Structural changes in olivine (Mg, Fe)2SiO4 mechanically activated in high-energy mills

Baláž, Peter; Turianicová, Erika; Fábian, Martin; Kleiv, Rolf Arne; Briančin, Jaroslav; Obut, Abdullah

doi:10.1016/j.minpro.2008.04.001

Cited by 61 publications

(36 citation statements)

References 20 publications

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“…soft-mechanochemical reactions between hydrated oxides. 631 Extraneous water may be present in various forms from vapour to solid-liquid pastes (as in kneading or pug milling 635,636 ) and slurries (wet milling 634 ).…”

Section: Role Of Water In Mechanochemistrymentioning

confidence: 99%

“…chalcopyrite, tetrahedrite, enargite, pentlandite, etc. ), 634,694 Al-oxyhydroxide minerals (gibbsite, boehmite), [701][702][703] alumina, 638,651,699,[704][705][706][707] calcium carbonate, 708 olivine, 636 kaolinite, 635 wollastonite, 645 coal, 709 pigments, 700 bauxite, 710-715a cement 715b and waste materials (slag, red mud). 647,716 Fritsch 704 and Oberacker et al 707 observed that while undergoing wet milling a change of phase composition from a-alumina to an aluminum tri-hydroxide phase can occur.…”

Section: Role Of Water In Mechanochemistrymentioning

confidence: 99%

“…701 Baudet et al 635 observed that delamination and transverse breakage occur sequentially during stirred media milling and simultaneously in high-energy kneading in a pug mill. Baláž et al 636 compared the mechanical activation of olivine in attritor and planetary mills. It can be inferred from the presented data that for the same amount of energy input (2 kW h kg À1 ), the surface area and percentage of crystalline fraction remaining was 34 m 2 g À1 and 13% for attrition milling and 4.7 m 2 g À1 and 37.4% for planetary milling.…”

Section: Role Of Water In Mechanochemistrymentioning

confidence: 99%

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Hallmarks of mechanochemistry: from nanoparticles to technology

et al. 2013

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The aim of this review article on recent developments of mechanochemistry (nowadays established as a part of chemistry) is to provide a comprehensive overview of advances achieved in the field of atomistic processes, phase transformations, simple and multicomponent nanosystems and peculiarities of mechanochemical reactions. Industrial aspects with successful penetration into fields like materials engineering, heterogeneous catalysis and extractive metallurgy are also reviewed. The hallmarks of mechanochemistry include influencing reactivity of solids by the presence of solid-state defects, interphases and relaxation phenomena, enabling processes to take place under non-equilibrium conditions, creating a well-crystallized core of nanoparticles with disordered near-surface shell regions and performing simple dry time-convenient one-step syntheses. Underlying these hallmarks are technological consequences like preparing new nanomaterials with the desired properties or producing these materials in a reproducible way with high yield and under simple and easy operating conditions. The last but not least hallmark is enabling work under environmentally friendly and essentially waste-free conditions (822 references).

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Section: Role Of Water In Mechanochemistrymentioning

confidence: 99%

Section: Role Of Water In Mechanochemistrymentioning

confidence: 99%

Section: Role Of Water In Mechanochemistrymentioning

confidence: 99%

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Hallmarks of mechanochemistry: from nanoparticles to technology

et al. 2013

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“…The advantage of this approach is that surface area can be related directly to dissolution rates. There are a limited number of studies that investigate energy requirements for surface area generation in calcium or magnesium silicates (Baláz et al, 2008;Haug et al, 2010), which primarily focus on high energy grinding. There is a need to expand the dataset for low energy grinding (shaded region in Fig.…”

