Interfacial Behaviour in Ferroalloys: The Influence of FeMn Slag Composition

Bublik, Sergey; Tangstad, Merete; Einarsrud, Kristian Etienne

doi:10.1007/s11663-022-02605-3

Cited by 4 publications

(4 citation statements)

References 23 publications

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“…In addition, because Marangoni flow is a function of viscosity, it is proposed that the emulsion of metal in slag decreases with increased viscosity. This was found for a similar metal-slag system [26]. For the present system, it can be qualitatively observed in the work of Solbakk [20] for less viscous CaO-SiO2 slag with a decreasing CaO/SiO2 ratio.…”

Section: Hydrodynamic Phenomenasupporting

confidence: 87%

“…Extensive research on the interaction between liquid high-Al steel and liquid CaO-SiO 2 -Al 2 O 3 slag has consistently demonstrated that the metallothermic reaction described by Equation ( 2) drives interfacial phenomena [20,[23][24][25][26][27][28]. Observations and explanations of these interfacial phenomena are well documented, encompassing various metal-slag systems, such as Fe-Mn in contact with CaO-SiO 2 -MnO [26] and Cu-Ni-Al alloy with Li 2 O-Al 2 O 3 -SiO 2 [29]. However, the relative significance of these phenomena in influencing overall reaction kinetics remains uncertain.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Liquid–Liquid Reaction Phenomena of Aluminum in Calcium Silicate Slag

Philipson,

Wallin,

Einarsrud

2024

Materials

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To achieve better process control of silicon (Si) alloy production using aluminum as a reductant of calcium silicate (CaO-SiO2) slag, it is necessary to understand the reaction phenomena concerning the behavior of formed phases at the metal-slag interface during conversion. The interfacial interaction behavior of non-agitated melt was investigated using the sessile drop method for varying time and temperature, followed by EPMA phase analysis at the vicinity of the metal–slag interface. The most remarkable features of the reaction were the accumulation of solid calcium aluminate product layers at the Al alloy–slag interface and spontaneous emulsion of Si-alloy droplets in the slag phase. The reduction is strictly limited at 1550 °C due to the slow transfer of calcium aluminates away from the metal-slag interface into the partially liquid bulk slag. Reduction was significantly improved at 1600–1650 °C despite an interfacial layer being present, where the conversion rate is most intense in the first minutes of the liquid–liquid contact. A high mass transfer rate across the interface was shown related to the apparent interfacial tension depression of the wetting droplet along with a significant perturbed interface and emulsion due to Kelvin–Helmholtz instability driven by built-up interfacial charge at the interface. The increased reaction rate observed from 1550 °C to 1600–1650 °C for the non-agitated melt was attributed to the advantageous physical properties of the slag phase, which can be further regulated by the stoichiometry of metal–slag interactions and the composition of the slag.

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Section: Hydrodynamic Phenomenasupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Investigation of Liquid–Liquid Reaction Phenomena of Aluminum in Calcium Silicate Slag

Philipson,

Wallin,

Einarsrud

2024

Materials

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“…Typically, slag is formed in many processes [99][100][101][102][103][104][105][106][107]; for example, ironmaking, convertor steelmaking, refining, continuous casting, the electroslag remelting process, and ferroalloys production. The thermodynamic properties and physicochemical properties of many types of slags have been widely evaluated and modeled [108][109][110][111][112][113][114].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Inclusion Removal Ability in Refining Slags Containing Ce2O3

