Recovering molybdenite from ultrafine waste tailings by oil agglomerate flotation

Fu, Jiangang; Kaida, Chen; Wang, Hui; Guo, Chao; Wei, Liang

doi:10.1016/j.mineng.2012.07.006

Cited by 53 publications

(14 citation statements)

References 33 publications

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“…Molybdenite often occurs with other sulfide minerals, including pyrite and chalcopyrite (e.g., in sediments associated with waste-water effluents from the concentration plants of Sarcheshmeh Cu mine, SE Iran [31]). The proportion of molybdenite in mine wastes varies from traces [32,33,46] to approximately 1% of the total mineral composition [31,48]. For example, Xu et al [49] used X-ray diffraction (XRD) to show that molybdenite was the second most abundant sulfide (<1% of total minerals) after pyrite (<3% of total minerals) in tailings in the Lanjiagou mining area, China.…”

Section: Mineralogy Of Mo In Mine Wastesmentioning

confidence: 99%

“…A Mo oxide with an MoO 3 composition typical of molybdite was also found in minor amounts (1.92% of the total Mo-bearing mineral composition, with the remaining 98.08% as Mo sulfide) in ultrafine tailings from an obsolete molybdenite reservoir in Zhejiang province, China [48]. It has been proposed that molybdate can be taken up in a wide range of secondary minerals, including kornelite, magnesiocopiapite, coquimbite and hydronium jarosite in mine tailings [31,33].…”

Section: Mineralogy Of Mo In Mine Wastesmentioning

confidence: 99%

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Geochemistry, Mineralogy and Microbiology of Molybdenum in Mining-Affected Environments

Frascoli

Hudson‐Edwards

2018

Minerals

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Abstract:Molybdenum is an essential element for life, with growing production due to a constantly expanding variety of industrial applications. The potentially harmful effects of Mo on the environment, and on human and ecosystem health, require knowledge of Mo behavior in mining-affected environments. Mo is usually present in trace amounts in ore deposits, but mining exploitation can lead to wastes with very high Mo concentrations (up to 4000 mg/kg Mo for tailings), as well as soil, sediments and water contamination in surrounding areas. In mine wastes, molybdenum is liberated from sulfide mineral oxidation and can be sorbed onto secondary Fe(III)-minerals surfaces (jarosite, schwertmannite, ferrihydrite) at moderately acidic waters, or taken up in secondary minerals such as powellite and wulfenite at neutral to alkaline pH. To date, no Mo-metabolising bacteria have been isolated from mine wastes. However, laboratory and in-situ experiments in other types of contaminated land have suggested that several Mo-reducing and -oxidising bacteria may be involved in the cycling of Mo in and from mine wastes, with good potential for bioremediation. Overall, a general lack of data is highlighted, emphasizing the need for further research on the contamination, geochemistry, bio-availability and microbial cycling of Mo in mining-affected environments to improve environmental management and remediation actions.

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Section: Mineralogy Of Mo In Mine Wastesmentioning

confidence: 99%

Section: Mineralogy Of Mo In Mine Wastesmentioning

confidence: 99%

Geochemistry, Mineralogy and Microbiology of Molybdenum in Mining-Affected Environments

Frascoli

Hudson‐Edwards

2018

Minerals

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“…However, understanding the initial fresh state microstructure of pastes is very difficult, and the difficulty in in situ monitoring of microstructures lies in the high concentration, hydration, low transmission, and vulnerability [20,21]. erefore, most of the current understandings of the microstructure of the paste come from conjectures or limited experiments, especially when the sample is subject to shearing (i.e., mixing and pumping) [22]. e paddle rheometer test method is the most commonly used one in the paste rheology testing.…”

Section: Introductionmentioning

confidence: 99%

Using Coupled Rheometer-FBRM to Study Rheological Properties and Microstructure of Cemented Paste Backfill

Wang

Yang

et al. 2019

Advances in Materials Science and Engineering

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Rheological properties, such as the yield stress, viscosity, and thixotropy, are related to the microstructure of cemented paste backfill (CPB). To highlight the relationship, two instruments were combined to measure the changes in the microstructure and the rheological properties of CPB simultaneously. In this way, the particle/agglomerate size distribution characterized by the focused beam reflectance measurement (FBRM) and the rheological factors measured by the rheometers could be directly linked. The results show that when under shearing, the intrinsic network structure of CPB responds to the shear-induced stresses with the interference of interparticle forces, leading to changes in the rheological behavior. Shear thinning can be found in CPB suspensions with a microstructure that is either loose interconnection or random. With an increase in the shear rate, random collisions among particles become organized in the flow, lowering the yield stress and viscosity. However, when the shear rate exceeds a certain threshold value, the rheological parameters change as a result of shear thickening. The results of this study contribute to better understanding of the complex rheological behavior of CPB.

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“…Every year, more than 14 billion tons of tailings are discharged (Jones and Boger, 2012) and most of these tailings cannot be disposed of in a timely fashion. Typical treatment methods of tailings are mineral recovery by reprocessing (Jiangang et al, 2012;Yang et al, 2015) and dry discharge and reclamation (Lin et al, 2012;Tordoff et al, 2000). They can also be used as fillers in mineral areas (Guo et al, 2014;Jiang et al, 2016;Wu et al, 2015) and in the synthesis of building materials (Qiu et al, 2011;Ren et al, 2015;Zhao et al, 2012), which provides a good way of the disposal/recycling of tailings.…”

Section: Introductionmentioning

confidence: 99%

The water resistance of cement mortars prepared with reverse flotation tailings

Liu¹,

Wang²,

Zhao³

et al. 2017

Magazine of Concrete Research

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Silica mineral tailings from reverse flotation are a cause of great environmental concern. In this work, eco-friendly cement mortars were prepared using reverse flotation tailings (RFT). The experimental results showed that the addition of RFT had no influence on the compressive strength of cement mortars and, according to results of water absorption and contact angles, cement mortars with RFT were more hydrophobic than ordinary cement mortars. The water resistance of mortar can thus be greatly improved through the addition of RFT, and this is attributed to the hydrophobicity of the RFT surfaces. This hydrophobicity can slow down the movement of water molecules in the pores of mortars, resulting in less water content of cement mortars per unit area and per unit time. Better water resistance is beneficial for building materials in humid environments and the preparation of eco-friendly mortars with high water resistance can be achieved by using RFT.

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Recovering molybdenite from ultrafine waste tailings by oil agglomerate flotation

Cited by 53 publications

References 33 publications

Geochemistry, Mineralogy and Microbiology of Molybdenum in Mining-Affected Environments

Geochemistry, Mineralogy and Microbiology of Molybdenum in Mining-Affected Environments

Using Coupled Rheometer-FBRM to Study Rheological Properties and Microstructure of Cemented Paste Backfill

The water resistance of cement mortars prepared with reverse flotation tailings

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