Clean production of Fe-based amorphous soft magnetic …
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 …
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.
Resource utilization of semi-dry flue gas desulfurization ash …
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.
(PDF) OPTIMIZATION OF PARAMETERS IN COLUMN FLOTATION IN DESULFURIZATION
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 ...
Desulfurization of Iron Ores: Processes and Challenges
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 …
Recycling of manganese ore desulfurization slag for …
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.
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 solid-to-liquid ratio of …
A pilot-scale study of selective desulfurization via urea
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 …
Novel technology of reducing SO2 emission in the iron ore …
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 …
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 …
Acidithiobacillus ferrooxidans and mixed Acidophilic …
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.
Preparation of Green Low-Carbon Baking-Free Bricks from Iron …
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 ...
Desulfurization of Iron Ores: Processes and Challenges
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. ...
Establishing a green biodesulfurization process for …
Establishing a green biodesulfurization process for iron ore concentrates in stirred tank and leaching column bioreactors using Acidithiobacillus thiooxidans. …
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 ...
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 …
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.
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 …
Desulfurization of Iron Ores: Processes and Challenges
Desulfurization of Iron Ores: Processes and Challenges | Request PDF. May 2018. Steel Research International 89 (7):1700568. DOI: 10.1002/srin.201700568. …
Desulfurization characteristics and mechanism of …
Desulfurization characteristics and mechanism of iron oxide-modified bio-carbon materials - ScienceDirect. Energy. Volume 258, 1 November 2022, 124865. …
Upgrading Iron Ore by Microwave Desulfurization …
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 …
Desulfurization of Iron Ores: Processes and …
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 Desulfurization of Magnetite Ore by Flotation with …
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.
In-process control of manganese dithionate in the manganese ore …
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 …
Subcritical hydrothermal oxidation of semi-dry ash from iron ore
@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}, …
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 …
Establishing a green biodesulfurization process for iron ore
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, ...
Desulfurization in roasting iron-ore pellets
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 ...
A new disposal method for white mud: Replacing limestone in iron ore …
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. …
Assessment of the effect of iron magnetic concentrate desulfurization …
On the other hand, pyrite in iron ore increases the moisture required for pelletization, and this high water content may cause cracks due to a fast drying speed (Eisele and Kawatra, 2003). Therefore, the simultaneous desulfurization with pellets oxidation can adversely affect the quality of fired pellets ( Forsmo et al., 2008, Praes et …