The structure of foaming BOF-converter slag

Martinsson, Johan; Glaser, Björn; Sichen, Du

doi:10.1080/03019233.2017.1410950

Cited by 11 publications

(8 citation statements)

References 25 publications

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“…The different slag compositions led to different viscosities. [132] An induction furnace was used, in which a graphite crucible filled with a CaO-SiO 2 -MgO-FeO slag and 7 g of pig iron containing 3.9 wt% C was heated. The slag and iron were melted already after %4 min, at which point the foaming started by the reduction of FeO.…”

Section: Structure Of Foaming Slagmentioning

confidence: 99%

“…A slag containing about 10% of second phase is hardly to be Newtonian. Several computational models from the last decades have resulted in movies and figures of foaming slag behavior or slag flow in LD converters where the [132] Copyright 2017, Taylor & Francis Ltd. [177] www.advancedsciencenews.com l www.steel-research.de steel research int. 2022, 93, 2100132 slag is in the form of foam in most time period of the process.…”

Section: Behavior Of Foaming Slagmentioning

confidence: 99%

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The Laboratory Study of Metallurgical Slags and the Reality

Sichen

Huss

Vickerfält

et al. 2021

steel research int.

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The development of new materials and their production processes along with the environmental constraints demand new data of high quality, especially thermodynamic and physical property data. As slags play a crucial role in metallurgical processes and recycling, the need of better understanding of the reaction mechanisms between slag and metal is also increasingly felt. High precision data and better understanding of the reaction mechanism require efficient collaboration between the researchers in the laboratory and in the industries. Unfortunately, in some cases, the reported data are not obtained in well-controlled experimental conditions. Without the knowledge of the experimental conditions, the use of the data in industrial practice would possibly lead to unintended results. In other cases, the measurements themselves, even their principles, are questionable. This review article addresses how to make the laboratory investigation more relevant to the industrial reality. Some existing uncertainties in the laboratory studies are also discussed. To help a sensible discussion, some specially designed experiments are conducted to support the argument. The review is focused on slag properties (namely, sulfide capacity, phosphate capacity, apparent viscosity, and apparent interfacial tension) and studies of interfacial slag phenomena.

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Section: Structure Of Foaming Slagmentioning

confidence: 99%

Section: Behavior Of Foaming Slagmentioning

confidence: 99%

The Laboratory Study of Metallurgical Slags and the Reality

Sichen

Huss

Vickerfält

et al. 2021

steel research int.

Self Cite

View full text Add to dashboard Cite

show abstract

“…(8). 43) Based on the maximum gas fraction of the foam stacked by the spherical bubbles of 0.74, the foaming height of the foam stacked by the spherical bubbles (Partial Foaming I) should be no more than 2.86 times of the initial liquid height. where φ ( ) t is the average gas fraction at time t, V g (t), and V l (t) are the volume of the gas and liquid at time t, respectively (m 3 ), and h(t) and Δh(t) are the liquid height and the foaming height at time t, respectively (m).…”

Section: Effects Of Viscosity On Characteristic Parameters Of the Dynamic Evolution Of Slag Foamingmentioning

confidence: 99%

Effect of Viscosity on Dynamic Evolution of Metallurgy Slag Foaming

Zhang

Wang

et al. 2021

ISIJ Int.

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“…During the decarburization process, a large quantity of carbon monoxide (CO) gas released from the slag-metal reaction (Equation ( 1)) would inevitably induce the slag foaming in a BOF. Foamed slag occurs most of the time, [3] which is important in BOF steelmaking.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the high-temperature, dynamics, [6,7] multiphase, [8] and multifactor characteristics, [9][10][11] slag foaming cannot be observed in the process of metallurgical smelting. [3] In recent years, physical modeling has developed into the most popular method to investigate metallurgical slag foaming.…”

Section: Introductionmentioning

confidence: 99%

Study on Splashing Mechanism in Basic Oxygen Furnace Based on Slag Foaming Modeling

Wang

Zhang

et al. 2021

steel research int.

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Inappropriate slag foaming is the main cause of splashing in basic oxygen furnace (BOF). Through the physical modeling, the effects of slag–metal reaction rate, viscosity of slag, slag–metal interface tension, and lance height on the slag foaming are investigated, and further analyzed the relation between the extent of BOF slag foaming and splashing. Consequently, two patterns of overflowing splashing and eruptive splashing and their critical conditions are summarized. The experimental results indicate that gas released by slag–metal reaction is primarily responsible for slag foaming in BOF, and the maximum height of foamed slag increases with increasing reaction rate of slag–metal. Moreover, an increase in dynamic viscosity of slag prevents the foam structure transforming from spherical foam to polyhedral foam, and thus improves the maximum foaming ability of slag and the stability of foam structure. With decreasing slag–metal interface tension, the slag–metal emulsification and the stability of foam structure are promoted. Finally, it is concluded that overflowing splashing occurs under the conditions of the higher dynamic viscosity of slag and the larger gas generation amount; whereas, eruptive splashing occurs under the conditions of the lower dynamic viscosity of slag and the higher gas generation rate.

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The structure of foaming BOF-converter slag

Cited by 11 publications

References 25 publications

The Laboratory Study of Metallurgical Slags and the Reality

The Laboratory Study of Metallurgical Slags and the Reality

Effect of Viscosity on Dynamic Evolution of Metallurgy Slag Foaming

Study on Splashing Mechanism in Basic Oxygen Furnace Based on Slag Foaming Modeling

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