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Isothermal titration calorimetry and density functional theory comparison study of xanthate, dithiophosphate and dithiocarbamate adsorption on pyrite surfaces M.G. Mulaudzi, J Taguta, B. McFadzean, and P.E. Ngoepe
By J Taguta, B. McFadzean, P. E. Ngoepe, M. G. Mulaudzi
Computational modelling methods and isothermal titration calorimetry (ITC) were employed to investigate the interaction of a pyrite surface with thiol collectors. Modelling work was conducted in the p
Jan 1, 2020
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Increased liberation and flotation performance of bulk copper flotation concentrate following its regrinding in a stirred media mill, A. Stefanov, K. Grossman, V. Stoilov, A. Angelov, U. Peuker, and S. Gaydardzhiev
By A. Angelov, U. Peukerd, S. Gaydardzhieve, A. Stefanov, K. Grossman, V. Stoilov
Flotation concentrate originating from the Asarel-Medet porphyry copper mining and processing complex in Bulgaria has been subjected to regrinding using a Ro-Star mill; the effects of which on the dow
Jan 1, 2020
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Applications of integrated novel gold deportment technique for complex refractory and copper gold ores, A. Chattopadhyay, B.K. Gorain, S. Dimov, and B. Hart
By B. Hart, B. K. Gorain, A. Chattopadhyay, S. Dimovc
This paper presents a detailed and systematic approach to metallurgy diagnostics using an integrated novel gold deportment technique for complex copper-gold and refractory gold ore bodies. This uantit
Jan 1, 2020
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Analysis of breakage behavior of inertia cone crusher with changes in feeding and operating conditions, X. Wang, T. Song, X.O. Xia, X.J. Luo, and B. Chen
By T. Song, X. Wang, X. O. Xia, X. J. Luo, B. Chen
Interparticle breakage is the main crushing mode of an inertia cone crusher according to its working principle and feeding condition. In this paper the breakage behaviour of an inertia cone crusher is
Jan 1, 2020
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Multiple ore types can result in multiple processing plants, A.J.H. Newell and K.Doherty
By A. J. H. Newell, K. Doherty
A copper-gold project has required a number of trade-off studies underpinned by test work to settle on pragmatic flowsheets and throughputs to support a pre-feasibility study that provides a compellin
Jan 1, 2020
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Effect of NaHS activation on the floatability of copper sulfide minerals, H. Matsuoka, K. Mitsuhashi, M. Kawata, T. Kato, and C. Tokoro
By H. Matsuoka, M. Kawata, K. Mitsuhashi, C. Tokoro, T. Kato
Copper sulfide minerals generally have high floatability, but their floatability decreases when surfaces are oxidised under some conditions. Sodium hydrosulfide, NaHS, is known both as an activator an
Jan 1, 2020
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Suitability of froth flotation in comparison to spiral washer for an existing coking coal washery – a case study for its improvement in respect to yield% at desired quality, S. Chaudhuri, U.S. Chattopadyay, S.C. Maji, and T. Gouri Charan
By S. C. Maji, U. S. Chattopadyay, S. Chaudhuri, T. Gouri Charan
India is devoid of coking coal resources, which is a vital raw material for coke making. As a result it has to import about 80% coking coal for steel making. Indian National Steel Policy, 2017 has env
Jan 1, 2020
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Thermo-sensitive polymers and modified reagents for flocculation and flotation of Au and Pt in the processing of complex ores, T.N. Matveeva, V.A. Chanturiya, and V.V. Getman
By V. V. Getman, V. A. Chanturiya, T. N. Matveeva
Most of the Au and PGM ores in Russia are characterised by a thin mineral impregnation of noble metals in sulfide minerals, and a large variety of mineral forms that lead to high loss of precious meta
Jan 1, 2020
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Preventing solids handling from being the weakest link, T. Holmes and C. Hartford
By C. Hartford, T. Holmes
Bulk-solids handling systems are often the most over-looked component and thereby weakest links in a processing plant’s value chain. Since their performance can dictate that of the entire operation, t
Jan 1, 2020
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The adsorption mechanism of 2-(benzylthio)-acetohydroxamic acid to diaspore, Q. Sun, H. Zhong, and S. Wang
