Selective Zinc Removal from Electric Arc Furnace (EAF) Dust by Using Microwave Heating

Omran, Mamdouh; Fabritius, Timo; Heikkinen, Eetu‐Pekka

doi:10.1007/s40831-019-00222-0

Cited by 33 publications

(16 citation statements)

References 30 publications

(44 reference statements)

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“…In previous studies, zinc was represented as the major element among all other elements in EFAD, with a value between 7 and 40 wt%. 2,23,24 However, in the present study, the amount of zinc is about 0.4 wt%, which is significantly lower compared with reported previous works.…”

Section: The Adsorbent Characterizationcontrasting

confidence: 90%

Magnetic adsorbent based on the electric arc furnace dust for the removal of methylene blue dye from aqueous solution

Shamsi

Mohamadi

Zamani

et al. 2021

Env Prog and Sustain Energy

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There are different solutions to manage industrial sewage, and recently reusing the useful materials in sewage is a trending topic among environmentalists. In this study, electric arc furnace dust (EAFD), a by-product of the steelmaking industry, and finding a way to it reuse will be the main topic of this article. EAFD with 37% iron (Fe) content as the magnetic adsorbents has a good ability to treat contaminated water. The batch method was used to evaluate the effective parameters for removing methylene blue with a magnetic adsorbent, such as the initial concentrations of dye, the pH of the solution, time dependency, and the amount of adsorbent. The results showed that 3 g of the adsorbent could remove 93 ± 1% of the methylene blue from the 100 ml of an aqueous solution with an initial concentration of 5 ppm during 20 min at pH = 6. Kinetic data and the adsorption isotherms were better fitted with the pseudo-second-order model (R 2 = 0.99) and Freundlich models (R 2 = 0.97), respectively, which confirmed the chemisorption. The real sample's recovery results with three replicate confirmed the MB removal was dramatically reduced by more than 80%.

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Section: The Adsorbent Characterizationcontrasting

confidence: 90%

Magnetic adsorbent based on the electric arc furnace dust for the removal of methylene blue dye from aqueous solution

Shamsi

Mohamadi

Zamani

et al. 2021

Env Prog and Sustain Energy

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“…In particular, to recover zinc from EAF dust, present in the form of franklinite (60%), a study based on ultrasound-assisted leaching process has been carried out [26]. In addition, to investigate the selective zinc removal from EAF dust, the microwave heating oven has been used as a heat source [27]. Recovery of zinc from the pre-treatment of coated steel scrap before it is fed to the EAF has also been deeply investigated [28].…”

Section: Industrial Symbiosis In the Steel Sectormentioning

confidence: 99%

Reuse and Recycling of By-Products in the Steel Sector: Recent Achievements Paving the Way to Circular Economy and Industrial Symbiosis in Europe

Branca

Colla

Algermissen

et al. 2020

Metals

152

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Over the last few decades, the European steel industry has focused its efforts on the improvement of by-product recovery and quality, based not only on existing technologies, but also on the development of innovative sustainable solutions. These activities have led the steel industry to save natural resources and to reduce its environmental impact, resulting in being closer to its “zero-waste” goal. In addition, the concept of Circular Economy has been recently strongly emphasised at a European level. The opportunity is perceived of improving the environmental sustainability of the steel production by saving primary raw materials and costs related to by-products and waste landfilling. The aim of this review paper was to analyse the most recent results on the reuse and recycling of by-products of the steelmaking cycles as well as on the exploitation of by-products from other activities outside the steel production cycle, such as alternative carbon sources (e.g., biomasses and plastics). The most relevant results are identified and a global vision of the state-of-the-art is extracted, in order to provide a comprehensive overview of the main outcomes achieved by the European steel industry and of the ongoing or potential synergies with other industrial sectors.

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“…Due to the difference of microwave absorption of various useful minerals and gangue minerals, different heating efficiencies will appear during microwave heating. The ores will generate cracks by the thermal stress, which will promote the dissociation of useful mineral monomers and improve the recovery of target metals [35][36][37][38][39]. Therefore, microwaves can be used as an alternative energy source of conventional heating to process ZMR in a more energy-saving and environmental protection approach [40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Leaching of Zinc from Zinc-Containing Metallurgical Residues via Microwave Calcium Activation Pretreatment

Zheng

Gao

et al. 2021

Metals

Self Cite

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Given the shortage of zinc resource, the low utilisation efficiency of secondary zinc resource, and the crucial problem that the synchronous dissolution of zinc from different mineral phases, an activation pretreatment method merged with calcium activation and microwave heating approach was proposed to enhance the zinc leaching from complex encapsulated zinc-containing metallurgical residues (ZMR). Results indicated that under the optimal pretreatment conditions, including microwave activation temperature of 400 °C, CaO addition of 25% and activation time of 20 min, the zinc leaching rate reached 91.67%, which was 3.9% higher than that by conventional roasting pretreatment. Meanwhile, microwave heating presents excellent treatment effects, manifested by the zinc leaching rates, all exceeding that of conventional roasting under the same conditions, while the process temperature is decreased by 200 °C. In addition, XRD and SEM-EDS analysis denoted that microwave calcification pretreatment can effectively promote the transformation of the refractory zinc minerals like Zn2SiO4 and ZnFe2O4 into the easily leachable zinc oxides. The distinctive selective heating characteristics of microwave heating strengthened the dissociation of mineral inclusion, and the generated cracks increased the interfacial reaction area and further enhancing the leaching reaction of zinc from ZMR.

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Selective Zinc Removal from Electric Arc Furnace (EAF) Dust by Using Microwave Heating

Cited by 33 publications

References 30 publications

Magnetic adsorbent based on the electric arc furnace dust for the removal of methylene blue dye from aqueous solution

Magnetic adsorbent based on the electric arc furnace dust for the removal of methylene blue dye from aqueous solution

Reuse and Recycling of By-Products in the Steel Sector: Recent Achievements Paving the Way to Circular Economy and Industrial Symbiosis in Europe

Enhanced Leaching of Zinc from Zinc-Containing Metallurgical Residues via Microwave Calcium Activation Pretreatment

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