Study on Recycling of Electric Arc Furnace Dust

Electric arc furnace steelmakers are finding that dealing with the dust is increasingly difficult. Stockpiling this dust on site, recycling or sending offsite for disposal all entail considerable difficulties and costs. Succesful recycle of the valuable metals (iron, zinc) present in electric arc furnace dust will result in resource conservation while simultanuously reducing the disposal problem. In this research, carbothermic reduction of electric arc furnace dust using coke has been performed to observe the reduction ability and volatilization rate of zinc. Several properties of the dust were determined using chemical analysis, differential scanning calorimetry (DSC), X-ray diffraction (XRD), etc. It was found that the dust contained 24 %mass of iron, 14 %mass of zinc which stayed in oxide form. Experimental results shown that rates of the volatilization zinc in the dust were high, e.g. 96.45% at 1100°C. The activation energy of the reduction was calculated to be 210.63 kJ/mol in temperature range of 900 to 1100°C. Futher study on effective collection of iron and volatile zinc oxide must be carried out to obtain a suitble procedure of recycle of the electric arc furnace dust.

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Synthesis of nanosized nickel zinc ferrite using electric arc furnace dust and ferrous pickle liquor

Scientific Reports ◽

10.1038/s41598-021-99697-9 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Ayman Galal ◽

Olfat Sadek ◽

Moataz Soliman ◽

Shaker Ebrahim ◽

M. Anas

Keyword(s):

Magnetic Properties ◽

Zinc Ferrite ◽

Electric Arc Furnace ◽

Electric Arc ◽

Arc Furnace ◽

X Ray ◽

Electric Arc Furnace Dust ◽

Nickel Zinc ◽

Ni Content ◽

Pickle Liquor

AbstractElectric arc furnace dust (EAFD) and waste pickle liquor (WPL); two major side products of the steel industry with negative environmental impact were used for the synthesis of nickel zinc ferrite (NZF); the important magnetic ceramic material of versatile industrial applications. The structural and magnetic properties of the prepared material were examined which showed good magnetic properties (high saturation magnetization and low coercivity) compared with those synthesized from pure reagents. In the applied process, nano sized nickel zinc ferrite (NZF) with a composition of Nix(Zn + impurities)1−xFe2O4 (where x = 0, 0.25, 0.5, 0.75 and impurities of manganese, magnesium, and calcium were prepared using zinc-containing electric arc furnace dust (EAFD) and waste pickle liquor (WPL). The chemical compositions of the prepared samples were determined using X-ray fluorescence (XRF) analysis. The optimum acetic acid concentration for EAFD treatment was found 2% v/v that decreased Ca content of EAFD by 70.6% without loss of Fe and Zn. The structural and morphological characterization was done by X-ray diffraction (XRD), Fourier transform infrared (FTIR) and Field Emission Scanning Electron Microscope (FESEM) to confirm the formation of Ni–Zn ferrite nanoparticles and estimate the particle sizes. The maximum saturation magnetization (Ms) of 73.89 emu/g was achieved at 0.5 Ni content and the minimum coercivity of 2.55 Oe was obtained at 0.25 Ni content.

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Leaching of valuable metals from electric arc furnace dust—Tetrabromobisphenol A pyrolysis residues

Journal of Analytical and Applied Pyrolysis ◽

10.1016/j.jaap.2017.04.019 ◽

2017 ◽

Vol 125 ◽

pp. 50-60 ◽

Cited By ~ 13

Author(s):

Mohammad Al-Harahsheh ◽

Mohannad Aljarrah ◽

Fahed Rummanah ◽

Kameel Abdel-Latif ◽

Sam Kingman

Keyword(s):

Electric Arc Furnace ◽

Electric Arc ◽

Tetrabromobisphenol A ◽

Arc Furnace ◽

Electric Arc Furnace Dust ◽

Valuable Metals

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Evaluation of the Addition of Electric Arc Furnace Dust in Hot Metal Changind the Type of the Crucible

Materials Science Forum ◽

10.4028/www.scientific.net/msf.798-799.594 ◽

2014 ◽

Vol 798-799 ◽

pp. 594-598

Author(s):

Vicente de Paulo Ferreira Marques Sobrinho ◽

José Roberto de Oliveira ◽

Estéfano Aparecido Vieira ◽

Victor Bridi Telles ◽

Felipe Fardin Grillo ◽

...

