Steel Manufacturing EAF Dust as a Potential Adsorbent for Hydrogen Sulfide Removal

Frilund, Christian; Kotilainen, Minna; Lorenzo, José Barros; Lintunen, Pertti; Kaunisto, Kimmo

doi:10.1021/acs.energyfuels.1c04235

Cited by 7 publications

(3 citation statements)

References 44 publications

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“…The particle size distribution and microstructure of EAFD Table .1 (Halli et al 2017;Lozano-Lunar et al 2019;Laubertova et al 2020a;Ahmad et al 2022;Borda and Torres 2022;Chen et al 2022;Coleti et al 2022;Frilund et al 2022;Grudinsky et al 2022;Gómez-Marroquín et al 2022;He et al 2022;Zoraga et al 2022;Ordoñez et al 2022;Qiu et al 2023;Li et al 2023) presents a comprehensive overview of EAFD compositions from various recent studies conducted in different countries. As technology advances, the distinction between zinc content levels determined by the place of production becomes less clear.…”

Section: Figure2mentioning

confidence: 99%

Recent Developments on the Removal of Zinc from Electric Arc Furnace Dust by Using Microwave Heating

Xiong

Kai

Qiu

et al. 2023

Preprint

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Electric arc furnace dust (EAFD) is a hazardous by-product of steel production. As global steel output increases, substantial amounts of EAFD are produced, which causes significant environmental issues. EAFD contains amounts of Fe and Zn, which could be reused as raw materials in the steelmaking process. However, zinc oxides can be reduced and vaporized during this process, forming zinc vapor that contaminates equipment surfaces and causes damage. Consequently, various pyrometallurgical methods have been proposed for zinc removal from EAFD. Due to the extensive usage of carbonaceous materials, these methods contribute to significant CO2, raising concerns about greenhouse gas emissions. Microwave heating offers an efficient, energy-saving, and environmentally friendly alternative to pyrometallurgical approaches. EAFD can generate heat under microwave irradiation without carbon addition, which means the CO2 emissions can be reduced by replacing the reductant in the microwave heating process. Furthermore, microwaves enhance zinc removal reactions to a certain extent, resulting in higher efficiency. Thus, employing microwave heating for EAFD processing has significant potential for future development. This paper reviews recent research on using microwave heating for zinc removal from EAFD, focusing on the heating behavior of EAFD in microwaves and the mechanisms of zinc removal. This review will be crucial for researchers working on processing EAFD using microwave heating and could help guide the development of more sustainable and efficient methods.

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Section: Figure2mentioning

confidence: 99%

Recent Developments on the Removal of Zinc from Electric Arc Furnace Dust by Using Microwave Heating

Xiong

Kai

Qiu

et al. 2023

Preprint

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“…EAFD can be used in agriculture for soil deoxidation due to the content of oxides of alkali and alkaline earth metals [11]. Due to the relatively high content of zinc oxide, dust can be a low-cost and effective H 2 S adsorbent [12]. Additionally, it can be used as a filler to improve the mechanical properties of polymer composites, such as tensile strength and hardness similar to fly ash particles [13,14], as well as reducing flammability.…”

Section: Introductionmentioning

confidence: 99%

Composite High-k Films Based on Polyethylene Filled with Electric Arc Furnace Dust and MWCNT with Permittivity Synergetic Effect

et al. 2023

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The production of three-phase composites is a relevant and effective approach to obtain materials with the required mechanical and dielectric properties. In this work, dust, which is a waste product of steelmaking and is formed during the gas cleaning of electric arc furnaces at the production base of Severstal, was used as a functional filler for the low-density polyethylene polymer matrix. The fractional, elemental, qualitative, and quantitative phase composition of the native dust was studied using laser diffraction, energy-dispersive X-ray phase analysis, and X-ray fluorescence spectrometry. An increase in the permittivity of the dust was achieved due to its reduction in a hydrogen atmosphere and, as a consequence, a change in the elemental and phase composition causing an increase in the concentration of metallic iron. Composite films were obtained using a blending roll mill at temperatures of 130 and 140 °C. The concentration of the main filler was 18.75, 37.5, and 75 wt.%. Additionally, a conductive additive in the form of MWCNTs was introduced into the composition of the composites in an amount of 0.25 wt.%. The uniformity of the filler distribution in the polymer matrix was assessed from electron micrographs. The dielectric properties of fillers and composite films based on polyethylene filled with electric arc furnace dust and MWCNTs were studied using impedance spectroscopy in the frequency range of 10–106 Hz. The use of reduced dust at a concentration of 25.8 vol.% combined with 0.25 wt.% MWCNTs in the composition of the composite film provided an increase in ε′ to 13.5 at tan δ = 0.038. Thus, three-phase polymer matrix composites based on LDPE using dust as a filler with a conductive microadditive of MWCNTs have a synergistic effect, which manifests itself in an increase in the permittivity and a decrease in dielectric losses.

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“…Gaseous sulfur emitted from industrial production processes from industries such as chemical, metallurgical, and power industries is one of the culprits that endanger the natural environment and human health. − Hence, environmental protection regulations for gaseous sulfide emissions from industrial production processes are becoming increasingly stringent all over the world. Blast furnace gas (BFG), as a combustible by-product of the ironmaking process, is an important secondary energy.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis Behavior of Pyrite under a CO–H₂ Atmosphere

et al. 2022

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The transformation behavior of pyrite (FeS 2 ) in the blast furnace process is critical to control the formation and emission of gaseous sulfides in the top gas of ironmaking but has seldom been explored. In present work, the pyrolysis of pyrite from 200 to 900 °C under a CO–H 2 atmosphere was investigated by thermal-gravimetric and mass spectrometry. The thermodynamic theoretical calculations were carried out to further understand the transformation process. The results show that FeS 2 is almost completely reduced to FeS under various CO–H 2 atmospheres. H 2 S and carbonyl sulfide (COS) are the main gaseous sulfides formed through the pyrolysis reactions of FeS 2 under a CO–H 2 atmosphere. A higher H 2 concentration can reduce the pyrolysis reaction temperature of FeS 2 , which is favorable for the conversion of sulfides to H 2 S, while a higher CO concentration promotes the conversion of sulfides to COS. Besides, the pyrolysis products of FeS 2 by order from the former to latter under a strong reductive atmosphere (CO–H 2 ) with increasing temperature are as follows: COS → S → H 2 S → S 2 → CS 2 .

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Steel Manufacturing EAF Dust as a Potential Adsorbent for Hydrogen Sulfide Removal

Cited by 7 publications

References 44 publications

Recent Developments on the Removal of Zinc from Electric Arc Furnace Dust by Using Microwave Heating

Recent Developments on the Removal of Zinc from Electric Arc Furnace Dust by Using Microwave Heating

Composite High-k Films Based on Polyethylene Filled with Electric Arc Furnace Dust and MWCNT with Permittivity Synergetic Effect

Pyrolysis Behavior of Pyrite under a CO–H₂ Atmosphere

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Steel Manufacturing EAF Dust as a Potential Adsorbent for Hydrogen Sulfide Removal

Cited by 7 publications

References 44 publications

Recent Developments on the Removal of Zinc from Electric Arc Furnace Dust by Using Microwave Heating

Recent Developments on the Removal of Zinc from Electric Arc Furnace Dust by Using Microwave Heating

Composite High-k Films Based on Polyethylene Filled with Electric Arc Furnace Dust and MWCNT with Permittivity Synergetic Effect

Pyrolysis Behavior of Pyrite under a CO–H2 Atmosphere

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Pyrolysis Behavior of Pyrite under a CO–H₂ Atmosphere