ZEWA – metallurgical process for treatment of residues from steel industry and other industrial sectors to generate valuable products

Fleischanderl, Alexander; Gennari, Udo; Ilie, Aura

doi:10.1179/irs.2004.31.6.444

Cited by 15 publications

(7 citation statements)

References 2 publications

(1 reference statement)

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“…When the slag also contains free MgO or MgO based compounds, the above phenomena are coupled with a retarded hydration which, in general, occurs when these products are present in mortars or concrete [2,3]. In order to obtain sufficient stability, various methods have been proposed like long time weathering of the granulated slag outside the slag pits, treatment of the liquid slag by injecting oxygen and silica, autoclaving of the slag in slag baskets [4,5], and others [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Long Term Compression Strength of Mortars Produced Using Coarse Steel Slag as Aggregate

Furlani

Maschio

2016

Advances in Civil Engineering

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The paper reports on some experimental results obtained from the production of mortars prepared using a commercial cement, coarse steelmaking slag, superplasticizer, and water. The behaviour of this reference composition was compared to that of some others containing further additives in order to investigate materials compressive strength after long time ageing. It has been demonstrated that an optimized water/cement ratio coupled with slag particles of size lower than 2.5 mm and proper protocol of preparation leads to the production of materials with good mechanical properties after 28, 90, and 180 days of ageing. The resulting materials therefore appeared as good candidates for civil engineering applications. However, the present research also demonstrates that the mortar samples of all of the compositions prepared suffer from decay and compressive strength decrease after long time ageing in water. In the present paper the results are explained taking account of materials residual porosity and alkali silica reaction which occurs in the samples.

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Section: Introductionmentioning

confidence: 99%

Long Term Compression Strength of Mortars Produced Using Coarse Steel Slag as Aggregate

Furlani

Maschio

2016

Advances in Civil Engineering

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“…zero speed, ambient temperature and stable constituents (Ma, 2014). Many post-process separation technologies have been discussed, developed and tested, such as carbonaceous thermal reduction separation with rotary kilns (Ruetten, 2006), rotary hearth furnaces (McClelland, 2002), electric arc furnaces (Fleischanderl and Daum, 2006), shaft furnaces (BartelsvonVarnbüler et al, 2002) and multiple hearth furnaces (Roth et al, 2001). Separation of zinc from BOF OG solid wastes by acidic leaching has also been studied (Kelebek et al, 2004;Trung et al, 2011).…”

Section: Introductionmentioning

confidence: 98%

Recycling of basic oxygen furnace steelmaking dust by in-process separation of zinc from the dust

2016

Journal of Cleaner Production

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“…In addition, the volumetric instabilities can be combined with a retarded hydration when slags containing free MgO or MgO-based compounds are used in the production of mortars or concretes [2][3][4][5]. It is generally accepted that a better stability could be obtained when the slag is pre-treated by different methods such as long time weathering of the granulated slag outside the slag pits, treatment of the liquid slag by injecting oxygen and silica, autoclaving of the slag in baskets [6,7] and others [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Production and Compression Strength of Mortars Containing Unprocessed Waste Powdered Steel Slag

et al. 2017

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This paper deals with the production of mortars prepared using a commercial CEMIIB-S 42.5N cement, a natural aggregate, steelmaking slag, a superplasticizer and water. The as-received unprocessed steel slag was milled by a hammer mill and then sieved to obtain batches with different maximum particle size. Each batch was used, together with the other components, in the production of mortars which were tested, by compression and water absorption, after different aging times in order to evaluate their long term stability. Several slag-free samples were also prepared as reference materials. All mortars were prepared with fixed aggregate/cement ratio (6/1), superplasticizer/cement ratio (s/c) and water/cement ratio (w/c). It has been demonstrated that an adequate protocol for the preparation and the use of slag containing particles with 2500 µm maximum size lead to the production of materials with mechanical properties suitable for civil engineering applications after aging for 28, 90 and 180 days. However, samples containing slag particles with size equal or greater than 1000 µm display a decay of mechanical properties after longer aging in water or after accelerated aging.

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ZEWA – metallurgical process for treatment of residues from steel industry and other industrial sectors to generate valuable products

Cited by 15 publications

References 2 publications

Long Term Compression Strength of Mortars Produced Using Coarse Steel Slag as Aggregate

Long Term Compression Strength of Mortars Produced Using Coarse Steel Slag as Aggregate

Recycling of basic oxygen furnace steelmaking dust by in-process separation of zinc from the dust

Production and Compression Strength of Mortars Containing Unprocessed Waste Powdered Steel Slag

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