Towards industrial implementation of glycine-based leach and adsorption technologies for gold-copper ores

Eksteen, Jacques; Oraby, Elsayed; Tanda, B.C.; Tauetsile, P.J.; Bezuidenhout, G.A.; Newton, T.; Trask, F.; Bryan, I E

doi:10.1080/00084433.2017.1391736

Cited by 35 publications

(9 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Despite a variety of studies dealing with heap leaching, the basic industrial trend is the classic hydrometallurgy using cyanide solutions to extract valuable components [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Influence of ore processing behavior on heap-leach cyanidation and agitation leaching efficiency

Fedotov¹,

Сенченко²,

Fedotov³

2022

View full text Add to dashboard Cite

The study addresses efficiency of heap-leach cyanidation as function of processing properties of ore. The grain size composition, chemistry and mineralogy represent the main ore properties. The test ore samples contain up to 76% of aluminum and silicon oxides. The ore features a few impurities and a moderate amount of sulfide sulfur (0.6%). Assaying after preliminary gravity separation of gold shows that average Au content is 1.74 g/t (site 1) and 1.43 g/t (site 2). This research aims to analyze the processing properties of ore and assess expediency of heap-leach cyanidation of this ore. The representative samples for the heap leach tests are the primary sulfide ore. The lab-scale tests of agitation cyanidation of ore samples from different sites were carried out using bottle agitator. The scope of the analysis also embraced the influence of the ore size and cyanide concentration on the leaching efficiency. Furthermore, adsorption of gold from cyanidation solutions was also tested. The cyanidation products were subjected to atomic adsorption spectroscopy (solution) and assaying (cake).

show abstract

“…Despite a variety of studies dealing with heap leaching, the basic industrial trend is the classic hydrometallurgy using cyanide solutions to extract valuable components [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Influence of ore processing behavior on heap-leach cyanidation and agitation leaching efficiency

Fedotov¹,

Сенченко²,

Fedotov³

2022

View full text Add to dashboard Cite

show abstract

“…Over the last few years glycine (H 2 N-CH 2 -COOH), as a widely used non-toxic, edible, nonvolatile and non-flammable amino acid, has been studied as a new type of reagent for the J o u r n a l P r e -p r o o f selective leaching of copper from related oxide and sulfide ores as well as gold-copper concentrates (Eksteen et al, 2016;Eksteen et al, 2017;Eksteen et al, 2018;O'Connor et al, 2018a;O'Connor et al, 2018b;Oraby and Eksteen, 2014;Oraby and Eksteen, 2015a;Oraby and Eksteen, 2015b;Oraby et al, 2017;Shin et al, 2019;Tanda et al, 2017a;Tanda et al, 2019;Tanda et al, 2017b). Glycine is also soluble in water and can readily form soluble complexes with both cupric and cuprous ions like: Cu(H 3 NCH 2 COO) 2+ , Cu(H 2 NCH 2 COO) + , Cu(H 2 NCH 2 COO) 2+ and Cu(H 2 NCH 2 COO 2- (Oraby and Eksteen, 2015a;Sun et al, 2017;Tanda et al, 2017a).…”

Section: Introductionmentioning

confidence: 99%

Investigation into the effect of mechanical activation on the leaching of chalcopyrite in a glycine medium

et al. 2021

View full text Add to dashboard Cite

“…The metals could be recovered from organic leachates via solvent extraction or sulfide precipitation [14]. Aung and Ting [15] leached the FCC catalyst (at 1-12% pulp densities, D mean = 94 µm) using biogenic acids fermented from sucrose by A. niger (composed of 57 mM citric acid, 48 mM gluconic acid and 7 mM oxalic acid); the results were compared with chemical leaching tests using inorganic (sulfuric and nitric acids) and organic acids (citric, oxalic and gluconic acids).…”

Section: Introductionmentioning

confidence: 99%

Recovering Secondary REE Value from Spent Oil Refinery Catalysts Using Biogenic Organic Acids

2020

View full text Add to dashboard Cite

Spent catalysts produced by oil refinery industries are regarded as an important secondary source for valuable metals. In particular, spent fluid catalytic cracking (FCC) catalysts represent a potential source for rare earth elements (REEs). This study aimed to exploit the leachability of spent FCC catalysts as a secondary source for La, by using an alternative organic acid lixiviant produced under optimized fungal fermentation conditions. The first chemical leaching tests revealed that citric acid (>100 mM) is a comparable alternative lixiviant to conventional inorganic acids (1 M) and that the La dissolution behavior changed significantly with different types of organic acids. The initial fungal fermentation conditions (e.g., inoculum level, substrate concentration, pH) largely affected the resultant biogenic acid composition, and its manipulation was possible in order to almost solely ferment citric acid (~130 mM) while controlling the production of unwanted oxalic acid. The performance of actual biogenic acids (direct use of cell-free spent media) and artificially reconstituted biogenic acids (a mixture of chemical reagents) was nearly identical, achieving a final La dissolution of ~74% at a pulp density of 5%. Overall, the microbiological fermentation of organic acids could become a promising approach to supply an efficient and environmentally benign alternative lixiviant for REE scavenging from spent FCC catalyst wastes.

show abstract

Towards industrial implementation of glycine-based leach and adsorption technologies for gold-copper ores

Cited by 35 publications

References 11 publications

Influence of ore processing behavior on heap-leach cyanidation and agitation leaching efficiency

Influence of ore processing behavior on heap-leach cyanidation and agitation leaching efficiency

Investigation into the effect of mechanical activation on the leaching of chalcopyrite in a glycine medium

Recovering Secondary REE Value from Spent Oil Refinery Catalysts Using Biogenic Organic Acids

Contact Info

Product

Resources

About