Evaluation of environmental compatibility of EAFD using different leaching standards

Sebag, M.G.; Korzenowski, Christa; Bernardes, A.M.; Vilela, Antônio Cezar Faria

doi:10.1016/j.jhazmat.2008.11.125

Cited by 34 publications

(13 citation statements)

References 11 publications

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“…For the pilot-scale investigation an adapted version of the French AFNOR X31-210 leaching procedure at lab-scale (Sebag et al, 2009) was developed. This test does not use an acid source (to obtain a pH = 5) which could greatly overestimate the leaching potential of a waste.…”

Section: Pilot-scale Investigationmentioning

confidence: 99%

Leaching behaviour of different scrap materials at recovery and recycling companies: Full-, pilot- and lab-scale investigation

et al. 2014

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Section: Pilot-scale Investigationmentioning

confidence: 99%

Leaching behaviour of different scrap materials at recovery and recycling companies: Full-, pilot- and lab-scale investigation

et al. 2014

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“…Therefore, classification by particle size could be a feasible process to reduce such components in the bulk of the dust by separating off the finest fractions. Because of the fineness of the dusts it is not possible to apply sieving for classification. However, air classification can be used to classify such fine dusts .…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Air Classification in Dust Recycling in the Iron and Steel Industry

Lanzerstorfer

Angerbauer

Gaßlbauer

2018

steel research int.

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The potential of air classification of dusts from dry off‐gas cleaning for improved recycling of these dusts is investigated. By air classification, a dust can be separated into a coarse fraction and a fine fraction. Some components which are usually unwanted in recycled dust like alkali chlorides and Zn and Pb are often enriched in the fine dust fraction. Thus, air classification of dust before recycling will allow recycling of an increased amount of dust and, thereby reduce the amount of dust which has to be sent to landfill. The feasibility of such treatment is studied on the basis of estimated investment costs and operating costs. The main factors affecting the feasibility of such a treatment are the capacity of the unit, the cost of landfill of the respective dust, and the fraction of dust which can additionally be recycled after the treatment. The investigation of classification of BF dusts and sinter plant dust shows that economic operation can be reached under the assumed conditions at landfill costs above 35–60 EUR/t for BF dust and 90 EUR/t for sinter plant dry desulfurization and de‐dusting residue. The integration of air classification into EAF dust in‐plant recycling can be feasible, too.

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“…Considering that for each ton of steel produced are generated 150 kg of steelmaking slag, approximately 210 million tons of such waste were produced in 2010 6,7 . The production of steel from electric arc furnaces has expanded due to the higher availability of steel scrap, which is the main component of the production charge 8 . Steelmaking slag is the result of an aggregation of several elements which the presence is not important on steel making process.…”

Section: Introductionmentioning

confidence: 99%

Recovery of Steelmaking Slag and Granite Waste in the Production of Rock Wool

Alves¹,

Espinosa

Tenório

2015

Mat. Res.

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Steelmaking slag and residues from granite cuttings are industrial wastes with considerable production, however limited applications. This work studied an inertization and recovery process of such wastes as raw materials into production of rock wool (i.e. a thermo-acoustic insulator with growing market). Several batches were produced aiming the chemical proprieties of a currently marketed rock wool. Mixtures were casted at temperatures of 1400-1500 °C, then quenched in water and also poured into a Herty Viscosimeter. Produced materials with thickness smaller than 500µm were characterized by chemical analyses, XRD, SEM, EDS and DTA. ThermoCalc software was used to simulate the cooling curves of rock wools. Results showed that incorporation of wastes does not affect the main qualities of rock wool, the thermal insulation and prevention of fire spread. Raw material batches of rock wools may assimilate up to 66% of granite waste, or 53% steelmaking slag, or 70% combining both materials.

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Evaluation of environmental compatibility of EAFD using different leaching standards

Cited by 34 publications

References 11 publications

Leaching behaviour of different scrap materials at recovery and recycling companies: Full-, pilot- and lab-scale investigation

Leaching behaviour of different scrap materials at recovery and recycling companies: Full-, pilot- and lab-scale investigation

Feasibility of Air Classification in Dust Recycling in the Iron and Steel Industry

Recovery of Steelmaking Slag and Granite Waste in the Production of Rock Wool

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