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Installing desulfurization operations and closing outdated facilities can effectively decrease pollutant emissions from iron ore sintering plants (IOSPs).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 analyzed. The desulfurization operations' PBDD ...

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 MFGD process to …

Low-temperature oxidation behavior and mechanism of …

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 ...

Promotion of manganese extraction and flue gas desulfurization …

In this work, Mn ore was mixed with the wastewater anode solution of electrolytic Mn (ASEM, instead of water) and utilized as the desulfurizer for simultaneous SO 2 removal from flue gas and Mn extraction. The effects of Fe 2+ and Fe 3+ on Mn leaching and flue gas desulfurization were investigated. For MnO 2 and Mn 2 O 3 (mixed with ASEM), the …

Evaluation of column flotation froth behavior by image …

This study presents an experimental program performed to investigate the effects of flotation variables including gas flow rate, froth depth, slurry solids percent, frother/collector dosage, and pH on the froth features such as bubble size, froth velocity, froth color and froth stability during desulfurization of an iron ore.

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 oxidation behavior of …

Study on the Preparation of Green Low-Carbon Baking-Free …

Iron tailings are solid wastes generated after iron ore has been processed and selected for valuable components. With the development of the iron and steel industry, the amount of iron tailings generated has been accumulating, and it is reported that as of 2021, the national stock of tailings has exceeded 20.7 billion t, of which more than 39.3%, or about 8.14 …

Effects of Circulated Flue Gas Components on Iron Ore …

Sulfur dioxide is one of the precursors of acid rain and desulfurization of the exhaust gases in iron ore sintering plants is essential. For the purpose of reducing SO 2 emissions of iron ore sintering, flue gas circulation sintering (FGCS) process was employed to enrich SO 2 content in off-gas in this work. Effects

DESULFURIZATION OF IRON ORE CONCENTRATE USING A …

The proper feed for the pelletizing plant must have iron and the Blaine number more than 67 % and 1900 cm 2 g -1 and sulfur content less than 0.1 %, respectively. 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 for desulfurization …

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 blast furnace (BF) …

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.

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 of Iron Ores: Processes and Challenges

Desulfurization of Iron Ores: Processes and Challenges. Hassan Rezvanipour, Corresponding Author. Hassan Rezvanipour ... of sulfur in these materials causes technical problems in steel and alloys and environmental issues in the sintering of iron ore process. …

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 …

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 ...

The Desulfurization of Magnetite Ore by Flotation with …

The Desulfurization of Magnetite Ore by Flotation with a Mixture of Xanthate and Dixanthogen Jun Yu, Yingyong Ge * and Xinwei Cai ... However, in the practice of iron ore flotation, the loss of valuable mineral in tailings is the major problem confronting the iron ore industry. Thus, the reagent suit is formulated

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 ...

Resource utilization of semi-dry flue gas desulfurization ash …

DOI: 10.1016/j.jece.2024.112356 Corpus ID: 268224525; Resource utilization of semi-dry flue gas desulfurization ash by thermal treatment on sintering machine @article{Liu2024ResourceUO, title={Resource utilization of semi-dry flue gas desulfurization ash by thermal treatment on sintering machine}, author={Lincheng Liu and Xiao-hui Fan and Zhi-an Zhou and Min Gan and …

DESULFURIZATION OF IRON ORE CONCENTRATE USING A …

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 Mechanism of Lead–Zinc-Bearing …

Sulfur is widely found in natural minerals, 1 but is a harmful impurity in the processing of iron ore for the production of steel. Therefore, pre-desulfurization of iron ore …

Low-temperature oxidation behavior and mechanism of semi …

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 carried out in a commercial …

Evaluation of column flotation froth behavior by image …

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 ...

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 bed was investigated in this paper.

Advances on resource utilization of semi-dry desulfurization …

The semi-dry flue gas desulfurization ash (SFGDA) is an industrial waste generated by the semi-dry desulfurization process, and its resources have been continuously attracted attention. Through the method of heat decomposition, the SFGDA decomposed into CaO and SO2 has emerged as a prominent research topic. This paper summarizes various of …

Preparation of Green Low-Carbon Baking-Free Bricks from Iron …

The utilization of iron ore tailings is difficult, which brings great pressure to the enterprise and ecological environment. At present, ... seeking a good way for the effective utilization of iron tailings. Desulfurization ash (DA) is the by-product of desulfurization of sintered flue gas by dry and dry method, ...

Establishing a green biodesulfurization process for iron ore

We then compared the At. thiooxidans-mediated desulfurization process, with and without air supply, under potassium limitation, varying the initial biomass concentration in 1-m …

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 during the heat treatment of pellets may be established. All the reactions associated with pellet desulfurization may be divided into four groups: the dissociation of …

Desulfurization Mechanism of Lead–Zinc-Bearing …

a harmful impurity in the processing of iron ore for the production of steel. Therefore, pre-desulfuriza-tion of iron ore before smelting can not only reduce environmental pollution2,3 but also improve the quality of steel4 (increase ductility and toughness, reduce cracking in forging and rolling, reduced ''hot brittleness'' of steel).

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 1:20.