Keyword(s):

Electric Arc Furnace ◽

Electric Arc ◽

Size Analysis ◽

Arc Furnace ◽

Steel Mill ◽

X Ray Diffraction ◽

Hot Metal ◽

Electric Arc Furnace Dust ◽

Eds Microanalysis ◽

Fusion Experiments

This research aims to assess the incorporation of mass of the electric arc furnace dust (EAFD) by addition in hot metal (1.78% Si) at a temperature of 1,400°C changing the type of the crucible. The EAFD is from a steel mill producer of long steel. The EAFD will be added in the form of briquette. Previously, the EAFD is going to be characterized using the following techniques: chemical analysis, size analysis, X-ray diffraction, scanning electron microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) microanalysis. The achievement of fusion experiments in laboratory scale, is going to take place in a vertical tubular furnace with temperature control. The fusion experiments to assess the incorporation of the EAFD mass are going to use three kinds of crucibles. After cooling the furnace to room temperature, it will be done the hot metal and the slag weighing to do a mass balance. A flow of inert gas (argon) is going to be maintained inside the furnace during the experiments.

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Grain Size Effect in Elution Test of Electric Arc Furnace Slag

Applied Sciences ◽

10.3390/app10020477 ◽

2020 ◽

Vol 10 (2) ◽

pp. 477 ◽

Cited By ~ 1

Author(s):

Alessandro Riboldi ◽

Giovanna Cornacchia ◽

Marcello Gelfi ◽

Laura Borgese ◽

Annalisa Zacco ◽

...

Keyword(s):

Electric Arc Furnace ◽

Electric Arc ◽

Leaching Tests ◽

Arc Furnace ◽

X Ray Diffraction ◽

X Ray ◽

Lombardy Region ◽

Electric Arc Furnace Slag ◽

Test Requirements ◽

Furnace Slag

In this paper we discuss the effects of deslagging practices and the size of electric arc furnace (EAF) slags on structural, microstructural, composition and leaching tests. The samples were collected from seven steelmakers located in Brescia (Lombardy Region, Italy). Nine granularity fractions of four samples were tested to evaluate the influence of the granularity on the leaching tests. The results showed that, in general, the release of the elements arises when the size of the particle decreases, except in one sample, in which vanadium and zinc displayed the opposite trend. X-ray diffraction results suggest that behavior may be ascribed to the effect of the grinding, which causes a different percentage of the phases in the various fractions. In conclusion, the possible effects of the size should also be carefully considered when defining new leaching test requirements for EAF slags.

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Assessment of the Addition of Electric Arc Furnace Dust in Hot Metal at Temperature of 1,350 °C

Materials Science Forum ◽

10.4028/www.scientific.net/msf.820.588 ◽

2015 ◽

Vol 820 ◽

pp. 588-593

Author(s):

Vicente de Paulo Ferreira Marques Sobrinho ◽

José Roberto de Oliveira ◽

Estéfano Aparecido Vieira ◽

Victor Bridi Telles ◽

Felipe Fardin Grillo ◽

...

Keyword(s):

Electric Arc Furnace ◽

Electric Arc ◽

Size Analysis ◽

Arc Furnace ◽

Steel Mill ◽

X Ray Diffraction ◽

Hot Metal ◽

Electric Arc Furnace Dust ◽

Eds Microanalysis ◽

Fusion Experiments

This research aims to assess the incorporation of mass of the electric arc furnace dust (EAFD) by addition in hot metal produced in a local foundry (1.78% Si) at a temperature of 1,350°C. The EAFD is from a steel mill producer of long steel. The EAFD was added in the form of briquettes. Previously, the EAFD was characterized using the following techniques: chemical analysis, size analysis, X-ray diffraction, scanning electron microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) microanalysis. The achievement of fusion experiments in laboratory scale, took place in a vertical tubular furnace with temperature control. The fusion experiments to assess the incorporation of the EAFD mass used alumina crucibles. A flow of inert gas (argon) was maintained inside the furnace during the experiments. After cooling the furnace to room temperature, it was done the pig iron and the slag were weighed to do a mass balance to assess the efficiency of the experiments.

