iron ore desulfurization

Desulfurization characteristics and mechanism of iron oxide-modified bio-carbon materials - ScienceDirect. Energy. Volume 258, 1 November 2022, 124865. …

The current methods of desulfurization of ore include chemical, physicochemical, and thermal methods, flotation, and bioleaching [6]. It is an urgent need of finding a green, efficient, and low-cost technological method to reduce the sulfur content in iron concentrates.

The pulp production process generates a CaCO 3-rich solid waste known as white mud (WM), and its improper disposal is a cause for global concern.The present study investigates the composition, microstructure, and thermal decomposition characteristics of WM and proposes a strategy for replacing limestone with WM for iron ore sintering.

Compared with iron ore with higher sulfur content, better desulfurization efficiency is obtained by oxidizing roasting. In addition, yellow condensed sulfur is also found at the tail flue gas outlet, which indicates that the sulfur in the FeS 2 is released in the form of elemental sulfur (S x ) in the N 2 atmosphere.

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].

Ultrasonic technology is being increasingly explored in minerals processing. In this paper, ultrasonic treatment was introduced as a novel method for microbial desulfurization of sulfide ores. A …

Iron ore sintering is the main SO 2 emission process in iron and steel industry. The flue gas of iron ore sintering has been cleaned by desulfurization equipment, which causes high capital and operation cost. A novel technology of reducing SO 2 emission of flue gas during iron ore sintering process by adding urea into granules …

iron ores with a high content of impurities, such as sulfur, have been processed [2]. Pyrrhotite (Fe1 xS) is a kind of common sulfide which exists in magnetite ore as an associated mineral with little industrial value. The contamination of sulfur emanating from pyrrhotite in magnetite concentrates has been a problem in iron ore smelting process.

The pulp production process generates a CaCO 3-rich solid waste known as white mud (WM), and its improper disposal is a cause for global concern.The present study investigates the composition, microstructure, and thermal decomposition characteristics of WM and proposes a strategy for replacing limestone with WM for iron ore sintering. …

Manganese oxide ore is usually accompanied by manganese, iron and SiO 2, and the iron exists mainly in the form of hydroxyl iron oxide in the DS after the wet desulfurization process. This enables the desulfurized manganese slag to have a similar constitution to that of the manganese tailings (MT) but with a low Mn content.

The Since China's iron ore resources are characterized by many poor ores, multi-component coexistence and fine embedded particle size, the generated tailings are characterized by extremely fine particles and great quantity. ... seeking a good way for the effective utilization of iron tailings. Desulfurization ash (DA) is the by-product of ...

A straightforward alternative to iron ore desulfurization involves acid leaching, where the reduction of sulfur content is directly proportional to H 2 SO 4 concentration and reaction time, while inversely related to particle size. This approach can achieve up to 88% sulfur removal using 4M H 2 SO 4, ...

Abstract. 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 …

In iron ore desulfurization Leaching, defined as the chemical attack of minerals for the process, the bacteria which have a potential for sulfidic minerals recovery of …

Desulfurization of Iron Ores: Processes and Challenges | Request PDF. May 2018. Steel Research International 89 (7):1700568. DOI: 10.1002/srin.201700568. …

In this study, a novel method for simultaneously improving desulfurization of iron ore and lowering SO 2 emission in its flue gas by microwave roasting of the …

A typical of the high sulfur iron ore from Inner Mongolia, China, iron grade of 53.06% and sulfur content is 2.76%, the main metal mineral in the ore is magnetite, followed by magnetic pyrite ...

A straightforward alternative to iron ore desulfurization involves. acid leaching, where the reduction of sulfur content is directly. proportional to H. 2. SO. 4. concentration and reaction time ...

Installing desulfurization operations and closing outdated facilities can effectively decrease pollutant emissions from iron ore sintering plants (IOSPs). Polybrominated dibenzo- p-dioxin and dibenzofuran (PBDD/F) emissions from different-sized IOSPs with different desulfurization operations were an …

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 …

The deoxidation and the desulfurization equilibria of liquid iron by calcium have been investigated at 1 873 K. ... Because of the iron ore source used, the hot metal phosphorous content is rather ...

The low-temperature wet oxidation behavior of semi-dry desulfurization ash from iron ore sintering flue gas in ammonium citrate solution was investigated for efficiently utilizing the low-quality ...

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 ...

In this work, the feasibility study of desulfurization process for iron ore used in the pelletizing plant was carried out in the fourth line of the Gol-e-Gohar Complex. Two methods were examined ...

1. Introduction. The iron and steel industry is a pillar of the national economy and represents its degree of development [1].However, the insufficiency of high-quality iron ore resources seriously threatens the safety of the iron and steel industry [2].China, the world's largest iron ore consumer and steel producer, manufactured 1.018 billion tons of …

The iron ore sintering process is the main source of SO2 emissions in the iron and steel industry. In our previous research, we proposed a novel technology for reducing SO2 emissions in the flue gas in the iron ore sintering process by adding urea at a given distance from the sintering grate bar. In this paper, a pilot-scale experiment was …

Realization of low temperature and high efficiency oxidation of CaSO 3 is the key to solve the issue of ecological hazards caused by semi-dry sintering flue gas desulfurization ash. The subcritical hydrothermal technology was employed for the oxidation of CaSO 3, achieving 89.83% of CaSO 3 at 180 °C, 2 MPa for 120 min with a solid-to-liquid ratio of …

This paper aims to reveal the progress of microbial desulfurization research on fuels and ores using bibliometric analysis. 910 publications on microbial …

[Show full abstract] size, froth velocity, froth colour and froth stability) in the column flotation was discussed during desulfurization of an iron ore using response surface methodology.Image ...

urea addition on the desulfurization of iron ore and SO. 2 . emission in flue gas were determined. Experimental . Materials . The iron ore used in this study was ludwigite ore, a typical sulfur-containing iron ore in China. The main chemical composition of iron ore is listed in Table 1. Figure 1

@article{Wang2023SubcriticalHO, title={Subcritical hydrothermal oxidation of semi-dry ash from iron ore sintering flue gas desulfurization: Experimental and kinetic studies.}, author={Yi-fan Wang and T. Yang and Long Ding and Ru-fei Wei and Lixin Qian and Hong-ming Long and Chunbao Charles Xu}, journal={Waste management}, year={2023}, …

D. Zhou et al. used semi dry desulfurization ash from iron ore sintering flue gas as a raw material to prepare calcium sulfate whiskers by removing impurities in gypsum, preparing crystals and optimizing the control [75]. H.X. Li et al. mixed the desulfurization ash produced by semi-dry desulfurization into α-hemihydrate gypsum to prepare a ...