Rough Flotation Research of Low Grade Gold Ore

Nie, Yi; Liu, Shu Xian; Qi, Dai

doi:10.4028/www.scientific.net/amm.543-547.3822

Cited by 2 publications

(2 citation statements)

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“…Considering the factors such as fine mineral rate, concentrate grade, tailings grade and recovery rate [10], when the filling body addition amount reaches 5%, the recovery rate decreases by nearly 1.75% compared with that without filling body addition, which has a great impact. The experimental results of closed-circuit flotation are shown in Table 2.…”

Section: Comparison Of Closed-circuit Flotation Resultsmentioning

confidence: 99%

Study on the Influence of Underground Filling Body on Flotation Index of Beneficiation in Gold Mine

Zhang

Zhu

et al. 2023

E3S Web of Conf.

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The processing capacity of a gold concentrator in Shandong mine is 10000 t/d, and the production process of one-stage grinding + one roughing, two sweeping and one finishing is adopted. The grinding fineness is 50%-55% of -200 mesh content, the flotation concentration is 40%-45%, and the dosage of butyl xanthate used as collector is 120 (g/t). The amount of QX-3 used as foaming agent is 40 (g/t), and the field flotation recovery rate is 93.74%. Because the mixing of tailings backfill into raw ore will cause the deterioration of flotation index, this study aims to find out the influence of tailings backfill in gold ore on flotation index, and put forward reasonable suggestions, so as to provide technical guidance for the mixing of tailings backfill in the subsequent production of gold mine.

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Section: Comparison Of Closed-circuit Flotation Resultsmentioning

confidence: 99%

Study on the Influence of Underground Filling Body on Flotation Index of Beneficiation in Gold Mine

Zhang

Zhu

et al. 2023

E3S Web of Conf.

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“…An appropriate volume of ethanol was added during preparation to maintain a uniform 3% ethanol concentration. The solutions, adjusted to pH 9.0 [40][41][42] with sodium hydroxide solution, were combined with 2 g of gold powder (Au > 99.99%, particle size, 0.074 mm, sourced from Zhongnuo New Material Technology Co., Ltd., Beijing, China) in conical flasks to form a 4% solid concentration gold powder solution. The mixture was stirred magnetically at room temperature for 30 min and then centrifuged at 9000 r/min for 15 min using a TG16-WS machine (Xiangyi Group, Changsha, China).…”

Section: Adsorption Experimentsmentioning

confidence: 99%

Interactions of Acetylene-Derived Thioester Collectors with Gold Surfaces: A First-Principles Study

Qiu,

Qi,

Wei

et al. 2024

Minerals

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The high reactivity of the acetylene group enables the formation of strong chemical bonds with active sites on mineral surfaces, thereby improving the flotation performance of gold minerals. This study utilized density functional theory (DFT) to analyze the quantum chemical parameters of structure, Mulliken population, and the frontier orbitals of a thioester collector containing an acetylene group, PDEC (prop-2-yn-1-yl diethylcarbamodithioate). PDEC was compared with analogous thioester collectors Z-200 and Al-DECDT. The interaction mechanism of PDEC on the Au(1 1 1) surface was simulated, followed by empirical validation through adsorption experiments. The findings indicate that the S atom of PDEC in the carbon–sulfur group exhibits shorter covalent bond lengths, and has reduced carbon–sulfur double bonds and Mulliken population, resulting in enhanced electron localization. This confers greater selectivity to PDEC during its adsorption on mineral surfaces. Frontier orbital analysis shows that the electrons of the acetylene group possess a notable electron-accepting capacity, significantly influencing the frontier orbital energy of PDEC and playing a pivotal role in the bonding interaction with mineral surfaces. Both the S atom in the carbon–sulfur group and its acetylene group establish stable adsorption structures with the A(111) surface in a single coordination mode. The adsorption energy sequence is PDEC > Al-DECDT > Z-200. Partial density of states demonstrates that the S 3p orbit of the carbon–sulfur group hybridizes with the Au 5d orbit, while the C 2p orbit of the acetylene group engages in weaker back-donation bonding with the Au 5d orbit. This is corroborated by the electron density difference and post-adsorption Mulliken population analyses, revealing that the S atom of the carbon–sulfur group in PDEC donates electrons to the Au atom, forming dominant positive coordination bonds, whereas the acetylene group accepts partial electrons from the Au atom, resulting in weaker back-donation bonds. The adsorption experiments align with the DFT adsorption energy results.

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Rough Flotation Research of Low Grade Gold Ore

Cited by 2 publications

References 0 publications

Study on the Influence of Underground Filling Body on Flotation Index of Beneficiation in Gold Mine

Study on the Influence of Underground Filling Body on Flotation Index of Beneficiation in Gold Mine

Interactions of Acetylene-Derived Thioester Collectors with Gold Surfaces: A First-Principles Study

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