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With the increased requirements for fully using carbon resources and removing H 2 S from flue gas, chelated-iron wet desulfurization technology has gained popularity due to the advantages of high desulfurization efficiency, stable reaction, and low desulfurization cost, etc. In this review, the current commonly used chelates-iron processes, the …
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The results in optimal conditions indicated that column flotation was considerably efficient for iron ore desulfurization so that a high purity concentrate with …
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The impact of the zeta potential and surface chemistry on flotation and deslime is also discussed. The aim of this paper is to provide a well-detailed, well-referenced source for the current status of iron ore flotation, and thus provide a useful guide to its future development and to further improve flotation performance for iron ore.
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The contamination of sulfur emanating from pyrrhotite in magnetite concentrates has been a problem in iron ore processing. This study utilized froth flotation to float pyrrhotite away from magnetite using collectors of xanthate and dixanthogen. It was found that xanthate or dixanthogen alone could not achieve selective separation between ...
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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 flotation circuit at Sangan iron beneficiation plant. A plant survey indicated that sulfur content of iron concentrate is sometimes higher than that of the …
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Figure 2 shows the flotation circuit of industrial experiment in Baotou iron mine. The The rougher and cleaner of the industrial experiment syst em are composed of 6 and 4 units of 40 m 3
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A novel stepped flotation technique is discussed for the treatment of carbonate-rich iron ores. The necessity of desliming to enable effective flotation is …
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Pyrite Flotation With Xanthate Under Alkaline Conditions — Application to Environmental Desulfurisation R Mermillod-Blondin 1,2, M Kongolo 1, P de Donato 1, M Benzaazoua 2,3, O Barrès 1,
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Evaluation of column flotation froth behavior by image analysis: effects of operational factors in desulfurization of iron ore concentrate: Energy Sources, Part A: …
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10.30479/jmre.2018.1523. Abstract. Flotation is the most commonly used process for desulfurization of iron concentrates in iron beneficiation plants. The current study deals …
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The flotation tailing (froth product) was collected for 3 min. In the study, the effect of different collectors, flotation pH values, and mixed collector rates were investigated. Figure 1. Flow sheet of flotation tests. The concentrates and tailings from flotation after the filtering and drying were weighed and assayed, respectively.
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The effect of flotation for desulfurizing the iron pelletizing feed has been investigated. The flotation method can reduce the emission of harmful environmental gases during the pelletization process by reducing the concentrate's sulfur content. On the other hand, flotation causes a change in the Blaine of the iron concentrate and wastes some …
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This study presents an experimental program performed to investigate the effects of flotation variables including gas flow rate, froth depth, slurry solids percent, frother/collector dosage, and pH on the froth features such as bubble size, froth velocity, froth color and froth stability during desulfurization of an iron ore.
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Summary Based on a central composite design (CCD), the effect of operational factors as flow rate, froth depth, slurry solids percent, frother/collector dosage, and pH were considered on the flotation column performance in desulfurization process from iron concentrate. Sulfur, total Fe contents, and d80 of the sample were found to be 0.48%, …
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690 Brisbane, QLD, 6 - 9 June 2005 Centenary of Flotation Symposium PYRITE FLOTATION WITH XANTHATE UNDER ALKALINE CONDITIONS complexes with ferric iron could also be associated with a degradation of a complete pillar as described in the literature (de Donato et al, 1993, Miller et al, 2002).
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Finally, the techniques are compared from technical, economic and environmental viewpoints, and future trends in desulfurization of iron ores are presented. 1. Introduction The strength of steel is detrimental to the sulfur content of iron ore and pig iron (from which steel is made); therefore, excess steel sulfur content influences the ...
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A novel stepped flotation technique is discussed for the treatment of carbonate-rich iron ores. The necessity of desliming to enable effective flotation is discussed in detail.
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Flotation desulfurization separates sulfides from the ore according to the different properties of sulfides and oxides react with flotation reagents [20], [21]. Xanthate is a common flotation reagent for metal minerals desulfurization [22]. The method realizes desulfurization before minerals utilization and obtains high-grade sulfur products.
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Various studies have been increasingly performed on the reduction of sulfur content of iron ores and concentrates. ... In this way, the optimized condition 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 ...
DetailsWEBIn this way, the optimized condition and latest innovations in sulfur removal using flotation are reviewed and the development of leaching and bioleaching techniques for sulfur …
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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 …
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Hydrophobic coal carrier and hydrophilic fine coal were subjected to systematic flotation testing using a 2-1 Denver cell at 20 % by wt. solids for the purpose of deashing and desulfurization of fine lignitic coal. In carrier flotation tests, while the carrier coal was used in three different size groups, the size of fine carried coal was kept ...
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Desulfurisation and ash reduction of pyrolysis carbon black from waste tires by combined ... concentration of 99 kg/t. Then, flotation results show that 79.96% yield of clean carbon black and 9.14% ash content for flotation concentrate under ... Then, iron scraps were removed by magnetic separation. Thirdly, CBp was separated and purified …
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Factors affecting iron ore flotation. 1. Ore properties: The physical properties (such as density, hardness, etc.) and chemical properties (such as mineral composition, surface wettability, etc ...
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The iron powder to coal powder ratio was 1:1 when the iron powder was used in the reaction experiment. The result is shown in Fig. 3. When the reduced iron powder was involved in the reaction, the desulfurization rate was higher than that without crystallized iron powder. The highest magnetic separation desulfurization effect of 1 h at …
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The results in optimal conditions indicated that column flotation was considerably efficient for iron ore desulfurization so that a high purity concentrate with the sulfur content of 0.08 % and ...
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Pyrite flotation was observed to be effective with a statistical monolayer of xanthate that could be adsorbed as mixture of dixanthogen and metal-xanthate complex. Non-floated fractions showed high amounts of carbonate, and presence of hydroxyl iron sulfate (Fen(OH)m(SO4)p, xH2O) which have inhibited the hydrophobicity effect of adsorbed …
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Pyrite has some hydrophobicity, 7 so the research of Nakhaei et al., 8 reported a combination of heavy magnetic and flotation methods for high-sulfur iron tailings, ... The priority is the oxidation roasting which occurs together with the desulfurisation of hematite and the variation of its Pb-Zn content at different …
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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 …
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The extensive literature on sulfide flotation indicates that pyrite poorly floats under alkaline condition. Xanthate concentration has a positive effect on pyrite flotation, but above a pH of 11, pyrite seems to be strongly depressed, independently of the concentration in xanthate. In this investigation, aeration and xanthate concentration effects were studied for pyrite …
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Results in optimal conditions indicated that column flotation was considerably more efficient than mechanical flotation for iron ore desulfurization with the iron recovery of …
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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 reduction is mainly due to the removal of fine clay particles and did not harm pellet oxidation.
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A specially designed flotation column featured with a nano bubble generator and a conventional bubble generator were employed to assess the effects of nano bubbles on the desulfurisation ...
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For weakly magnetic iron ore with low theoretical grade and various sulfur-containing types, iron ore concentrate with low impurity content can be obtained through a combined roasting-magnetic separation-flotation process, significantly improving product quality. After iron ore is desulfurized, the economic benefits are significant.
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An excellent separation was obtained by the microbial flotation using a long column which had a length‐diameter (L/D) ratio of 12.7. The long column flotation reduced the pyritic sulfur content from 11% (feed coal) to 1.8% (product coal) when 80% of the feed coal was recovered without the kerosene addition.
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