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 …

Semi-dry flue gas desulfurization ash (SFGDA) is an abandoned Ca and S resource that is currently stacked without appropriate disposal methods. A technology with industrialization potential, SFGDA, and iron ore thermal processing is an effective approach to obtaining calcium ferrite and industrial sulfuric acid.

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 …

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].

Among them, calcium desulfurization process is applied on a large scale due to its low cost and becomes the primary desulfurization process, which is widely used in electric power, iron and steel, non-ferrous metals, and other industries [9, 10]. Industrial flue gas desulfurization can effectively reduce sulfur dioxide emissions to atmosphere ...

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

Desulfurization of iron-ore pellets was considered in [1‐7]. On the basis of these results and the thermodynamic analysis of possible reactions, the main chemical reactions of sulfur compounds ...

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 ...

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 …

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 …

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.

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, ...

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

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 metals, is the first step of any hydrometallurgical oxidation should be focused on and also, the ones can oxidize process. ...

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 ...

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

Separated preparation of prealloys and amorphous alloys results in severe solidification–remelting and beneficial element removal–readdition contradictions, which markedly increase energy consumption and emissions. This study offered a novel strategy for the direct production of FePC amorphous soft magnetic alloys via smelting reduction …

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 ...

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

Desulfurization of iron-ore pellets was considered in [1–7]. On the basis of these results and the thermo-dynamic analysis of possible reactions, the main chem-ical reactions of sulfur compounds during the heat treatment of pellets may be established. All the reac-tions associated with pellet desulfurization may be

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 …

Installing desulfurization systems and closing outdated facilities can effectively decrease pollutant emissions from iron ore sintering. Polybrominated dibenzo-p-dioxin and dibenzofuran (PBDD/F ...

A novel technology of reducing SO 2 emission of flue gas during iron ore sintering process by adding urea into granules bed was investigated in this paper. The results show that the emission concentration of SO 2 in flue gas decreased significantly by adding urea loaded in the bed. The desulfurization rate higher than 85% was obtained …

Desulfurization of Iron Ores: Processes and Challenges. Hassan Rezvanipour, A. Mostafavi, +2 authors. Mohsen Khezri. Published 1 July 2018. Materials …

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.

Manganese ore-based wet flue gas desulfurization (MFGD) is a resourcing technology capable of simultaneously reutilization flue gas sulfur dioxide (SO 2) and green, low-carbon manganese leaching.However, the by-product manganese dithionate (MnS 2 O 6) greatly affects the use of desulfurization liquid.In this study, the iron introduced …

Desulfurization of Chinese anthracite coal was investigated using iron ore powder and sodium hydroxide under mild condition. Effects of iron ore, sodium hydroxide and treating time on coal desulfurization were discussed. Basically, sulfur reduction was found increasing with concentration of iron ore and sodium hydroxide increasing as well as ...

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.

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.

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 ...