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Schematic diagram of the desulfurization flotation of high-sulfur bauxite 2.2.2. Characterization method X-ray diffraction (XRD) of the sample was run on the D8 Advance (Bruker, DE) with Cu Kα ...
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The aim of this work was to elucidate if these predictive models could predict column flotation performance for the desulfurization of the iron ore concentrate with high …
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The present work aims to study the feasibility of sulfur removal from Soork iron ore down to lower than 0.1% using the flotation process. According to the characterization analysis, the ore ...
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According to the microbial flotation desulfurization method, Rhodotorula mucilaginosa (R.mucilaginosa) can effectively change the surface characteristics of coal, increase the hydrophobicity of coal and enhance the flotation selectivity.Therefore, in this study, T. ferrooxidans and R. Mucilaginosa are used to study the effects of factors such as particle size, …
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Abstract Desulfurization of high sulfur bauxite is an important issue in Bayer alumina production. In this study, by using two anionic sulphydryl collectors (HX, HD) as mixed collectors (PYDH), the selectivity of flotation separation between pyrite and diaspore was improved, thereby reducing the sulfur content of high sulfur bauxite and ultimately meeting the production requirements of …
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iron ore used in the pelletizing plant was carried out in the fourth line of the Gol-e-Gohar Complex. Two methods were examined for desulfurization process using reverse floatation: 1) grinding ...
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Bauxite is one of the main raw materials in the alumina industry. Fine high-sulfur bauxite flotation desulfurization is a great challenge presently. This study aims to synthesize nanoparticle collectors (NPCs) by emulsion polymerization to improve the abovesaid flotation desulfurization process. The physicochemical properties of high-sulfur bauxite were analyzed, …
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Application of flotation desulfurization and chemical oxidation method can control the iron content of the alumina product and retard equipment corrosion, but there are problems of the sulfur balance and low alumina extraction efficiency. To clarify the reasons for this, the changes of chemical compositions during the Bayer process as well as ...
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Thailand 1.6 1.6 NA United States - - 1400 Vietnam 0.22 0.1 22000 Total 129 130 120000 Table 1.2. Global demand for REE, data adapted from (Krishnamurthy, et al., 2005). ... ILs have …
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The present work aims to study the feasibility of sulfur removal from Soork iron ore down to lower than 0.1% using the flotation process. According to the characterization analysis, the ore ...
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The proper feed for the pelletizing plant must have iron and the Blaine number more than 67 % and 1900 cm 2 g-1 and sulfur content less than 0.1 %, respectively.
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The reverse flotation of the iron ore with etheramine collector is significantly impacted when the iron-bearing silicates and the kaolinite are present in the silicates gangue …
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Flotation is the most commonly used process for desulfurization of iron concentrates in iron beneficiation plants. The current study deals with improving the metallurgical performance of the ...
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Various studies have been increasingly performed on the reduction of sulfur content of iron ores and concentrates. ... and latest innovations in sulfur removal using flotation are reviewed and the development of leaching and bioleaching techniques for sulfur reduction is introduced; following the development of thermal decomposition, physical ...
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In this study, the desulphurization of iron ore concentrate using reverse flotation was investigated. In this paper first, behavior of the flotation of both pure – pyrite and iron oxides-pyrite ...
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1. Introduction. As the main type of iron ore, magnetite is the main raw material in the steel industry, which has a strict demand for its sulfur content [1], [2], [3].With the continuous improvement of the quality requirements of iron concentrate, effective desulfurization is of great significance to improve the utilization rate of iron ore resources [4], [5], [6].
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spent copper tailing after 10 h flue gas desulfurization.
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Flotation Desulfurization Tests The flotation desulfurization tests were carried out in a single flotationcellof1.5L.Ineachtestrun,bauxitewitha30%pulp densitywasgroundto78 ± 2% < 0.075 mm,andloadedinto the flotation tank. The pulp pH was adjusted to the target pH value, and then the regulator, activator, collector, and frother were added ...
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the desulfurization of iron concentrate [10]. Nakhaei and Irannajad studied the desulfurization of iron ore tailing of the Gol-e-Gohar Complex using gravity and magnetic separation followed by reverse flotation. A final concentrate with the iron content of 63.7 % and sulfur content of 0.08 % was achieved [11].
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This paper reviews the industrial practices and fundamental research surrounding iron ore flotation. The advantages and disadvantages of …
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Most impurities are usually removed by cleaning and re-cleaning the concentrate. To investigate the feasibility of re-flotation, three flotation experiments were performed under …
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Both pyrite types showed high recoveries at pH 4.75 to 8, but in the flotation of iron oxides-pyrite, partial depression was found in the pH range of 6–7. ... Desulfurization of iron ore ...
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Various studies have been increasingly performed on the reduction of sulfur content of iron ores and concentrates. The presence of sulfur in these materials causes technical problems in steel and alloys and environmental issues in the sintering of iron ore process. The achievement of higher sulfur removal rates has been an important goal since the development of sulfur …
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(DOI: 10.1080/01932691.2017.1281142) Iron ore tailings have become one kind of the most hazardous solid waste. Beneficiation of iron ore tailings is a significant issue in the world steel industries, from the point of view of both pollution control and secondary resources. This investigation addressed the processing of tailings with high sulphur content from an iron ore …
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Alternatively, the desulfurization of iron ores through flotation leads to a notable loss of valuable minerals. Efforts to enhance efficiency through collector mixtures (Yu et al., 2016) traduce environmental concerns, such as …
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The Kevitsa concentrator employs a Cu–Ni fractional selective flotation circuit with a desulfurization circuit at the end of the process. The original flotation circuit is a typical conventional polymetallic ore flotation (See Fig. 12) where copper is concentrated in the first circuit, and this is followed by a nickel flotation circuit. Two ...
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In addition, the properties of pellets produced before and after desulfurization by flotation were investigated. The results showed that using flotation, iron and sulfur grades changed from 66.08% and 1.12%, to 68.3% and 0.33%, respectively. Although flotation reduces the Blaine number of the pelletizing feed from 1800 to 1512 cm2/g, this ...
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the high-sulfur iron ore desulfurization process provided by the embodiment of the invention can be used for preparing low-sulfur iron ore powder with the sulfur mass fraction of less than or equal to 0.4% by using the high-sulfur iron ore with the sulfur mass fraction of more than or equal to 5%, and has the advantages of simple process and low investment cost.
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that column flotation was considerably more efficient than mechanical flotation for iron ore desulfurization so that a high purity concentrate with the iron recovery of 98%, can be obtained. Author
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A high sulfur content is one of the challenges in the processing of refractory bauxites in China. The high carbon content of bauxite makes it more difficult to deal with. Desulfurization and decarbonization are the critical issues in the efficient exploitation of high-sulfur bauxite resources. An experimental study on the removal of sulfur and carbon in high-sulfur …
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