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 …
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The low flotation performance of fine and ultrafine particles is attributed to characteristics related to their small sizes, i.e. low inertial mass and high specific surface area (Demers, 2005, Wills and Finch, 2016).Their small size and low mass result in a low flotation rate because of a low probability of particle bubble collision and attachment and therefore an …
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Request PDF | Evaluation of column flotation froth behavior by image analysis: effects of operational factors in desulfurization of iron ore concentrate | Flotation performance is expected to be ...
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The results of flotation tests showed that sodium silicate performed better as depressant of iron oxide, but had little effect on silica flotation in the apatite- iron oxide- silica flotation system.
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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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Desulfurization of low rank coal co-pyrolysis with reduced iron powder followed by dry magnetic separation. Author links open overlay panel Wencheng Xia, ... Flotation tailings are a secondary iron ore resource with abundant reserves and recycling value. In this study, low-grade flotation tailings (TFe = 21.86%) with silica of 57.85% has been ...
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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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Two methods were examined for desulfurization process using reverse floatation: 1) grinding the produced concentrate by low intensity magnetic separators (Final concentrate of plant) and …
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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 …
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Bacterial treatment was applied to column flotation. An increase of cell density in the microbial column flotation resulted in the increase of pyrite removal from a coal‐pyrite mixture (high sulfur imitated coal) with corresponding decrease of coal recovery.
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that column flotation was considerably more efficient than mechanical flotation for iron ore desulfurization so that a high pu rity concentrate with the iron recovery of 98 %, can be obtained ...
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It follows that the optimal regrinding fineness is 90% -0.045mm. In the circumstances, the S grade of iron concentrate reaches 0.98% with the TFe recovery of 48.50%. Therefore, the separation process of multi-stage grinding is a promising way for iron recovery and desulfurization of the high-sulfurous iron ore. Fig. 5.
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In China, there are relatively more studies on the flotation desulfurization of high-sulfur bauxite, which mainly includes calcined desulfurization, flotation desulfurization, biological oxidation desulfurization[4]. Flotation desulfurization is recognized as a relatively economic and mature desulfurization technology. 2.
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This paper examines the feasibility of desulfurization by flotation at the laboratory scale as a sustainable tailings management approach to prevent CND generation from tailings …
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A tremendous amount of research has been done on refining the flotation process for iron ore and designing the reagents which go into it. This paper reviews the industrial practices and fundamental research surrounding iron ore flotation. The advantages and disadvantages of direct flotation, cationic reverse flotation, and anionic reverse ...
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When the mass ratio of coal to iron is 5:2, the desulfurization rate increases slightly with increasing reduced iron powder. The main reason is that the more crystallized iron powder there is, the lower the recovery rate of clean coal, which indirectly leads to increased sulfur relative content. However, the recovery rate of coal samples did ...
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Here, the combined methods of flotation and oxidation were adopted for desulfurization, and the desulfurization mechanisms were analyzed via XPS (X-ray photoelectron spectrometer), SEM (Scanning ...
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iron sulfide mineral and often viewed as a gangue . mineral [9]. In addition, sulfur also exists in bauxite . in the forms of pyrite iso mers, such as marcasite, ... 3.4 Flotation desulfurization .
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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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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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Desulfurization of hematitic concentrate of iron ore of the Gol-E-Gohar mine using reverse flotation method E. Panahi 1, A. Abdollahzadeh 2, A. Sam 3, M. Jahani 4, M. Yaghobi Moghaddam 4, A ...
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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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The desulfurization ratio of flotation process was calculated by the following equation: Ls F @®> 5 > 4 (2) where D is desulfurization ratio of flotation process, is yield of concentrate, 1 is the S grade of concentrate, and 0 is the S grade of raw ore. Figure 1. Flow sheet of flotation tests.
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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. The long column flotation not only attained an excellent separation but also reduced the amount of cells for desulfurization to as little as one-tenth of the reported amount.
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This investigation addressed the processing of tailings with high sulphur content from an iron ore concentrator to produce pellet feed fines and to prevent acid mine drainage. …
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Currently, desulfurization technologies can be categorized into three main types: wet flue gas desulfurization (FGD) [11], [12], [13], semi-dry desulfurization [14] and dry desulfurization [15].Wet flue gas desulfurization is widely employed in large-scale desulfurization processes due to its high efficiency and low energy consumption [16].However, it poses a …
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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 …
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