using xanthate or similar collectors. However, the process is not so straightforward, flotation desulfurization of high-sulfur bauxites has its challenges. High-sulfur bauxite is difficult to handle in flotation. Desulfurization by flotation requires that the crystal surfaces of pyrite are exposed by grinding. Pyrite liberation generally ...
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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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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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The clean and efficient utilization of coal is a promising way to achieve carbon neutrality. Coking coal is a scarce resource and an important raw material in the steel industry. However, the presence of pyrite sulfur affects its clean utilization. Nonetheless, this pyrite could be removed using depressants during flotation. Commonly used organic depressants (sodium …
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The flotation test results obviously show that sodium silicate is an effective regulator for flotation desulfurization and can not only improve inhibition of pyrite caused by acidification of ores, but also solves adverse effects on flotation, such as ore sliming, a common characteristic of oxidized ores.
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High sulfur content in iron ore negatively impacts the quality and processing operation of the produced iron. The origin of sulfur in iron ore samples is usually Pyrite, Pyrrhotite, Chalcopyrite, etc. (Yu et al., 2016). Flotation was used as a separate commercial process to remove pyrite from iron-bearing minerals.
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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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Flotation desulfurization uses collectors to selectively adsorb sulfur-containing minerals to separate them from other minerals. In the high‑sulfur bauxite flotation desulfurization process, Na 2 CO 3 or HCl is often used as a pH adjusting agent, CuSO 4 is used as an activator, terpenic oil is used as a frother. The chemical properties of the ...
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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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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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Iron and titanium resources are quite rich in Ziyang County (southern Shanxi Province of China), while the overall grade is low and mineral compositions are complex. ... The fineness of first stage grinding was about 70% −74 μm, which was mainly beneficial to flotation desulfurization. And the fineness of second stage grinding was 90%–95% ...
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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 …
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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 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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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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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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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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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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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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In this research, an effort is made to separately introduce the various processes, industrial practices, and fundamental research activities to remove sulfur from iron ores, concentrates, or …
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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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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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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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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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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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Aluminum is the second most sourced metal after iron and steel worldwide (Yi et al., 2022), while bauxite is a critical raw material of the alumina industry. ... The flotation desulfurization closed-circuit experiment was carried out with the commonly used collector and <400 mesh high-sulfur bauxite as raw material.
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The results comparison of column and mechanical flotation have showed that the column cell outperformed the metallurgical performance for producing iron concentrate …
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