Quantitative X‐Ray Fluorescence Determination of Elemental Composition of Micro‐Constituents Smaller than the Electron Probe Volume

Gesing, Adam J.; Marchwica, Paul; Lackie, Sharon; Sokolowski, J. H.

doi:10.1002/9781118659045.ch9

Cited by 2 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The scrap received in steel plants come from recycling industries where they undergo common pre-processing steps, which include collecting, sorting and mechanical preparation via techniques like magnetic separation, fragmentation, physical separation, and others [6]. Currently, the steel industry uses predominantly visual inspection to specify ferrous scrap and their quality when it arrives on site [7]. The personnel responsible for identifying contaminants like dirt, concrete, wood, plastic, electric motor, and metals other than steel mixed amongst the scrap pile needs extreme attention and trained eyes to determine the quality of the material.…”

Section: Inspection and Measurement Of Scrap Qualitymentioning

confidence: 99%

“…In recent, XRF hand-held analysers became more common for on-the-spot alloy identification in scrap yards [18]. Laser-induced breakdown spectroscopy (LIBS) uses a high-energy laser in the sample to emit a characteristic light, identifying the chemical composition of the sample [7,19,20]. The intensity of the light permits quantification [20].…”

Section: Inspection and Measurement Of Scrap Qualitymentioning

confidence: 99%

“…Another study by Noll et al presented an analysis of Cr, Ni, Mn and Mo in stainless steel sorting using LIBS applied to scrap on conveyor belts and found correct classification ranged from 98% to 83% for 4 different stainless steel scrap types [24]. This technology is currently being used commercially at steel shredders to separate Al scrap from non-ferrous metal concentrate [7].…”

Section: Inspection and Measurement Of Scrap Qualitymentioning

confidence: 99%

See 2 more Smart Citations

Monitoring of less-common residual elements in scrap feeds for EAF steelmaking

Miranda

Assis

Brooks

et al. 2019

Ironmaking & Steelmaking

View full text Add to dashboard Cite

The steel scrap quality is classified according to the amount of residual elements. However, there is a limited analysis of some of the less common residual elements such as antimony (Sb), tungsten (W), cobalt (Co), nickel (Ni) and molybdenum (Mo) mixed with steel scrap received by steel plants. This paper reports a historical analysis of these elements in the steel compositions from two steel plants, located in different regions, during 2011 to 2018, analysing around 21000 heats. The concentration of W and Sb dropped by 0.002%, due to the increasing recovery of non-ferrous metals from mixed scrap. It was found that the calibration and maintenance of the spectrometer used to analysis had a direct impact on the results. The presence of Sb, W and Co in the steel indicates contamination from other materials, since 80% of the use of these elements is in applications associated with non-ferrous materials. This is the first analysis of these elements in steel scrap reported the literature and the conclusion of the study is that more attention should be paid to monitor less common residuals elements, because analysis of these elements can provide information about the quality of the metal scrap.

show abstract

Section: Inspection and Measurement Of Scrap Qualitymentioning

confidence: 99%

Section: Inspection and Measurement Of Scrap Qualitymentioning

confidence: 99%

Section: Inspection and Measurement Of Scrap Qualitymentioning

confidence: 99%

See 1 more Smart Citation

Monitoring of less-common residual elements in scrap feeds for EAF steelmaking

Miranda

Assis

Brooks

et al. 2019

Ironmaking & Steelmaking

View full text Add to dashboard Cite

show abstract

Combined thermal, microstructural and microchemical analysis of solidification of Al25Si3Cu alloy

Guba

Gesing²,

Sokolowski

et al. 2017

Archives of Materials Science and Engineering

View full text Add to dashboard Cite

Purpose: This paper present thermal and microstructural and microchemical analyses were conducted on the unmodified experimental alloy Al20Si3Cu (B390.1) solidified in the High Temperature Universal Metallurgical Simulator and Analyser (HT UMSA) under atmospheric pressure (0.1 MPa) and a relatively low solidification rate (-1.2 K/s just after end of solidification), for identification of the thermal events during solidification and the phases in the as-cast structure. Design/methodology/approach: The HT UMSA platform, using a low thermal mass stainless steel cup, enabled the acquisition of high resolution thermal analysis data. Design/methodology/approach: A new approach for de-convolution of the first derivative thermal curves allowed detailed thermal and microstructural phase histories to be documented for solidification of Al-Si alloys. Recently developed SEM/EDS methodology allowed to determine composition and distribution of individual phases that are smaller than the X–ray volume. Findings: Simultaneous consideration of thermal microstructural and microchemical information allowed detailed understanding of the series of events that take place during solidification of Al casting alloy with complex chemistry. In our hypereutectic alloy we document growth of Al(1) dendrites and formation of secondary Si(2) and Al(2) phases all at temperatures higher than the binary equilibrium Al-Si eutectic temperature of 850 K. Practical implications: Even at this slow solidification rate detailed understanding of the solidification microstructure requires consideration of non-equilibrium processes during solidification. Originality/value: We propose an original set of hypotheses that consistently explain the observed non-equilibrium solidification behaviour. Proof of these hypotheses is beyond the scope of this work.

show abstract

Quantitative X‐Ray Fluorescence Determination of Elemental Composition of Micro‐Constituents Smaller than the Electron Probe Volume

Cited by 2 publications

References 5 publications

Monitoring of less-common residual elements in scrap feeds for EAF steelmaking

Monitoring of less-common residual elements in scrap feeds for EAF steelmaking

Combined thermal, microstructural and microchemical analysis of solidification of Al25Si3Cu alloy

Contact Info

Product

Resources

About