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Conversion of Electric Arc Furnace Dust into Ceramics Using Thermodynamic Calculations and Experimental Work

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.765.73 ◽

2018 ◽

Vol 765 ◽

pp. 73-78 ◽

Cited By ~ 1

Author(s):

Ahmad Mostafa ◽

Mohamed Shahtout ◽

Tariq Al Afeefi ◽

Mamoun Medraj

Keyword(s):

Ceramic Materials ◽

Electric Arc Furnace ◽

Electric Arc ◽

Test Method ◽

Thermodynamic Calculations ◽

Grain Size Analysis ◽

Arc Furnace ◽

Iron Oxide Particles ◽

X Ray ◽

Electric Arc Furnace Dust

Steelmaking is accompanied with releasing a large quantity of solid particle in the form of dust. Electric arc furnace dust (EAFD) is known to have high pH number and traces of heavy metals. The objective of this work was to find a suitable procedure for converting the dust waste into inert and useful byproducts using thermodynamic calculations and experimental investigation. The physical, chemical and mineralogical characteristics of initial EAFD were analyzed using different techniques, such as: X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), grain size analysis and metallography. The pH measurement procedure was carried out in accordance with the standard test method for pH of soils “ASTM 4972-95a”. The results of XRD, SEM and EDS analysis were consistent and showed that Fe2O3, CaO, Al2O3, SiO2, MgO, ZnO and traces of other oxides are in the main composition of the EAFD batches with different relative amounts. Furthermore, the particle size measurements revealed that the EAFD particles are in the 0.1 to 394 μm size range. The pH number was ranging between 11.15 and 12.21 for all measurements. The experimental results were used as input data for thermodynamic calculations and accordingly SiO2 and Al2O3 were among the candidates for making ceramic materials through forming glass regions that surround and encapsulate the iron oxide particles. SiO2 modified samples exhibited better apparent structural properties than other compositions. Whereas Al2O3-modified samples showed variation in the product color. Thus, it is concluded from this work that a mixture of EAFD can be modified by 5-20 wt.% of SiO2 and then fired at 1100°C to make inert ceramic materials with reasonable mechanical properties.

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Pyrometallurgical recovery of zinc and valuable metals from electric arc furnace dust – A review

Journal of Cleaner Production ◽

10.1016/j.jclepro.2021.126788 ◽

2021 ◽

Vol 298 ◽

pp. 126788

Author(s):

Jie Wang ◽

Yingyi Zhang ◽

Kunkun Cui ◽

Tao Fu ◽

Jianjun Gao ◽

...

Keyword(s):

Electric Arc Furnace ◽

Electric Arc ◽

Arc Furnace ◽

Electric Arc Furnace Dust ◽

Valuable Metals

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Utilization of Fly Ash, Red Mud, and Electric Arc Furnace Dust Slag for Geopolymer

Materials Science Forum ◽

10.4028/www.scientific.net/msf.841.157 ◽

2016 ◽

Vol 841 ◽

pp. 157-161 ◽

Cited By ~ 2

Author(s):

Andrie Harmaji ◽

Bambang Sunendar

Keyword(s):

Fly Ash ◽

Red Mud ◽

Sodium Hydroxide Solution ◽

Solid Material ◽

Electric Arc Furnace ◽

Electric Arc ◽

Arc Furnace ◽

X Ray Diffraction ◽

Electric Arc Furnace Dust ◽

Ambient Curing

Geopolymer is an aluminosilicate material that can be prepared from thermal activation of solid material containing alumina and silica as precursor and alkali activator solution. The precursor is an eco-friendly material and has a potency to replace Portland cement (cementless material). In this work, cementless geopolymer mortar was prepared by mixing fly ash as main precursors, red mud, and electric arc furnace dust slag, followed by addition of activator solution containing sodium hydroxide solution and waterglass. X-ray diffraction and Fourier transform infra-red spectroscopy demonstrated the formation of albite in geopolymer mortars, indicating that geopolymer mortars have been successfully formed. The best compressive strength of mortars was 72.80 MPa achieved by using fly ash and red mud with NaOH 12M under ambient curing.

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