The Desulfurization of Magnetite Ore by Flotation with a …

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.

CN111437990A

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.

The Effect of Column Flotation Operational Variables on …

This study presents an experimental program performed to study the effects of flotation column variables including gas flow rate, froth depth, slurry solids percent, frother/collector dosage, and pH on desulfurization of an iron ore concentrate.

Desulfurization of Iron Ores: Processes and Challenges

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 …

Desulfurization of hematitic concentrate of iron ore of the Gol …

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 ...

Desulfurization of Iron Ores: Processes and Challenges

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 …

Synthesis and characterization of a novel collector for the

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.

Desulfurization of coal by flotation of coal in a single-stage …

A single-stage flotation process was developed in which coal was floated out and pyrite was depressed. Up to 90% of the pyritic sulfur content of bituminous coal could be removed at 75% coal recovery. The process was applied to three Canadian and two United States coals. Higher coal recoveries were obtained for low sulfur coals; up to 94.4% coal recovery was possible …

Desulfurization of coal by microbial column flotation

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.

Summary of sulfur hazards in high‑sulfur bauxite and desulfurization

Desulfurization methods for high‑sulfur bauxite are mainly divided into pre-treatment desulfurization and post-treatment desulfurization methods. Most of the sulfur is removed by roasting, flotation, biological, electrochemical and other pre-treatment methods to avoid entering the Bayer process.

Effects of Multi-stage Grinding Process and Grinding Fineness on

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.

Desulforation of Sangan Iron ore concentrate using flotation

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 permitted limit used for the pelletizing …

Comparison of conventional and column flotation performance for

The results comparison of column and mechanical flotation have showed that the column cell outperformed the metallurgical performance for producing iron concentrate …

Recent advances in process and materials for dry desulfurization …

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 …

Desulfurization mechanism of high-sulfur coal by heating reduced iron

The experiment proved that the reduced iron powder affects the sulfur in the removed coal. When the mass ratio of coal powder to iron powder was 5:2, the best desulfurization effect was obtained at 600 °C for 1 h. The desulfurization rate reached 80.09%, and more than 76.32% organic sulfur was removed. The removal

The effect of column flotation operational variables on …

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

Evaluation of column flotation froth behavior by image analysis

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 ...

Flotation Desulfurization of Acidified High-Sulfur Bauxite

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 ...

The effect of high voltage electrical pulses on iron ore …

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.

A Case Study of Producing Alumina from High-Sulfur Diasporic …

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 ...

Desulfurization of Iron Ores: Processes and Challenges

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 …

Sulfur content reduction of iron concentrate by reverse flotation

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 …

A novel method for the comprehensive utilization of iron and …

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% ...

Characterization of High Sulfur Bauxite and Its Phase …

Among the iron bearing minerals, pyrite decreased from 35.93 to 3.21%, and hematite increased from 31.95 to 80.75%. It directly reflects the transformation from pyrite to hematite in the desulfurization process. ... At present, the flotation desulfurization technology for handling high sulfur bauxite is relatively mature, adaptable to various ...

The Desulfurization of Magnetite Ore by Flotation

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DESULFURIZATION OF IRON ORE CONCENTRATE …

The Effect of Regulators on Flotation Desulfurization of High …

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 ...

Experimental Study on Flotation Desulfurization of High …

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.

Desulfurization of coal by microbial column flotation

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.

flotation desulfurization of iron ore process

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