Formation and Evolution of Non-Metallic Inclusions during Deoxidation by Al Addition in BOF Crude Steel

Chi, Yunguang; Deng, Zhiyin; Zhu, Miaoyong

doi:10.1002/srin.201600218

Cited by 13 publications

(5 citation statements)

References 30 publications

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“…(5)). Similar results are also reported in an earlier study 30) by the present authors. Therefore, the main type of inclusions are alumina inclusions before LF refining (Type 1 and Type 2) as given in Table 4 and Fig.…”

Section: Evolution Of Inclusions In Medium Mn Steelsupporting

confidence: 93%

Formation and Evolution of Non-metallic Inclusions in Medium Mn Steel during Secondary Refining Process

2017

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Section: Evolution Of Inclusions In Medium Mn Steelsupporting

confidence: 93%

Formation and Evolution of Non-metallic Inclusions in Medium Mn Steel during Secondary Refining Process

2017

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“…5. At the same time, Chi et al 56) investigated the inclusions in crude steel of BOF converter, and also found some MgO islands in calcium silicate inclusions. According to their study, these MgO islands transformed into MgO•Al 2 O 3 spinel islands in calcium aluminates during deoxidation by Al.…”

Section: Formation Of Spinel Inclusions From Mgomentioning

confidence: 96%

Formation, Evolution and Removal of MgO·Al<sub>2</sub>O<sub>3</sub> Spinel Inclusions in Steel

et al. 2021

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MgO•Al 2 O 3 spinel inclusions are generally found in steel, and required be controlled during steelmaking process due to the influences on continuous casting and the quality of final products. The present review aims to give an overall picture on the formation, evolution and removal of spinel inclusions. In this review, the reported formation mechanisms are reclassified, and the effects of Ca, Ti and Mn as well as rare earth on the evolution of spinel inclusions are summarized. Different methods with thermodynamic data sheets are also introduced for the calculation of phase stability diagram. To explain the evolution route of inclusions in industry, the sources and the formation kinetics of dissolved Mg and Ca are discussed. In addition, the agglomeration, separation and dissolution behaviors of spinel inclusions are considered, and the advantages of spinel inclusions are also addressed. Based on literature survey, some suggestions on the control of inclusions are given as well.

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“…inclusions. [43][44][45][46][47] Although [Al] partially and even completely replaces [Ca] and [Mg] in Al-Ca-Mg-O composite inclusion with the aluminum concentration increasing in steel liquid, [Ca] and [Mg] could enter steel liquid from slag, which may inhibit the formation of high-hardness Al 2 O 3 inclusion in steel liquid. [48] The sulfur content in the steel liquid first increases, which may promote the formation of Al-Mg-O-wrapped Mn(Ca)S and the precipitation of MnS inclusions in the steel.…”

Section: Mechanism Of Inclusion Evolution For Different Aluminum Conc...mentioning

confidence: 99%

Effect of Al on the Cleanliness of the x% Al–7CrSiMnMoV Steel Produced by Scrap Steel

Long,

Zeng,

Gao

et al. 2024

steel research int.

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It is crucial for recycling scrap steel to effectively remove impurities such as sulfur and oxygen, which directly determine the characteristics of inclusions in steel liquid. This study attempts to investigate the effect of Al concentration on the cleanliness of x% Al–7CrSiMnMoV steel by directly smelting scrap steel. Impurities such as sulfur and oxygen, as well as alloying elements in steel, are investigated. Also, the evolution characteristics of inclusion in the x% Al–7CrSiMnMoV steel are evaluated. The results show that the oxygen concentration in steel liquid gradually decreases; however, the sulfur concentration in steel liquid first increases and then decreases as the aluminum concentration increases from 0.026% to 0.58%. A high‐cleanliness 0.58% Al–7CrSiMnMoV steel with sulfur and oxygen concentrations of 0.0015% and 0.0018%, respectively, can be obtained. Additionally, the high Al–Ca–Mg–O and high Ca–Al–Mg–O contain S composite inclusions, and a small amount of fine Mn(Ca)S inclusions first form the high‐Al–Ca–Mg–O composite inclusions with an aluminum concentration of 0.026%, then form the high‐Al–Mg–O, Al–Mg–O‐wrapped Mn(Ca)S, and a large number of fine MnS inclusions with an aluminum concentration of 0.11%; eventually, it forms Al–Mg–O‐wrapped CaS as the Al concentrations continuously increase.

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Formation and Evolution of Non-Metallic Inclusions during Deoxidation by Al Addition in BOF Crude Steel

Cited by 13 publications

References 30 publications

Formation and Evolution of Non-metallic Inclusions in Medium Mn Steel during Secondary Refining Process

Formation and Evolution of Non-metallic Inclusions in Medium Mn Steel during Secondary Refining Process

Formation, Evolution and Removal of MgO·Al<sub>2</sub>O<sub>3</sub> Spinel Inclusions in Steel

Effect of Al on the Cleanliness of the x% Al–7CrSiMnMoV Steel Produced by Scrap Steel

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