Interactions of Non‐Metallic Inclusions with Steel and Slag: Thermodynamic Modeling, Experiments and Metallographic Analyses

Michelic, Susanne Katharina; Hartl, Mario; Bernhard, Christian

doi:10.1002/9781118495285.ch78

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…High temperature confocal scanning laser microscopy (HT‐CSLM) offers a new approach for investigations at temperatures relevant to steelmaking processes. Based on the pioneer work done by Japanese researchers, this method is applied for the investigation of phase transformations as well as inclusion related questions like particle agglomeration in the liquid steel or reactions of inclusions with slag and refractory material . Meanwhile, also several publications dealing with the use of HT‐CSLM for dissolution studies exist .…”

Section: Introductionmentioning

confidence: 99%

Study on Oxide Inclusion Dissolution in Secondary Steelmaking Slags using High Temperature Confocal Scanning Laser Microscopy

Michelic

Goriupp

Feichtinger

et al. 2015

steel research int.

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High temperature confocal scanning laser microscopy (HT‐CSLM) is used to study the dissolution behavior of Al2O3 inclusions in various slag compositions in the system CaO‐Al2O3‐SiO2‐MgO. This method enables the in situ observation of the dissolution at steelmaking temperatures. The change of the diameter of the spherical inclusion is measured by image analysis of pictures obtained from the HT‐CSLM. Subsequently, dissolution rates and normalized dissolution curves are determined, and the governing dissolution mechanism is identified by the use of a modified approach of the diffusion equation introduced by Feichtinger et al. and compared with the dissolution of SiO2 previously reported by the same authors. Finally, effective binary diffusion coefficients are calculated. Slag viscosity is shown to essentially affect the dissolution behavior, changing the normalized dissolution pattern from rather S‐shaped (high slag viscosity) to a parabolic form (low slag viscosity).

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Section: Introductionmentioning

confidence: 99%

Study on Oxide Inclusion Dissolution in Secondary Steelmaking Slags using High Temperature Confocal Scanning Laser Microscopy

Michelic

Goriupp

Feichtinger

et al. 2015

steel research int.

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Effect of Secondary Vacuum Treatment on Performance Characteristics of A516 Grade 65 Carbon Steel

Ciocan

Tudor

2017

AMR

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The purpose of this research is to analyze the making technology of clean steel used in the oil, gas and petrochemical industry. The steel was obtained into conventional electric arc furnace. To enhance the steel quality a secondary refining treatment was applied. The purity characteristics of the steel A516 Grade 65, before and after the treatment in the vacuum arc degassing equipment are discussed and compared. The deoxidation, desulphurisation in the presence of basic slag and degassing by injecting an inert gas and also by vacuum exposure are effective in reducing non-metallic inclusions and for chemical composition control. Data from 31 melts obtained in two industrial conditions are presented according to steel making parameters. The variation of chemical composition, especially of content of S, P, and the cleanliness of the steel in terms of content of non-metallic inclusions are analyzed.

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Interactions of Non‐Metallic Inclusions with Steel and Slag: Thermodynamic Modeling, Experiments and Metallographic Analyses

Cited by 2 publications

References 5 publications

Study on Oxide Inclusion Dissolution in Secondary Steelmaking Slags using High Temperature Confocal Scanning Laser Microscopy

Study on Oxide Inclusion Dissolution in Secondary Steelmaking Slags using High Temperature Confocal Scanning Laser Microscopy

Effect of Secondary Vacuum Treatment on Performance Characteristics of A516 Grade 65 Carbon Steel

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