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2012-3-2Currently the preferred method for large-scale production of solution-processable graphene is via a nonconductive graphene oxide GO pathway, which uncontrollably cuts sheets into small pieces andor introduces nanometer-sized holes in the basal plane. These structural changes significantly decrease some of graphenes remarkable electrical and mechanical properties.
ramics and insulation materials9-11. Microwave en-ergy is an efficient and clean energy source. In this pa-per, microwave carbothermal reduction technique is adopted to carry out direct reduction of red mud with carbon, investigating the recovery effect of iron, and ISSN 0543-5846 METABK 571-2 75-78 2018
The main abiotic oxidation product was elemental sulfur attached to the iron mineral surface, which indicates that direct contact between microorganisms and ferrihydrite is necessary to maintain the iron reduction process. Polysulfides were not detected in the liquid phase.
The papers in this volume give the reader focused information on the important extractive metallurgy unit operations of drying, roasting, and calcining
2015-5-18This paper aims at reviewing literature on the occurrence of phosphorus in iron ores from the mines around the world. The review extends to the phosphorus removal processes of this mineral to meet the specifications of the steel industry. Phosphorus is a contaminant that can be hard to remove ...
Iron ore with high hydroxyl content such as goethit is widely spread in Indonesia. Such iron ore is not used as feed in ironmaking industry. However due to limitation of primary iron ore reserve such material is an option to substitute the conventional iron ore. Unfortunately the characteristic of iron ore with high hydroxyl content is totally different to conventional iron ore.
2019-12-19Sintering or frittage is the process of compacting and forming a solid mass of material by heat1 or pressure2 without melting it to the point of liquefaction. Sintering happens naturally in mineral deposits or as a manufacturing process used with metals, ceramics, plastics, and other materials. The atoms in the materials diffuse across the ...
2017-1-11Microwave-synthesized freestanding iron-carbon nanotubes on polyester composites of woven Kevlar fibre and silver nanoparticle-decorated graphene. Sci. Rep. 7 , 40386 doi 10.1038srep40386 2017.
The depth reduction of oolite hematite and direct metallization has become a new research hot spot. The growth of the metallic iron particles is affected by both interface reaction velocity and diffusion speed in the deep reduction process of the oolitic hematite. The metallic iron particles is developed,
titic FeIII is similar in magnitude to that with FeIII oxide minerals and is dependent upon the mineral surface area available. IronIII bound in clay minerals should be considered an important electron acceptor supporting the growth of bacteria in soils or sedimentary environments. Microbial FeIII reduction has been established as an im-
2007-3-6The emission of SO2 from industrial flue gas contributes to a large part of atmospheric pollution. With the more stringent regulations for SO2 emission, more efficient technologies for SO2 removal have to be developed. In the present work, we for the first time employed microwave plasma to reduce SO2 with three carbons activated carbon, charcoal, and coke.
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Magnetic separation of iron in rare-earth tailings was achieved by magnetizing roast process with coal as reductant. Effects of the temperature, carbon to oxygen ratio, and cooling type on magnetic susceptibility and composition of rare-earth tailings were investigated. The results show that roast conditions with the temperature of 650 C, carbon to oxygen ratio of 3.85, and holding time of 2 ...
2018-6-7phosphorus of iron ore, but would not reduce the recovery of iron mineral 25. In this study, microwave processing and acid leaching were applied to improve the liberation of oolitic hematite, and the effect of the method on grinding, liberation, the dephosphorization ratio of oolitic hematite and the following magnetic separation was ...
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Current methodologies for the extraction of tantalum and niobium pose a serious threat to human beings and the environment due to the use of hydrofluoric acid HF. Niobium and tantalum metal ...
The ferrous removal process after carbothermic reduction of chromite fines with microwave heating combined with leaching was investigated. Under the following conditions Reaction temperature 1150C , Reaction time 40min, Semi coke ratio 12 , the iron content of the reduction product 13.05 . Metallization achieved was 52.7.
2014-5-15Space weathering simulations through controlled growth of iron nanoparticles on olivine ... was achieved by direct mineral or glass reduction Allen et al., 1993, short duration laser ... or microwave irradiation Tang et al., 2012 on various silicate minerals, meteorites or lunar rocks. Since then, laser irradiation together with ion ...
Minerals ISSN 2075-163X CODEN MBSIBI is an international peer-reviewed open access journal of natural mineral systems, mineral resources, mining, and mineral processing. Minerals is published monthly online by MDPI. Open Access - free for readers, with article processing charges APC paid by authors or their institutions.
Reductions in mineral amounts following boiling were observed for phosphorus, magnesium, sulfur, zinc, manganese, and iron. There was no difference between the leaching and boiling treatment and the boiling treatment. In addition, mineral levels in tubers of 6 North American potato cultivars are reported.
2018-9-4to the reduction of process residues and, in addition to these advantages, the equipment allows a good heating control, not requiring direct contact with the materials7,8. According to a large microwave heating applications review by Khaled et al. 2018 11 and Haque 1999, materials behave in three ways in front of microwave radiation they ...