Cao

Wang

et al. 2023

Crystals

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The elimination of inclusions in steelmaking processes has been widely studied. The removal of inclusions by slags containing the rare earth oxide Ce2O3 are studied using an integrated numerical model. The integrated model involves the inclusion motion model, interfacial tension calculation model, surface tension calculation model of slag, and the mass action concentration model, based on ion and molecule coexistence theory. The motion behaviors of both solid Al2O3 inclusions and 50%wtAl2O3–50%wtCaO liquid inclusions of varied sizes at CaO-Ce2O3-SiO2-Al2O3(-MgO) slag systems are evaluated. The results show that it is more difficult to remove the inclusions with smaller sizes and in slag with a higher viscosity. Liquid inclusions are more difficult to remove than solid inclusions. It is found that the CaO-Ce2O3-SiO2-Al2O3-MgO refining slag shows a better ability to remove Al2O3 inclusions than that of the CaO-SiO2-Al2O3-MgO slag. The reason for this is that the addition of the rare earth oxide Ce2O3 can decrease the viscosity of slags, as well as improving the wetting effects of slags on Al2O3 inclusions. For two slags systems, the CaO-Ce2O3-SiO2-Al2O3-MgO slag system shows a better ability to remove Al2O3 inclusions than the CaO-Ce2O3-SiO2-Al2O3 slag system. The addition of 5% to 8% Ce2O3 in a CaO-SiO2-Al2O3-MgO slag is an optimized case for industrial applications.

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“…Ген PRLR детерминирует рецептор гормона передней доли гипофиза -пролактина, который в организме млекопитающих участвует в регуляции роста, метаболизма и размножения [33]. Ген рецепторов проталактина (PRLR) -один из самых универсальных гормонов гипофиза, он является потенциальным генетическим маркером признаков молочной продуктивности в животноводстве.…”

Section: введение / Introductionunclassified

Analysis of polymorphic variants of MSTN, CAST, PRLR genes associations with economically useful qualities of vyatka breed horses

Belousova,

Bass,

Zinovieva

et al. 2023

jour

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The relationship of polymorphic variants of MSTN, CAST, PRLR genes with working qualities and body types of Vyatka horses was studied. The purpose of the research is to assess the genetic and breeding potential of the Vyatka breed horses, as well as to study the relationship between the MSTN, CAST, PRLR genotypes and the economically useful qualities of horses. The method of DNA extraction from Vyatka horse hair follicles using ExtraGene DNA Prep. was applied. When scanning the mutations in the loci MSTN (n=43), CAST (n=41) and PRLR (n=41), DNA amplification the method of allele-specific PCR was performed. The frequency of alleles and genotypes was calculated using MS Excel 10. As a result of research, the dependence of Vyatka horses working qualities on the frequency of occurrence of myostatin MSTN alleles (g.66493737 T>C) was noted. The horses with a higher occurrence of the MSTN/C allele have more productive movements than the individuals with the T/T genotype typical for aborigines. Vyatka horses with the T/T genotype are more versatile, and also show better results in sledding, while the horses with the T/C genotype are better under saddle. The horses with the T/T genotype have the highest bony index but the lowest massiveness index. The MSTN T/T (0.581) homozygous genotype for the "wild" allele predominates in Vyatka horses. A relation ship between body types and the calpastatin gene (CAST) has been revealed for the first time in horse breeding. The horses with the G/A genotype turned out to be the most massive and bony, the horses with the A/A genotype were lighter, the highest frequency of occurrence of the CAST G/A genotype (0.463) was noted, the CAST G/G genotype is rare in the breed (0.171). A relationship between the frequency of occurrence of prolactin receptor genes (PRLR) and body types of horses was not found. The frequency of occurrence of PRLR C/C (0.366) and PRLR G/C (0.390) genotypes is approximately identical, the PRLR G/G genotype is less common (0.244). The study of genes associated with economically useful qualities in all breeding stallions will enable to conduct more efficient breeding, using the desired genotypes, which is important for small breeds.

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Interfacial Behaviour in Ferroalloys: The Influence of FeMn Slag Composition

Cited by 4 publications

References 23 publications

Investigation of Liquid–Liquid Reaction Phenomena of Aluminum in Calcium Silicate Slag

Investigation of Liquid–Liquid Reaction Phenomena of Aluminum in Calcium Silicate Slag

Assessment of Inclusion Removal Ability in Refining Slags Containing Ce2O3

Analysis of polymorphic variants of MSTN, CAST, PRLR genes associations with economically useful qualities of vyatka breed horses

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