The use of EAF dust in cement composites: Assessment of environmental impact

Šturm, Tina; Milačić, Radmila; Murko, Simona; Vahčič, Mitja; Mladenovič, Ana; Šuput, Jerneja Strupi; Ščančar, Janez

doi:10.1016/j.jhazmat.2008.11.015

Cited by 32 publications

(12 citation statements)

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“…Istraživanja Šturma i sur. 43 provedena su na uzorcima u kojima je udjel prašine bio 0 %, 10 %, 15 % i 20 % u odnosu na cement, a ispitivane su vlačna i tlačna čvrstoća betona. Zaključeno je da sa svakim porastom udjela elektropećne prašine raste i čvrstoća betona te je po kvaliteti takav beton jednak tradicionalnoj smjesi pa čak i bolji.…”

Section: Uporaba Elektropećne Prašine U Graditeljstvuunclassified

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Elektropećna prašina kao vrijedan proizvodni ostatak iz procesa proizvodnje čelika

2018

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Sveučilište u Zagrebu, Metalurški fakultet, Aleja narodnih heroja 3, 44 103 Sisak Sažetak Iako je elektropećna prašina zbog prisutnosti teških metala svrstana u opasni otpad, može se iskoristiti u razne svrhe, što je prihvatljiviji način njezina zbrinjavanja nego što je odlaganje na za to predviđena odlagališta, čime metali prisutni u prašini ostaju neiskorišteni. U radu je dan pregled nastanka elektropećne prašine, njezinih fizikalno-kemijskih svojstava i moguće uporabe. Imajući u vidu fizikalno-kemijska svojstva prašine i visok sadržaj željeza, veoma je pogodno rješenje njezino vraćanje u matični proces za dobivanje čelika. Dodatno, prašina se može rabiti u industriji neželjeznih metala za dobivanje teških metala kao što je cink te u nekim drugim industrijama (npr. za proizvodnju cementa, keramike, boja, itd.).Although, due to the presence of heavy metals, electric arc furnace dust is classified as hazardous waste, it can be used for various purposes, which is a more acceptable way of disposing it than in a landfill where the metals in the dust remain unused. This paper presents a review of electric arc furnace dust, its physicochemical properties and possible use. With regard to the physicochemical properties of electric arc furnace dust and its high iron content, a very convenient solution is its return to the primary process of steel production. Furthermore, electric arc furnace dust can be used in the non-ferrous metal industry to obtain heavy metals, such as zinc, as well as in some other industries (e.g., cement, ceramics, paint, etc.).

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Section: Uporaba Elektropećne Prašine U Graditeljstvuunclassified

“…Najvažnijim faktorom kod stabilizacije elektropećne prašine smatraju se konačni pH eluata i obujam neutralizacije kiseline, čime su potvrđeni zaključci iz prijašnjih radova. Šturm i sur 43. proveli su istraživanje o utjecaju elektropećne prašine u cementu na okoliš.…”

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Elektropećna prašina kao vrijedan proizvodni ostatak iz procesa proizvodnje čelika

2018

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“…According to the WAC, hazardous wastes have to be pre-treated so as to meet the limits specified in the regulations prior to landfill disposal. Many different technologies have been developed for the pre-treatment of various types of hazardous waste, including; (1) additive to cement/concrete industry (de Vargas, Masuero, & Vilela, 2006), (2) recovery of valuable metals (iron, zinc and lead) before land disposal (MacRay, 1985) and (3) additive to asphalt cement (Alsheyab & Khedaywi, 2013;Šturm et al, 2009)). Among these available technologies solidification/stabilisation (S/S) has been accepted as the best demonstrated available technology due its ease of use and low cost (Conner, 1990).…”

Section: Introductionmentioning

confidence: 99%

Comparison of mechanical and leaching behaviours of pulverised fuel ash/low-grade magnesium oxide-cement blended stabilised/solidified baghouse dust

