was shown that pregnant solution obtained during leaching of the second sample with 10% sulfuric acid may be used for oxidative leaching of substandard copper-zinc concentrate that allowed to 13 and 48% of copper and zinc from the concentrate during the leaching at 80∘C. Keywords: flotation tailings, leaching, substandard sulfide concentrates

Two-Stage Agitation Leaching of Old Flotation Tailings

2019 ◽  
Vol 298 ◽  
pp. 116-120
Author(s):  
Aleksandr Bulaev ◽  
Vitaliy Melamud ◽  
Anna Boduen
Keyword(s):  
Sulfuric Acid ◽  
Acid Leaching ◽  
Selective Extraction ◽  
Iron Ions ◽  
Two Stage ◽  
Flotation Tailings ◽  
Second Stage ◽  
Copper And Zinc ◽  
Copper Zinc ◽  
Zinc Concentrate

The goal of the present work was to develop hydrometallurgical approaches based on acid leaching for selective extraction of base metals from the sample of old flotation tailings as well as obtaining solution, which can be used for leaching of substandard copper-zinc concentrate. Old flotation tailings contained 23.2% of iron, 0.36% of copper, and 0.23% of zinc. Copper-zinc concentrate contained 23.8% of iron, 16% of copper, and 5.3% of zinc. Agitation leaching of old flotation tailings with distilled water and sulfuric acid solutions (of 0.5 to 10% H2SO4) for 3 h at pulp density of 20% made it possible to extract of 26 to 34% and of 58 to 70% of copper and zinc, respectively. Concentrations of copper and zinc in the pregnant solutions were of 0.19 to 0.25 g/L and of 0.27 to 0.32 g/L, respectively. The increase in H2SO4 concentration up to 10% did not lead to significant increase in base metals extraction but led to significant increase in iron ions concentration in the pregnant solutions. Pregnant solution obtained during the leaching with water contained less than 1 g/L of iron ions, while that obtained during the leaching with 10% sulfuric acid contained about 9 g/L of iron ions. Therefore, two-stage acid leaching with water and 10% sulfuric acid was proposed for selective extraction of non-ferrous metals in the first stage and obtaining of ferric iron solution in the second stage. Two-stage leaching at pulp density of 40% with water made it possible to extract 31 and 64% of copper and zinc, respectively. It was shown, that second stage did not allow to increase non-ferrous metals extraction but made it possible to obtain solution containing 11g/L of ferric iron. This pregnant solution was used for oxidative leaching of copper-zinc concentrate. Leaching at 80°C made it possible to extract 13 and 48% of copper and zinc, respectively.

Ca++-ATPase activity in the hepatopancreas cells of Oniscus asellus

1992 ◽  
Vol 50 (1) ◽  
pp. 820-821
Author(s):  
G.M. Vernon ◽  
A. Surace ◽  
R. Witkus
Keyword(s):  
B Cells ◽  
Epithelial Cell ◽  
Atpase Activity ◽  
Calcium Transport ◽  
Carcinus Maenas ◽  
Cell Types ◽  
Molt Cycle ◽  
Copper And Zinc

The hepatopancreas consists of a pair of bilobed tubules comprised of two epithelial cell types. S cells are absorptive and accumulate metals such as copper and zinc. Ca++ concentrations vary between the S and B cells and during the molt cycle. Roer and Dillaman implicated Ca++-ATPase in calcium transport during molting in Carcinus maenas. This study was undertaken to compare the localization of Ca++-ATPase activity in the S and B cells during intermolt.

COPPER AND ZINC INDUCED CHANGES IN SOYBEAN (Glycine max (L.) Merr.)

1970 ◽  
pp. 09
Author(s):  
K. SANKAR GANESH ◽  
P. SUNDARAMOORTHY
Keyword(s):  
Heavy Metals ◽  
Glycine Max ◽  
Aquatic Environment ◽  
Morphological Traits ◽  
Industrial Activities ◽  
Copper And Zinc ◽  
Glycine Max L ◽  
Zinc Concentrations ◽  
Induced Changes

Heavy metals are one of the most important pollutants released to the aquatic environment by the various industrial activities. The use of these wastewater for irrigation results accumulation of heavy metals in soil and plants. So, the present investigation deals with the various concentrations (0, 5, 10, 25, 50, 100, 200 and 300 mg/l) of copper and zinc on germination studies of soybean. The different concentrations of copper and zinc were used for germination studies. The seedlings were allowed to grow upto seven days. The studied morphological traits increased at 5 mg/l concentration and these parameters are gradually decreased with the increase of copper and zinc concentrations.

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