Nitrogen monoxide reduction by carbon monoxide to combustion control with calcium ferrite redox in iron ore sintering

Dai, Mengbo; Gu, Baoshu; Ma, Xuxu; Chun, Tiejun

doi:10.1016/j.fuel.2022.127172

Cited by 18 publications

(3 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The result may be attributed to the proper CaO dosage, which could facilitate the conversion of weakly magnetic iron minerals. On the other hand, an excessive CaO could interact with FeO and Fe2O3 to produce calcium ferrite [25], thus impairing the lowintensity magnetic separation. According to Figure 8b, the iron grade and recovery rose with an increased alkalinity until they reached their maximum at an alkalinity of 2.16, and then decreased.…”

Section: Alkalinitymentioning

confidence: 99%

See 1 more Smart Citation

Arsenic Removal and Iron Recovery from Arsenic-Bearing Iron Ores by Calcification-Magnetic Roasting and Magnetic Separation Process

Dai,

Zhou,

Xiao

et al. 2023

Materials

Self Cite

View full text Add to dashboard Cite

Extracting iron while minimizing the health and environmental risks associated with arsenic contamination necessitates the removal of arsenic from arsenic-bearing iron ores to ensure a safe and sustainable supply of this metal for industries. The beneficiation of iron minerals and arsenic-bearing minerals from arsenic-bearing iron ores with a calcification-magnetizing roasting and low-intensity magnetic separation (CMR-LMS) process is investigated in this work. The results show that the process is successful in extracting iron minerals and eliminating arsenic-containing minerals. The roasting involves two key steps: calcification and magnetizing, which change hematite and goethite into magnetite and arsenic-bearing minerals into calcium arsenates. The process’s separation efficiency of the CMR-LMS is closely linked to the parameters such as roasting temperature, roasting time, coke, alkalinity, and the liberation of gangue minerals from iron minerals. Through grinding and secondary magnetic separation, the iron minerals and gangue components, as well as arsenic, in roasted sand can be further separated. The optimum procedure results in a high-grade iron concentrate with an iron assay of 65.65%, an Fe recovery rate of 80.07%, and an arsenic content of 0.085%, while achieving a 93.29% As removal rate from the original ore that has 45.32% Fe and 0.70% As.

show abstract

Section: Alkalinitymentioning

confidence: 99%

Section: Alkalinitymentioning

confidence: 99%

Arsenic Removal and Iron Recovery from Arsenic-Bearing Iron Ores by Calcification-Magnetic Roasting and Magnetic Separation Process

Dai,

Zhou,

Xiao

et al. 2023

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Currently, pollutant emissions from the sintering process mainly include volatile organic compounds (VOCs), nitrogen oxides (NO x ), carbon monoxide (CO), and others. 3 Among these, nitrogen oxides (NO x ) pose the most significant challenge due to their difficulty in control and high treatment costs, making them a key performance indicator affecting the environmental operation of the sintering industry. NO x control in the sintering process has primarily relied on temperature-based Selective Catalytic Reduction (SCR).…”

Section: Introductionmentioning

confidence: 99%

The mechanism of NO_x removal in the sintering process based on source reduction of carbon emissions

Han,

Shao,

Wang

et al. 2024

RSC Adv.

View full text Add to dashboard Cite

show abstract

Effect of Electroplating Sludge on the Iron Ore Sintering: Mineralization, Yield and Gaseous Emission

Tang,

Ding,

Wang

et al. 2024

steel research int.

View full text Add to dashboard Cite

Electroplating sludge (ES), the inevitable by‐product of electroplating wastewater treatment processes, has been conventionally managed via solidification landfilling or thermal processing; these methods may engender secondary environmental pollutants. This study proposes an innovative approach using iron ore sintering for effective ES treatment. The study reveals that incorporating 1.0% ES reduces the yield quality of the sintered ore, yet it remains within acceptable thresholds. It is noteworthy that when the addition of ES is 0.5%, it not only increases the sinter yield from 68.57% to 69.23% but also enhances the productivity from 1.19 to 1.32 t (m2 h)−1. Furthermore, the consumption of solid fuel decreases to 48.01 kg t−1. Additionally, the treatment method significantly reduced the emissions of CO and NOx in the sintering flue gas, with the average concentrations decreasing from 12681.32 to 9744.51 ppm for CO and from 244.81 to 161.11 ppm for NOx. This study investigates the migration and transformation mechanisms of nickel and chlorine elements in ES by conducting inductively coupled plasma analysis on the sintered raw materials and their products, as well as scanning electron microscopy with energy dispersive X‐ray spectroscopy analysis on the sinter ash.

show abstract

Nitrogen monoxide reduction by carbon monoxide to combustion control with calcium ferrite redox in iron ore sintering

Cited by 18 publications

References 57 publications

Arsenic Removal and Iron Recovery from Arsenic-Bearing Iron Ores by Calcification-Magnetic Roasting and Magnetic Separation Process

Arsenic Removal and Iron Recovery from Arsenic-Bearing Iron Ores by Calcification-Magnetic Roasting and Magnetic Separation Process

The mechanism of NO_x removal in the sintering process based on source reduction of carbon emissions

Effect of Electroplating Sludge on the Iron Ore Sintering: Mineralization, Yield and Gaseous Emission

Contact Info

Product

Resources

About

Nitrogen monoxide reduction by carbon monoxide to combustion control with calcium ferrite redox in iron ore sintering

Cited by 18 publications

References 57 publications

Arsenic Removal and Iron Recovery from Arsenic-Bearing Iron Ores by Calcification-Magnetic Roasting and Magnetic Separation Process

Arsenic Removal and Iron Recovery from Arsenic-Bearing Iron Ores by Calcification-Magnetic Roasting and Magnetic Separation Process

The mechanism of NOx removal in the sintering process based on source reduction of carbon emissions

Effect of Electroplating Sludge on the Iron Ore Sintering: Mineralization, Yield and Gaseous Emission

Contact Info

Product

Resources

About

The mechanism of NO_x removal in the sintering process based on source reduction of carbon emissions