Cubukcuoglu

Ouki

2017

European Journal of Environmental and Civil Engineering

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This paper investigates the leaching potential of heavy metals present in stabilised/solidified (S/S) electric arc furnace dust (EAFD). Granular leaching test results showed that Mo was effectively stabilised by Portland cement type I (CEMI) and MgO at 1:2:7 and 3:12:35 ratios. Monolithic leaching test results showed that pulverised fuel ash (PFA) stabilised Zn and Pb but not Mo and Cl. MgO was highly effective in reducing Zn leaching. X-ray diffraction analysis revealed the presence of zinc ferrite in the solidified EAFD products which explains the excellent immobilisation of Zn. The leaching mechanisms analysis demonstrated that few S/S samples exhibited a leaching behaviour dominated by diffusion with the majority displaying a leaching mode dominated by depletion. Although the monoliths' physical integrity was maintained, Pb, Cl and Mo were not effectively immobilised with PFA and MgO-based systems based on the current granular and monolith leaching test protocols.

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“…Due to long‐term disposal, many landfills are overloaded and thus represent a latent environmental threat. It is well known that some waste materials from the steel‐making industry can be recycled (Geiseler, 1996; Makkonen et al, 2002), or reused (Shi and Qian, 2000; Motz and Geiseler, 2001; Lind et al, 2001; Pioro and Pioro, 2004; Sobolev, 2005; Vieira et al, 2006; Chaurand et al, 2007; Das et al, 2007; Mladenovič et al, 2008; Vahčič et al, 2008; Šturm et al, 2009) in numerous applications, mostly in civil engineering. Among these types of waste, EAF steel slag is produced in the highest amounts and is of the best quality.…”

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confidence: 99%

“…To estimate the long‐term environmental impact, leaching tests based on diffusion were proposed in the Dutch NEN 7345 standard (NEN 7345, 1995) and applied in the leaching protocol developed for concrete (Hohberg et al, 2000). A similar leaching protocol has also been used to evaluate the environmental acceptability of asphalt mixes with the addition of EAF dust (Vahčič et al, 2008) and to assess the environmental impact of the use of EAF dust in cement composites (Šturm et al, 2009). Electric arc furnace steel slag is widely used worldwide as a high‐quality aggregate in road construction, for unbound and asphalt layers (Motz and Geiseler, 2001; Lind et al, 2001; Chaurand et al, 2007; Das et al, 2007; Mladenovič et al, 2008).…”

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Environmental Impacts of Asphalt Mixes with Electric Arc Furnace Steel Slag

et al. 2011

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Electric arc furnace (EAF) steel slag can be used as an alternative high-quality material in road construction. Although asphalts with slag aggregates have been recognized as environmentally acceptable, there is a lack of data concerning the potential leaching of toxic Cr(VI) due to the highly alkaline media of EAF slag. Leaching of selected water extractable metals from slag indicated elevated concentrations of total chromium and Cr(VI). To estimate the environmental impacts of asphalt mixes with slag, leachability tests based on diffusion were performed using pure water and salt water as leaching agents. Compact and ground asphalt composites with natural aggregates, and asphalt composites in which the natural aggregates were completely replaced by slag were prepared. The concentrations of total chromium and Cr(VI) were determined in leachates over a time period of 6 mo. After 1 and 6 mo, the concentrations of some other metals were also determined in the leachates. The results indicated that chromium in leachates from asphalt composites with the addition of slag was present almost solely in its hexavalent form. However, the concentrations were very low (below 25 μg L) and did not represent an environmental burden. The leaching of other metals from asphalt composites with the addition of slag was negligible. Therefore, the investigated EAF slag can be considered as environmentally safe substitute for natural aggregates in asphalt mixes.

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The use of EAF dust in cement composites: Assessment of environmental impact

Cited by 32 publications

References 32 publications

Elektropećna prašina kao vrijedan proizvodni ostatak iz procesa proizvodnje čelika

Elektropećna prašina kao vrijedan proizvodni ostatak iz procesa proizvodnje čelika

Comparison of mechanical and leaching behaviours of pulverised fuel ash/low-grade magnesium oxide-cement blended stabilised/solidified baghouse dust

Environmental Impacts of Asphalt Mixes with Electric Arc Furnace Steel Slag

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