Ferroalloy quality and steel cleanliness

Pande, Manish; Guo, Muxing; Guo, Xiaoling; Geysen, Daneel; Devisscher, S.; Blanpain, Bart; Wollants, Patrick

doi:10.1179/030192310x12700328925787

Cited by 38 publications

(59 citation statements)

References 14 publications

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“…These FeTi grades differ not only in their Ti contents but also in the nature of impurities present owing to their different processing routes. 1) However, it was shown with previous studies [2][3][4][5] that the introduction of titanium to the Al killed liquid steel results in the formation of Al-Ti-O inclusions. The formation of Al-Ti-O inclusions takes place immediately after the titanium source addition which with time reverts back to pure alumina inclusions accompanied by a change in morphology.…”

Section: Introductionmentioning

confidence: 93%

“…Therefore, the resultant product contains Ti, Al, alumina and unreduced Ti-O x inclusions. The total oxygen content of FeTi35 as measured with the LECO combustion technique was found to be very high (4 000 ppm to 1 wt%) 1) and can be largely attributed to the presence of alumina inclusions. The alumina inclusion size distribution is shown in Fig.…”

Section: Fe-feti35 Reaction Couplementioning

confidence: 99%

“…It was observed that irrespective of the addition time of Al or Ti, the final chemistry of the inclusions was alumina. In our previous study, 1) the investigation suggests that Al in FeTi70 is mostly present in its soluble form while that in FeTi35 is only partly soluble. The Al in FeTi35 was seen in the form of alumina and in the elemental form surrounding the unreduced titanium oxide.…”

Section: Introductionmentioning

confidence: 99%

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Inclusion Formation and Interfacial Reactions between FeTi Alloys and Liquid Steel at an Early Stage

2013

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Titanium is usually added to the liquid steel in the form of ferroalloys with varying Ti concentrations. These titanium sources also contain Al, Ca and O as the main impurities. In the present work, three different titanium sources, namely, pure Ti and two commercially produced Ti alloys i.e. FeTi70 and FeTi35 are studied. The Ti or FeTi was brought in contact with the liquid iron using the suction method, for a predetermined time and quenched. The reaction zone between the liquid Fe and the titanium source was subjected to microstructural investigation. The high Ti concentration region obtained in a pure Ti-Fe reaction couple, the inclusion formation in liquid iron after coming in contact with FeTi70 and the evolution of existing inclusions in FeTi35 after coming in contact with liquid iron have been studied. The present study has helped in understanding the influence of impurities from the Ti source on the dissolution behavior and the inclusion formation. On the basis of this study, it can be concluded that the Ti rich regions formed after the introduction of pure Ti could modify the existing alumina inclusions in liquid steel, the impurities in FeTi70 contribute to the inclusion formation depending upon the availability of O while FeTi35 introduces inclusions to the liquid steel.

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Section: Introductionmentioning

confidence: 93%

Section: Fe-feti35 Reaction Couplementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Inclusion Formation and Interfacial Reactions between FeTi Alloys and Liquid Steel at an Early Stage

2013

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“…However, the addition of ferroalloys may cause a supply of deleterious impurities to the liquid steel. In some cases, these impurities are clearly related to the raw material and the way of producing a ferroalloy and are more or less unavoidable . As the requirements on material properties increase, the effect of impurities in ferroalloys on the steelmaking process has been studied more deeply.…”

Section: Introductionmentioning

confidence: 99%

Three‐Dimensional Investigations of Inclusions in Ferroalloys

Karasev

Jönsson

2013

steel research int.

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As the requirements on material properties increase, there has been a demand on an additional knowledge on the effect of impurities in the ferroalloys on the properties. Thus, the number, morphology, size, and composition of inclusions in four different ferroalloys (FeTi, FeNb, FeSi, and SiMn) were investigated. This was done in three dimensions (3D) by using scanning electron microscopy in combination with energy dispersive spectroscopy after electrolytic extraction of the ferroalloy samples. The non‐metallic and metallic inclusions were successfully analyzed on the surface of film filter. Thereafter, the particle size distribution was plotted for most of the non‐metallic inclusions. The non‐metallic inclusions were found to be REM oxides in FeTi, FeSi, and SiMn, Al2O3, Ti–Nb–S–O oxides in FeNb and silicon oxides in SiMn. Moreover, the intermetallic inclusions were found to be a Ti–Fe phase in FeTi, Ca–Si, and Fe–Si–Ti phases in FeSi and a Mn–Si phase in SiMn. In addition, the almost pure single metallic phases were found to be Ti in FeTi, Nb in FeNb, and Si in FeSi.

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“…19 The microstructure of the alloys was examined using SEM-EDX. 19 The microstructure of the alloys was examined using SEM-EDX.…”

Section: Ferrous Metals and Alloysmentioning

confidence: 99%

Atomic spectrometry update. Industrial analysis: metals, chemicals and advanced materials

Carter

Fisher

Goodall

et al. 2011

J. Anal. At. Spectrom.

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Metals 1.1 Ferrous metals and alloys 1.2 Non-ferrous metals and alloys 2 Chemicals 2.1 Petroleum and petroleum products 2.1.1 Petroleum products -gasoline, diesels, gasohol, exhaust particulates 2.1.2 Fuel -coal, fly ash, particulates/emissions 2.1.3 Oils -crude oil, lubricants 2.1.4 Alternative fuels 2.2 Organic chemicals and solvents 2.2.1 The analysis of archaeological and art objects 2.2.2 LIBS and other laser techniques 2.2.3 Mass spectrometric techniques 2.2.4 Ion beam techniques 2.2.5 Speciation 2.2.6 Extraction, preconcentration and sample introduction 2.3 Inorganic chemicals and acids 2.3.1 Reviews, overviews and CRMs 2.3.2 Cements, concretes and plasters 2.3.3 Matrix modifiers 2.3.4 Forensic applications 2.3.5 Other applications 2.3.6 The analysis of nano-structures 2.3.6.1 Reviews and CRMs 2.3.6.2 Methods of analysis 2.4 Nuclear materials 2.4.1 Reviews and overviews 2.4.2 Nuclear forensic and safeguards applications 2.4.3 Other nuclear applications 3 Advanced materials 3.1 Polymeric materials and composites

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Ferroalloy quality and steel cleanliness

Cited by 38 publications

References 14 publications

Inclusion Formation and Interfacial Reactions between FeTi Alloys and Liquid Steel at an Early Stage

Inclusion Formation and Interfacial Reactions between FeTi Alloys and Liquid Steel at an Early Stage

Three‐Dimensional Investigations of Inclusions in Ferroalloys

Atomic spectrometry update. Industrial analysis: metals, chemicals and advanced materials

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