By H. Zhong, S. Wang, Q. Sun
The flotation performance of 2-(benzylthio)-acetohydroxamic acid (BTHA) to diaspore was first evaluated by micro-flotation tests. The adsorption mechanism was further investigated through adsorption e
Jan 1, 2020
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Use of Cationic Coagulant to Improve Overflow Clarity of the Tailings Thickener at Kamoa Copper Plant
By P. Kitobo, T. Nduba, D. Mbay, J. B. Vangu, R. Ciband
The flotation plant tailings at Kamoa Copper Mine concentrator were found to contain a high proportion of extremely fine particles. The potential issues with settling these fine solids were resolved b
Jan 1, 2023
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Resistance spot welding of a thin 0.7 mm EN10130: DC04 material onto a thicker 2.4 mm 817M40 engineering steel
By R. C. Nkhoma, K. A. Annan, S. Ngomane
The effects of welding current, electrode force, and welding time in a resistance spot weld were studied to investigate the effectiveness of welded joints between a thin EN10130: DC04 material and a t
Oct 1, 2021
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Author's Reply
Dr Hanekom I would like to thank Dr Hanekom for a very valuable -contribution; it summarizes careful statistical test work which was an omission from the original paper. Minor manipulative details, t
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The optimization journey of the Harmony Gold’s South Uranium Plant operation and the uranium contribution to the gold operation as a by-product, R. Jacobs and R.E.L. Pobe
By R. Jacobs, R. E. L. Pobe
The Moab Khotsong Metallurgical Complex comprises a gold recovery circuit (Noligwa Gold Plant) and a uranium recovery circuit (South Uranium Plant). The metallurgical complex employs the reverse leach
Jan 1, 2020
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Molecular interactions between thiol collectors and non-ionic frothers in mixed monolayers at the air-water interface using a regular solution theory approach, D. Pienaar, B. McFadzean, and C. O’Connor
By D. Pienaar, C. O’Connor, B. McFadzean
Dithiophosphate (DTP) is classically used as a co-collector in sulphide mineral flotation, where xanthate-DTP mixtures have been shown to synergistically improve mineral flotation performance. Notwith
Jan 1, 2020
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Force measurement using atomic force microscopy (AFM) to investigate the surface chemistry of mineral flotation, M. Tian, W. Hu, L. Xie, X. Cui, W. Sun, Y. Hu, J.W. Drelich, H. Zeng, and Z. Gao
By J. W. Drelich, H. Zeng, L. Xie, X. Cui, Z. Gao, M. Tian, Y. Hu, W. Hu, W. Sun
Flotation is a mineral separation technology that uses the surface hydrophobic difference of valuable minerals and their associated gangue minerals to separate them. The flotation collector adsorbs on
Jan 1, 2020
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Factors influencing autonomously generated 3D geophysical spatial models APCOM 2021
By A. Melkumyan, M. Balamurali, J. Zigman
Understanding the contribution of geophysical variables is vital for identifying ore indicator regions. Both magnetometry and gamma-rays are used to identify the geophysical signatures of the rocks. D
Sep 1, 2021
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Analysis of pressure drop and hold-up during vertical transport of limestone slurry in lean phase and heterogeneous regime
By J. K. Pothal, S. Basu, R. Barik, P. K. Senapati, A. Dubey
The aim of this paper is to study the characteristics of limestone particles (size varies from 4 mm to 20 mm) during its transportation from open cast mines through pipes. The influence of four differ
Mar 4, 2025
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Comparison of the Effect of Particle Size on the Flotation Kinetics of a Low-Rank Coal Using Air Bubbles and Oily Bubbles
By C. Liu, G. Zhu, Y. Liao
"The effect of particle size on the flotation kinetics of a low-rank coal was compared using air bubbles and oily bubbles. Five kinetic models were applied to the data from the tests to derive the rel
Jan 1, 2017
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Parametric Estimation of Capital Costs for Establishing a Coal Mine: South Africa Case Study
By C. Musingwini, M. Mohutsiwa
"SynopsisCapital cost estimates are important in decisions on whether a project will be approved, mothballed, or abandoned. In South Africa, junior coal miners do not have extensive databases of histo
Jan 1, 2015