Section: Comminutionmentioning

confidence: 99%

The potential of enhanced weathering in the UK

Renforth¹

2012

International Journal of Greenhouse Gas Control

192

191

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a b s t r a c tEnhanced weathering is the process by which carbon dioxide is sequestered from the atmosphere through the dissolution of silicate minerals on the land surface. The carbon capture potential of enhanced weathering is large, yet there are few data on the effectiveness or engineering feasibility of such a scheme. Here, an energy/carbon balance is presented together with the associated operational costs for the United Kingdom as a case study. The silicate resources are large and could theoretically capture 430 billion tonnes (Gt) of CO 2 . The majority of this resource is contained in basic rocks (with a carbon capture potential of ∼0.3 tCO 2 t −1 rock). There are a limited number of ultrabasic formations (0.8 tCO 2 t −1 rock) with a total carbon capture potential of 25.4 GtCO 2 . It is shown that the energy costs of enhanced weathering may be 656-3501 kWh tCO 2 −1 (net CO 2 draw-down, which accounts for emissions during production) for basic rocks and 224-748 kWh tCO 2 −1 for ultrabasic rocks. Comminution and material transport are the most energy intensive processes accounting for 77-94% of the energy requirements collectively. The operational costs of enhanced weathering could be £44-361 tCO 2 −1 ($70-578 tCO 2 −1 ) and £15-77 tCO 2 −1 ($24-123 tCO 2 −1 ) for basic and ultrabasic rocks respectively. Providing sufficient weathering rates full exploitation of this resource is not possible given the environmental and amenity value of some of the rock formations. Furthermore, the weathering rate and environmental impact of silicate mineral application to the land surface is not fully understood, and further investigation in this area is required to reduce the uncertainty in the estimated costs presented here.

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“…Mechanical activation via high-energy attrition grinding increases the surface area of minerals, and introduces imperfections into the crystal lattice (Baláž et al 2008). Studies have focused on comparing individual mineral (i.e.…”

Section: Pre-treatmentmentioning

confidence: 99%

A Review on Integrated Mineral Carbonation Process in Ultramafic Mine Deposit

Hitch

2017

GREE

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Dramatical increase in the CO2 concentration in the atmosphere has led to the climate change, which poses a significant threat to human life on Earth. CO2 sequestration via mineral carbonation is the one of the most effective method for mitigating global warming, and is the only way that could store CO2 permanently. In recent years, integrating mineral carbonation via ultramafic mine deposit has received significant attention due to its high potentiality towards commercial application. This review compiles the work conducted by various researchers over the last few years on integrated mineral carbonation processes in mining industry, which use the mine waste materials as CO2 feedstock for mineral carbonation. This paper initially introduces the basic theory of mineral carbonation, with a brief description of various techniques that enhance the rate of mineral carbonation. The enhanced mineral carbonation strategies include pre-treatment of feedstock by thermal, chemical and mechanical activation, and carbonation in a direct or indirect carbonation routes under gas/solid phase or aqueous phase. This paper then introduces the scope of application of integrated mineral carbonation. This includes the types of mine suitable for integrated mineral carbonation, the properties of mine waste materials preferable for CO2 sequestration, and the worldwide locations potentially viable for integrated mineral carbonation. Moreover, this paper critically reviews and discusses the integrated mineral carbonation process in mining industry. The integrated mineral carbonation processes include modified passive carbonation techniques at tailing dams, and ex-situ carbonation routes using fresh tailings. The focus of the discussions is the role of reaction condition on the carbonation efficiency of mine waste with various mineralogy, and the drawback of each integrated mineral carbonation process. All the discussions lead to the suggestions on the technology improvement in the integrated mineral carbonation process. Finally, this paper reviews the economical assessments on the existing integrated mineral carbonation process. Literature to date indicates that the value-add by-products (i.e. recovered metals, valuable carbonated products) play an important role in commercialization of an integrated mineral carbonation process.

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Structural changes in olivine (Mg, Fe)2SiO4 mechanically activated in high-energy mills

Cited by 61 publications

References 20 publications

Hallmarks of mechanochemistry: from nanoparticles to technology

Hallmarks of mechanochemistry: from nanoparticles to technology

The potential of enhanced weathering in the UK

A Review on Integrated Mineral Carbonation Process in Ultramafic Mine Deposit

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