Characterisation of LD slag fines by X-ray Diffraction

Ashrit, Shrenivas; Banerjee, P. K.; Ghosh, Tamal; Venugopal, R.; Nair, Udayabhanu G.

doi:10.1051/metal/2015030

Cited by 11 publications

(7 citation statements)

References 13 publications

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“…In BOF slag, the most important mineral phases are dicalcium silicate, portlandite, merwinite, brownmillerite, di-calcium di-ferrite etc., as reported by Kourounis et al [5]. The chemical composition of unprocessed BOF Slag and mineral phases in the +2.0 mm, +0.25 mm and −0.25 mm non-metallic BOF Slag fines were studied in detail by S. Ashrit et al [4] and the details of which are provided in Tables 1 and 2.…”

Section: Characteristics Of Bof Slagmentioning

confidence: 82%

“…The main constituents of BOF slag are FeO, CaO, MgO, Al 2 O 3 , SiO 2 , Cr 2 O 3 , MnO, P 2 O 5 and free lime as studied by Motz and Geiseler [2]; Huang et al [3]; S. Ashrit et al [4]. In BOF slag, the most important mineral phases are dicalcium silicate, portlandite, merwinite, brownmillerite, di-calcium di-ferrite etc., as reported by Kourounis et al [5].…”

Section: Characteristics Of Bof Slagmentioning

confidence: 99%

“…[3]; S. Ashrit et al. [4]. In BOF slag, the most important mineral phases are dicalcium silicate, portlandite, merwinite, brownmillerite, di-calcium di-ferrite etc., as reported by Kourounis et al.…”

Section: Characteristics Of Bof Slagmentioning

confidence: 99%

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Nonmetallic LD slag fines – opportunities by invoking chemistry

Ashrit

Sarkar

Chatti

et al. 2019

Ironmaking & Steelmaking

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Linz-Donawitz (LD) or BOF (Basic Oxygen Furnace) Slag produced in the LD Process during steelmaking is one of the major threats to the steel producers worldwide. In general, BOF Slag undergoes physical separation to takeout the metallic portion and remaining non-metallic slag fine is dumped in open yard. This practice is becoming difficult in the present scenario due to the higher land cost and unavailability of land. Owing to the stability issue of steelmaking slag it's utilization in road making is very limited and only around 10% of production can be utilized in cement making due to high iron content. It is also used in the sinter making to recover iron value however, all these processes are not generating enough opportunities to utilize the entirety BOF slag generated from steel industries. The present article highlights the various conventional and non-conventional methods, till date, of utilization and value addition of BOF slag.

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Section: Characteristics Of Bof Slagmentioning

confidence: 82%

Section: Characteristics Of Bof Slagmentioning

confidence: 99%

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Nonmetallic LD slag fines – opportunities by invoking chemistry

Ashrit

Sarkar

Chatti

et al. 2019

Ironmaking & Steelmaking

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“…From this data it can be seen that of the total iron content, 50% is metallic in nature, which is recovered by a waste recycling plant (WRP) with the help of different steps like screening and magnetic separation. The separation and recovery of this metallic portion in the WRP is represented in Figure 1, wherein the non-metallic portion which is -6 mm in size is separately piled 1 . The typical composition of this non-metallic slag or reject fine is generally about 47-52% CaO, 2-13% free lime, 12-19% Fe, 1.5-2% P, 1.5-2% Al 2 O 3 and about 11-18% SiO 2 .…”

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“…It is believed that nanosized bioapatite (BAp), isolated or prepared from biogenic sources, is most appropriate for tissue replacement and regeneration. It exhibits enhanced resorbability and much higher bioactivity than micron-sized or synthetic hydroxyapatite (HAp) 1 .…”

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Application of ICP-MS Technique for Analysis of Heavy Metals in LD Slag Fines

et al. 2018

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Inductively coupled plasma-mass spectrometry (ICP-MS) is a powerful tool for analysing trace metals in environmental samples, industrial wastes and samples of biogenic nature. In the present study, this technique has been used to analyse the content of heavy metals in trace levels which specifically include elements like lead, cadmium, selenium and arsenic in LD slag fines. LD slag is the waste generated during the Linz-Donawitz steel making process or the basic oxygen furnace process. LD slag fines in the size range 0-6 mm are obtained after the recovery of metallic iron by means of physical separation in waste recycling plants, and are mostly recycled in sinter-making process. The non-metallic portion of LD slag fines is generally used as an aggregate in road construction, in acid mine drainage treatment and as an acidic soil conditioner. All these applications require a thorough analysis of trace and heavy metals as they can leach and penetrate into the soil and potentially contaminate it. The present study addresses this issue by analysing heavy metals in traces levels using ICP-MS. The analysis reveals that most of the heavy and hazardous elements are present in very low concentrations in the slag itself when compared with the EPA maximum allowed concentration in the leachate samples. However, the concentration of mercury in LD slag is more than the limit set by EPA in the leachate, and leachability of mercury needs to be studied further. The study also reveals that there are traces of platinum and palladium in the slag, indicating the requirement of future studies to understand their economic recovery.

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A Bogue approach applied to BOF slag

Zepper,

Schollbach,

van der Laan

et al. 2023

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An industrial by‐product of the steel industry called basic oxygen furnace (BOF) slag has recently undergone extensive research for high‐end applications outside of road load and landfill. In contrast to the Bogue methodology used with regular Portland cement, BOF slag lacks a quick and straightforward quantitative phase analysis procedure that would allow it to be employed as a high‐end raw material. The main phases of BOF slag (C2S, C2(A,F), Ff, RO‐Phase, and f‐C) can be calculated using the method presented in this paper based on chemical composition.

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Characterisation of LD slag fines by X-ray Diffraction

Cited by 11 publications

References 13 publications

Nonmetallic LD slag fines – opportunities by invoking chemistry

Nonmetallic LD slag fines – opportunities by invoking chemistry

Application of ICP-MS Technique for Analysis of Heavy Metals in LD Slag Fines

A Bogue approach applied to BOF slag

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