Stabilization of Electrical Arc Furnace Dust with Low-Grade MgO Prior to Landfill

Fernández, A. Inés; Chimenos, J.M.; Raventós, Neus; Miralles, L.; Espiell, F.

doi:10.1061/(asce)0733-9372(2003)129:3(275)

Cited by 32 publications

(18 citation statements)

References 5 publications

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“…But the single application of lime with the aim of S/S of the EAFD is problematic because lime increases the systems pH and this causes the re-solubilitization of Pb which is an important pollutant in the content of EAFD. On the other hand, MgO buffers the system pH between 9-10 interval which provides the minimum solubility for heavy metals (Salihoğlu 2007, Fernandez et al 2003. But according to literature survey it can be seen that there are very limited works for the usage of LG MgO in terms of S/S and the aim of this work is to improve this case.…”

Section: Introductionmentioning

confidence: 99%

Stabilization and solidification of electric arc furnace dust originating from steel industry by using low grade MgO

Bayraktar¹,

Avşar²,

Toröz³

et al. 2015

Archives of Environmental Protection

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Abstract:In this study, solidifi cation/stabilization (S/S) of electric arc furnace dust (EAFD) which is generated during the production of steel from scrap metals and classifi ed as hazardous waste were investigated by using different ratios of cement and low grade MgO (LG MgO) as binding agents. Type I PC 42.5 R portland cement and LG MgO which contains 70-80% MgO were used. S/S blocks that contain different ratios of binding agents which have 1/0.5 -1/1 -1/2 -1/3 -1/4 -1/5 cement/LG MgO ratio and S/S blocks which contain only cement and no LG MgO agents were prepared. These blocks, which contain 3 different waste ratios according to weight, 20%, 30% and 40% respectively, were produced and exposed to 28-day water purifi cation. At the end of the purifi cation process, S/S blocks were extracted using TCLP (Toxicity Characteristic Leaching Procedure) tests in order to determine the leaching behavior of Zn, Pb, and Cd in S/S blocks. By the end of this study, it was concluded that the recovery of EAFD is possible and applicable by immobilization. The fi ndings of the study concluded that environmental performances or structural properties of blocks contain 30% waste by weight are suitable. This method is a proper one for recovering and treatment of EAFD with mixture of cement and LG MgO.

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Section: Introductionmentioning

confidence: 99%

Stabilization and solidification of electric arc furnace dust originating from steel industry by using low grade MgO

Bayraktar¹,

Avşar²,

Toröz³

et al. 2015

Archives of Environmental Protection

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show abstract

“…Pereira et al [11] studied the stabilization of EAFD using coal fly ash as immobilizing agent. Fernandez et al [8] recommended low-grade MgO as a buffering agent in EAFD stabilization. Salihoglu et al [12] investigated the stabilization of EAFD of a steel foundry in Turkey by using Portland cement as the main binder and reported higher leaching levels than the USEPA landfilling limits.…”

Section: Introductionmentioning

confidence: 99%

“…Several researchers have studied the characteristics and/or stabilization of EAFD [6,[8][9][10][11][12][13][14][15]. Machado et al [6] carried out a chemical, physical, structural, and morphological characterization of the EAFD.…”

Section: Introductionmentioning

confidence: 99%

Effect of surface area during stabilization of electric arc furnace dusts from steel foundries

Salihoğlu

Pınarlı

2008

Environ. Prog.

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This study examined the effect of waste particle size on stabilization performance of hazardous electric arc furnace dusts (EAFD) from steel foundries through the measurement of the temperature rise during hydration and heavy metals leaching. EAFD was characterized by using scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray fluorescence (XRF), granulometry, and acid neutralization capacity (ANC) analysis. Portland cement was used to stabilize EAFD. Two types of paste samples, with EAFD content varying between 0% and 50% by weight, were prepared. The first type contained original EAFD, and the second contained ground EAFD with increased surface area. The increase in the temperatures of the mixes was monitored during the hydration reactions of the pastes. Ground EAFD yielded higher temperature rise rates than the original EAFD. Heavy metals leaching were determined by toxicity characteristics leaching procedure (TCLP). Pastes containing ground EAFD up to 50% yielded lower zinc and lead leaching than that of samples containing original EAFD. The results revealed that surface area of the EAFD may affect the stabilization performance and therefore care should be given to storage conditions at the foundries.

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“…However, in previous studies, the ratio of cement was much higher than hlime, hence; cement was used as the dominant binder in the mixtures. In the present study, CEMI-hlime 1:1 to 1:9 ratios were tested instead of 2:1 to 9:1 ratios as widely tested by many other researchers [16], [17], [18], [19]. Therefore, a weak strength development was expected due to the lack of cementitious characteristics in hlime.…”

Section: Pcmentioning

confidence: 99%

The environmental impact evaluation and testing of sustainable inorganic binders: A green alternative to ordinary Portland cement

Cubukcuoglu¹

2018

jscmt

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Sustainable alternative constituents to cement are required to reduce its detrimental impact on the environment. This study mainly focuses on the alternative materials to cement which are all derived as by-products from steel/iron and MgO manufacturing industry. These alternative materials have been popularised in the last few years for their effective usage in the environmental applications. Furnace steel slag, low grade MgO and pulverised fly ash are the materials proposed as cement replacement. The results of this study will be used to demonstrate the characteristics of alternative materials by means of both physical and chemical.

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Stabilization of Electrical Arc Furnace Dust with Low-Grade MgO Prior to Landfill

Cited by 32 publications

References 5 publications

Stabilization and solidification of electric arc furnace dust originating from steel industry by using low grade MgO

Stabilization and solidification of electric arc furnace dust originating from steel industry by using low grade MgO

Effect of surface area during stabilization of electric arc furnace dusts from steel foundries

The environmental impact evaluation and testing of sustainable inorganic binders: A green alternative to ordinary Portland cement

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