The role of mechanical activation on atmospheric leaching of a lateritic nickel ore

Basturkcu, Huseyin; Acarkan, Neşet; Gock, E.

doi:10.1016/j.minpro.2017.04.001

Cited by 43 publications

(13 citation statements)

References 25 publications

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“…It is known that the activation of nickel ores provides a sig nificant increase in the efficiency of atmospheric leaching. Sample treatment for 120 min followed by treatment with 30 % sulfuric acid at a ratio of liquid to solid phase = 1/2.5 al lows for yield of 80.6 % Ni and 84.5 % Co [14]. In the absence of mechanochemical activation of the ore and the same condi tions for the studied process, the same effect was obtained al ready at 480 min.…”

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confidence: 54%

Impact of duration of mechanochemical activation on enhancement of zinc leaching from polymetallic ore tailings

Голик¹,

Dmitrak²,

Brigida³

2020

Nauk. visn. nat. hirn. univ.

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Purpose. Determination the impact of duration of mechanochemical activation on enhancement of zinc leaching from poly metallic ore tailings to ensure the sustainable mining.Methodology. In experimental studies on the mechanical activation of geomaterial from the tails of Sadon polymetallic ores, the DESI11 disintegrator was used. As a solution for leaching, a mixture with a different ratio of mass concentrations of hydro chloric and sulfuric acids was used. In addition, the ratio of solid and liquid fractions was varied from 1/4 to 1/10 with process duration of 15 to 60 minutes. The results were processed by the standard LOESS method in combination with threedimensional interpolation of an incomplete data sample.findings. Polynomial dependences have been established that make it possible to calculate the degree of zinc extraction from the tail, depending on the parameters of the process of the leached solution, the ratio of the solid and liquid phases in the pulp and the duration of agitation leaching. originality. For the first time, the mechanism of surface transformation, size and location of zones with maximum leaching efficiency with small changes in the duration of mechanical activation of the pulp was clarified.Practical value. The revealed patterns can be used to optimize the parameters of agitation leaching by correlating the cost of energy consumption for increasing the duration of the process and unit costs for the lixiviants.

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confidence: 54%

Impact of duration of mechanochemical activation on enhancement of zinc leaching from polymetallic ore tailings

Голик¹,

Dmitrak²,

Brigida³

2020

Nauk. visn. nat. hirn. univ.

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“…Figure 5g shows that during the bioleaching process, the [Cu 2+ ] for the activated chalcopyrite increases with ball-milling in 120 min, followed by slight decrease until 180 min due to the agglomeration of the particles [15,48]. After 15 days bioleaching, the [Cu 2+ ] increased from 9.39% in the 0 min of mechanical activation to 87.41% in the 120 min of mechanical activation, and the copper leaching rate increased by about 78%.…”

Section: Bioleaching Behaviormentioning

confidence: 99%

Mechanical Activation on Bioleaching of Chalcopyrite: A New Insight

et al. 2020

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Mechanical activation as a means of accelerating the mineral dissolution may play an important role in chalcopyrite bioleaching. In the present work, the mechanical activation by ball-milling with 10 min, 30 min, 60 min, 90 min, 120 min and 180 min time periods of bioleaching of chalcopyrite was studied, and then evaluated by a Density Functional Theory (DFT) calculation. The results showed that the specific surface area increased sharply in the very beginning of mechanical activation and then increased slowly until the agglomeration of the particles occurred, while the chalcopyrite lattices increased with the mechanical activation. The reaction activity analyzed by cyclic voltammetry (CV) increased slowly in 30 min, increased quickly in the following 90 min, and then decreased, while the hydrophobicity analyzed by contact angles of the chalcopyrite after activation showed less of a change. The results showed that after 15 days of bioleaching, the Cu leaching by Sulfobacillus thermosulfidooxidans (S. thermosulfidooxidans) increased from 9.39% in the 0 min of mechanical activation to 87.41% in the 120 min of mechanical activation, and the copper leaching rate increased by about 78%. The DFT results provide solid proof that the activated chalcopyrite can be adsorbed more easily by cells with higher adsorption energies and stronger bonds.

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“…These processes are also used in nickel extraction from ores with high magnesium content. Disadvantages of pyrometallurgical processes such as high-grade ore requirement, metal loss with slag, high energy requirement, SO2 removal problems and low cobalt recovery rate increase the cost of nickel production [8]- [16]. Also, high amount of hydrocarbon fuels, coal, oil, naphtha and electricity are used in pyrometallurgical processes.…”

Section: Introductionmentioning

confidence: 99%

Hydrometallurgical Nickel and Cobalt Production From Lateritic Ores: Optimization and Comparison of Atmospheric Pressure Leaching and Pug-Roast-Leaching Processes

Çoban

Başlayıcı²,

Buğdaycı

et al. 2021

Acta Metall Slovaca

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Corresponding to the technological developments, production and consumption of nickel have increased greatly over time due to its unique mechanical and chemical properties. Therefore, the production of nickel will always keep its importance. The availability of laterite ores, which are oxide type ores, is 86% of the nickel reserves on the Earth, and the processes used in the production of nickel from sulfide type ores have negative environmental effects. Therefore, recovery of nickel from lateritic ores has become increasingly important in recent years. In this study, the aim was to determine the optimum parameters of nickel and cobalt production from limonite type lateritic nickel ores, which were taken from Manisa Caldag region of Turkey, using atmospheric pressure sulfuric acid leaching and pug-roast-leach process. When the results obtained in these processes were compared, it was found that the Ni leaching efficiency is nearly 8% higher and iron leaching efficiency (contamination) is nearly 4% lower in the pug-roast-leach process. Furthermore, the pug-roast-leach process was completed in 33% lower time compared to the atmospheric pressure sulfuric acid leaching process.

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The role of mechanical activation on atmospheric leaching of a lateritic nickel ore

Cited by 43 publications

References 25 publications

Impact of duration of mechanochemical activation on enhancement of zinc leaching from polymetallic ore tailings

Impact of duration of mechanochemical activation on enhancement of zinc leaching from polymetallic ore tailings

Mechanical Activation on Bioleaching of Chalcopyrite: A New Insight

Hydrometallurgical Nickel and Cobalt Production From Lateritic Ores: Optimization and Comparison of Atmospheric Pressure Leaching and Pug-Roast-Leaching Processes

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