Utilization of sulphidic tailings from gold mine as a raw material in geopolymerization

Kiventerä, Jenni; Gołek, Łukasz; Yliniemi, Juho; Ferreira, Victor; Deja, Jan; Illikainen, Mirja

doi:10.1016/j.minpro.2016.02.012

Cited by 113 publications

(69 citation statements)

References 23 publications

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“…(4) Figure 4 presents the compressive stress-strain curve, from which it can be seen that the backfilling body exhibited high elasticity and plasticity, allowing it to efficiently bear the weight of the stopes after breakage [10]. This also suggests that a mixture of aeolian sand and tailings can be provided as backfilling material.…”

Section: Analysis Of Resultsmentioning

confidence: 99%

“…The oxides that cover the surface of the backfilling aggregates were removed through sand washing machine before sampling to allow the physical properties and chemical composition to be accurately measured. The chemical composition was measured by the titrimetric method, while the main physical properties were measured using specific methods and instruments [9,10]. The chemical composition, main physical properties, and particle size distribution are listed in Tables 1-3.…”

Section: Physicochemical Propertiesmentioning

confidence: 99%

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Cemented Backfilling Technology of Paste-Like Based on Aeolian Sand and Tailings

2016

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Aeolian sand, tailings, and #32.5 Portland cement were used to produce backfilling aggregate, and physicochemical evaluations and proportioning tests were conducted. It is revealed that a mixture of aeolian sand and tailings can be used as a backfilling aggregate for the complementarities of their physicochemical properties; e.g., high Al 2 O 3 content in the aeolian sand and CaO content in the tailings, coarse particles of aeolian sand and fine particles of tailings, etc. In addition, the optimal backfilling aggregate was shown to have a mass fraction of 72%-74%, a cement-sand ratio of 1:8, and an aeolian sand proportion of 25%. Furthermore, viscometer tests were used to analyze the rheological characteristics, and the slurry in these optimized proportions exhibited shear thinning phenomena with an initial yield stress, which belongs to paste-like-a cemented backfilling slurry with a higher mass fraction than a two-phase flow and better flowability than a paste slurry. Finally, the application of this backfilling technology shows that it can not only realize safe mining, but also bring huge economic benefits, and has some constructive guidance for environmental protection.

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Section: Analysis Of Resultsmentioning

confidence: 99%

Section: Physicochemical Propertiesmentioning

confidence: 99%

Cemented Backfilling Technology of Paste-Like Based on Aeolian Sand and Tailings

2016

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“…It is proven than alkali activation can considerably improve the mechanical performances of mine tailings [16]. This work has focused on the effects of several When comparing the fresh and weathered tailings it shall be taken into account the fact that preparation conditions are not totally identic.…”

Section: Discussionmentioning

confidence: 99%

Effects of Preparation’s Parameters on Stabilization of Sabodala Gold Mine Tailings: Comparison of Fresh and Weathered Materials

Dia¹,

Faye²,

Keinde³

et al. 2017

GEP

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The Sabodala gold mine tailings were stabilised using geopolymerization technics in order to improve their mechanical properties in general for a reuse as building materials for local communities. The effect of several preparation parameters on the compressive and tensile strength of the stabilised tailings has been studied to define their optimums. For each formulation, all parameters are kept constant and only one is variable. The prepared samples are then tested for compressive and tensile strength to see how the variable parameter impact on these properties. The same work was carried out for the fresh tailings and for the weathered one to see whether they behave differently and if they need different treatment. The results show that for most of parameters, there is an optimal value on either side of which compressive and tensile strength decrease. Except for few parameters, the fresh and the weathered tailings have a similar behaviour with regards to trends of their mechanical properties with changing preparation conditions. In addition to the similarity of weathered and fresh tailings mechanical characteristics following their stabilization by geopolymerization, this work has proved the considerable effects of the preparation's parameters.

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“…Until now, the studies on recycling Cu from the solid wastes using MFCs have been scarcely reported [42][43][44][45]. Moreover, the water pollution and ecological destruction caused by the traditional hydrometallurgical methods have plagued the development in the mining industry [40,[46][47][48][49]. In this study, the bioleaching technique and a dual-chamber MFC were assembled to achieve the extraction and recovery of Cu from the secondary copper tailings at same time.…”

Section: Introductionmentioning

confidence: 99%

Microbial fuel cells coupled with the bioleaching technique that enhances the recovery of Cu from the secondary mine tailings in the bio‐electrochemical system

Huang

Liu

Zhang

2019

Env Prog and Sustain Energy

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Improper management of dumped tailings not only causes a potential waste of resources but also poses a direct threat to the lives of local residents. A dual‐chamber microbial fuel cell (MFC) combining with the bioleaching technique was used in the study to extract Cu from the secondary mine tailings at a fed‐batch scale. A mixed culture of acidophilic bacteria was enriched and isolated from the acidic drainage in a copper mine. The effects of the pulp densities and initial pH on both the bio‐electronic performances and the recoveries of Cu on bio‐electrochemical platform were comparatively investigated. An appropriate increase in the pulp densities and a suitable decrease in the initial pH facilitated increases in power generations and enhanced the recoveries of Cu from the tailing samples. The maximum power density of 30.54 mW/m2 was achieved in the coupling system with the coulomb efficiency of 4.52%, and the internal resistance of 166.58 Ω being synchronously obtained. Correspondingly, the highest recovery efficiency of Cu of 78.72% was got in the two‐dimensional tests under conditions including the pulp density (w/v) of 20% and the initial pH of 1.8. The electrochemical reduction and the chemical precipitation in MFCs were confirmed as two of main mechanisms in obviously influencing the recovery of Cu. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13146, 2019

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Utilization of sulphidic tailings from gold mine as a raw material in geopolymerization

Cited by 113 publications

References 23 publications

Cemented Backfilling Technology of Paste-Like Based on Aeolian Sand and Tailings

Cemented Backfilling Technology of Paste-Like Based on Aeolian Sand and Tailings

Effects of Preparation’s Parameters on Stabilization of Sabodala Gold Mine Tailings: Comparison of Fresh and Weathered Materials

Microbial fuel cells coupled with the bioleaching technique that enhances the recovery of Cu from the secondary mine tailings in the bio‐electrochemical system

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