Abstract. In this work, the thermal decomposition of a goethite concentrate from an iron ore concentration plant was studied in order to develop an economic process of preparing porous hematite as an effective adsorbent for the treatment of wastewater containing heavy metals.
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The process, already applied on other materials, is applied for the first time on P-Goethite in order to utilise it in iron making. This would liberate extensive areas now required as waste dumps that also constitute a possible environmental hazard due to the presence of harmful elements like cadmium and arsenic, in addition to lead and zinc.
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The obtained goethite particles were annealed at different temperature for 2 h (100, 150, 200, 250, 300, 350, 400, 500, 600, 700, 800 °C) and retained for further characterization. The goethite labeled as G25 and the heated goethite labeled as G100, where G denotes goethite and the number denotes the thermal treatment temperature.
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Learn how to understand and optimise the effects of goethite, a diverse and reactive iron ore mineral, on mine planning, sintering, quality assurance …
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The most common element that makes up rock formations is iron, which accounts for about 5 percent of the earth's crust. India alone has a significant reserve of iron ore in the world [].The two most common iron minerals, hematite and magnetite, and are widely exploited for commercial applications, particularly steel production …
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In this paper, transformations of synthetic goethite and brown goethite ore (Kerch iron ore basin) under oxidative (in air) and reducing (mixed with 4% of starch) …
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Researches have investigated the changes of iron ores as a function of temperature by thermal processing (Gialanella et al., 2010, Gilkes and Ruan, 1995, McCann et al., 2004, O'Connor et al., 2006, Strezov et al., 2011, Valix and Cheung, 2002, Yu and Qi, 2011).The chemical and structural changes of iron ore samples versus the …
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The present work shows the results of X-ray diffraction (XRD), Fourier transform infrared (FTIR), and thermal analysis of untreated (RM nt) and acid-treated red mud (RM a), a bauxite ore-processing waste, exchanged with Pb 2+, Cd 2+, and Zn 2+ cations. These studies were performed in order to investigate the changes in the sorbent …
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Resource utilization of municipal solid waste incineration fly ash in iron ore sintering process: A novel thermal treatment. Author links open overlay panel Guojing Wong a, Xiaohui Fan a, Min Gan a, Zhiyun Ji a, Hengdi Ye b, Zhian Zhou a b, Zhaocai Wang a b. ... thermal treatment is thought to be superior and the main reasons are as …
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In this work, the thermal decomposition of a goethite concentrate from an iron ore concentration plant was studied in order to develop an economic process of preparing porous hematite as an ...
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To reduce the proportion of high energy consumption and pollution processes such as sintering and pelletizing, and to make full use of the waste heat resources of steel plant, a lump ore pre-heating treatment is proposed. The mineralogical properties of mainstream lump iron ores were first analyzed using chemical analysis, …
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A sample of limonitic nickel ore was characterized by XRD, SEM-EDS, and ICP-OES techniques. The Rietveld refinement method showed that the main mineral …
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The iron recovery was 66.2%, and iron concentrates with an iron grade of 63.2% were produced from iron ore with an iron grade of 49.02% (Nayak et al., 2019). In this study, the ideal conditions of a roasting temperature of 850 °C, a roasting period of 30 min, a magnetic intensity of 3000 gausses, and a biomass/biochar dose of 20 wt% led to …
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For the reduction of goethite ore with pine sawdust, the optimal reaction time was 30 min (Wu et al., 2012). 4. Conclusions. Thermally-induced phase transformations of synthetic goethite and brown goethite ore (Kerch iron ore basin) under oxidative and reducing conditions led to changes in the crystal structure and magnetic properties of the ...
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This study deals with some microstructural and crystallographic aspects of the thermally induced transformation of goethite (α-FeOOH) into hematite (α-Fe2O3), occurring at about 300 °C. Powder specimens of goethite have been annealed in air at different temperatures, ranging from 200 °C up to 1,000 °C. The resulting products have …
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Semantic Scholar extracted view of "Thermomagnetic properties of the goethite transformation during high-temperature treatment" by V. Ponomar. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 220,302,696 papers from all fields of science. Search ...
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It should be added that segregation of laterite ores prior the flotation process has shown some improvement in upgrading nickel. The segregation process relies on the addition of calcium chloride or sodium chloride and carbon allowing the formation of nickel and iron chlorides at temperatures between 900 and 1150 °C. Iwasaki et al., (1961) and …
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[30] [31][32] Processing goethite-rich iron ores using reduction roasting followed by lowintensity magnetic separation can obtain an iron concentrate with a total iron grade of $66.6% and iron ...
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The work presented here investigates thermal deterioration of iron ore particles during thermal processing of two types of iron ores, goethite and hematite.
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In this work, the thermal decomposition of a goethite concentrate from an iron ore concentration plant was studied in order to develop an economic process of preparing porous hematite as an effective adsorbent for the treatment of wastewater containing heavy metals. This study was performed by means of the measurements of X …
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TGA/ DTA (Thermo-gravimetric analysis/ Differential thermal analysis) (Make- NETZSCH, Model- STA 409 C/CD) of the iron ore fines (pellet feed) were conducted to determine the regions of decomposition of the chemically bonded water. 99.0 mg of the iron ore fines were heated up to 1100 °C with heating rate 10 °C/min in inert …
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Strezov et al. investigated the thermal deterioration of two types of iron ore, goethite and hematite, during thermal processing. The goethite would undergo decomposition reaction near 300 • C ...
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The removal of phosphorus from iron ore using a low temperature heat treatment with additives, followed by alkaline or water leaching, has been tested by Fisher-White et al., (2009), with phosphorus being lowered from 0.145–0.075%.
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Goethite is one of the important ferruginous mineral in lateritic rock, lateritic iron ore and important part of the iron ore slimes. It occurs as vitreous goethite and …
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DOI: 10.1016/J.TCA.2013.06.027 Corpus ID: 93726050; Thermal treatment of natural goethite : thermal transformation and physical properties @article{Liu2013ThermalTO, title={Thermal treatment of natural goethite : thermal transformation and physical properties}, author={Haibo Liu and Tianhu Chen and …
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Hence, reductive and oxidative roasting of low-grade iron ore of the Ingulets deposit result in magnetic and chemical modifications that can be considered as a promising preparatory technique for ...
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In this paper, the thermomagnetic analysis and magnetometry were used to study the thermal transformations of synthetic goethite and brown goethite ore (Kerch iron ore basin) under oxidative and reducing conditions.
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In this paper, chemical and mineral transformations of a goethite ore were studied by dehydroxylation, reduction roasting in CO and CO 2 gas mixtures, and …
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The behaviour of jarosite and goethite in thermal treatment is quite different, furthermore the various types of jarosites show different properties. ... An economically and ecologically feasible process for the treatment of iron precipitation residues has to be designed, robust and insensitive against fluctuations regarding the content of ...
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