Desulfurization in Roasting Iron-Ore Pellets
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
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Upgrading Iron Ore by Microwave Desulfurization with …
In this study, a novel method for simultaneously improving desulfurization of iron ore and lowering SO 2 emission in flue gas at low temperature by microwave …
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Desulfurization of Iron Ores: Processes and Challenges
The reagents used in iron ore flotation, including starch, amines and fatty acids, and the mechanisms of their interactions with the minerals in iron ore are examined.
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Novel technology of reducing SO2 emission in the iron ore sintering
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 …
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Assessment of the effect of iron magnetic concentrate desulfurization …
The reverse flotation of pyrite particles was used for desulfurization of the iron ore for two reasons. Firstly, the amount of pyrite is significantly less when comparing the magnetite in the iron ore sample. Secondly, Pyrite is more hydrophobic and can be easily floated using xanthate collectors.
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Iron Ore Desulfurization Methods & Processes
Iron ore desulfurization is the process of removing sulfur from iron ore that contains sulfur compounds. Sulfur is a common impurity in iron ore, and the presence of sulfur compounds can adversely affect the ironmaking process and product quality. Therefore, desulfurization is an essential link in the iron ore pretreatment process.
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An Experimental Study on Enhancing Microbial …
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 …
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Desulfurization in roasting iron-ore pellets | Steel in …
Desulfurization in roasting iron-ore pellets. Published: 29 April 2009; Volume 38, pages 1003–1007, (2008) Cite this article; Download PDF. Steel in Translation Aims and scope Desulfurization in roasting iron-ore pellets Download PDF. V. M. Abzalov 1, A. V. Sudai 1 & B. P ...
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Subcritical hydrothermal oxidation of semi-dry ash from iron ore
DOI: 10.1016/j.wasman.2023.02.002 Corpus ID: 250511080; Subcritical hydrothermal oxidation of semi-dry ash from iron ore sintering flue gas desulfurization: Experimental and kinetic studies.
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Desulfurization of Iron Ores: Processes and Challenges
Desulfurization using thermal decomposition is a side process in iron ore sintering where the iron ore concentrate turns to roasted pelletized iron ore and this has been considered by many researchers.[55–59] All the reactions associated with pellet desulfurization may be divided into four steps: the dissociation of sulfides; their oxidation ...
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Optimal hot metal desulphurisation slag considering iron …
Research Article. Optimal hot metal desulphurisation slag considering iron loss and sulphur removal capacity part I: fundamentals. Frank N. H. Schrama., …
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A pilot study on recovery of iron from sulfur-bearing hematite ore
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 …
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Desulfurization of low rank coal co-pyrolysis with reduced iron …
1. Introduction. During the coal combustion and utilization, the sulfur, such as pyrite and organic sulfur in coal is a key issue for the environmental protection (Restrepo et al., 2015).The sulfur in coal is removed or controlled by three major methods, i.e. removal of sulfur by coal preparation or cleaning techniques prior to utilization (Eliot, 1978), sulfur …
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Desulfurization strategies in oxygen steelmaking
The deoxidation and the desulfurization limits of liquid iron by calcium are calculated to be 1.6 mass ppm O (at 15 mass ppm Ca) and 3.5 mass ppm S (at 40 mass ppm Ca) under the condition of aCaO ...
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Resource utilization of flue gas calcium-based desulfurization …
Calcium-based desulfurization ash (CDA) is mainly produced in dry and semi-dry flue gas desulfurization processes. The property of CDA is extremely unstable because its main component, calcium sulfite, makes it difficult to be directly applied to the field of building materials. ... The filling material is made of iron ore overflow tailings as ...
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Establishing a green biodesulfurization process for iron ore
One option involves roasting the sulfur content in iron ore using an oxidant, usually oxygen, and heat in a thermal decomposition process. In this operation, sulfur …
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Low-temperature oxidation behavior and mechanism of semi …
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 desulfurization ash. The effects of the ammonium citrate concentration, oxidation temperature, solid/liquid ratio, and oxidation time on the wet …
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Novelty on deep reduction roasting through removal of lead …
1. Introduction. Iron has wide industrial applications in many aspects of the social economy, such as steel making. Iron ore is abundant in iron-containing minerals and mainly occurs in the form of rocks, magnetite (Fe 3 O 4), haematite (Fe 2 O 3), siderites (FeCO 3) and limonite (2Fe 2 O 3 ·nH 2 O) [1, 2].Zinc and lead are commonly found in …
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Sulphur removal in ironmaking and oxygen …
There are four stages where sulphur can be removed: in the blast furnace (BF), during hot metal (HM) pretreatment, in the converter …
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Establishing a green biodesulfurization process for iron ore
Establishing a green biodesulfurization process for iron ore concentrates in stirred tank and leaching column bioreactors using Acidithiobacillus thiooxidans. Front Bioeng Biotechnol. ... We then compared the At. thiooxidans-mediated desulfurization process, with and without air supply, under potassium limitation, varying the initial …
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Study on the Migration and Release of Sulfur during the …
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.
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Novel technology of reducing SO2 emission in the iron ore …
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 bed was investigated in this paper.
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DESULFURIZATION OF IRON ORE CONCENTRATE USING …
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 …
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Desulfurization of Iron Ores: Processes and Challenges
Based on our knowledge, desulfurization of iron ores using various physical and chemical processes and their potentials, Various studies have been increasingly performed on the …
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Subcritical hydrothermal oxidation of semi-dry ash from iron ore
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 …
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Desulfurization of Iron Ores: Processes and Challenges
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 ...
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The effect of column flotation operational variables on desulfurization …
[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 ...
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A pilot-scale study of selective desulfurization via urea addition …
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 …
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Low-temperature oxidation behavior and mechanism of semi …
The low-temperature wet oxidation behavior of semi-dry desulfurization ash from iron ore sintering flue gas in ammonium citrate solution was investigated for …
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Effects of Desulfurization Processes on Polybrominated …
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 …
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