Phosphorus Partition Between Liquid Crude Steel and High‐Basicity Basic Oxygen Furnace Slags

Kovtun, Oleksandr; Karbayev, M.; Korobeinikov, Iurii; Srishilan, C.; Shukla, Ajay Kumar; Volkova, Olena

doi:10.1002/srin.202000607

Cited by 9 publications

(10 citation statements)

References 24 publications

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“…Urban et al [ 25 ] reported that in BOF, at 1680–1710 °C for the basicity of 3.4–3.6, the maximum L P level can be found at the total Fe content in the slag of 23–25% (i.e., 29.6‐32.1%FeO). From the laboratory experimental results reported by Kovtun et al, [ 29 ] at higher basicity ( V ) level of 3.9–4.2 with less than 5% Al 2 O 3, there will be a reversion of L P values after reaching the slag FeO of 30% and the optimum slag FeO level ranges from 25% to 30%.…”

Section: Resultsmentioning

confidence: 99%

A Static Model for Energy‐Optimizing Furnace

Vidhyasagar

Kumar

Viswanathan

et al. 2022

steel research int.

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In an integrated steel‐making plant, crude steel is produced mainly through a basic oxygen furnace (BOF) and an electric arc furnace (EAF). Apart from these two, energy‐optimizing furnace (EOF) is also evolving as a competent technology in the primary steel‐making process. Currently, a few plants are using the EOFs for crude steel production. The process control tools available in the EOFs are also limited, which may be the reason for limited reported attempts to improve this process. Mass and heat balance are essential methodologies to understand the mass flow of a process much better. Many mass and heat balance‐based studies have been carried out for the BOFs and EAFs, which can aid the operation of these furnaces toward process optimization. The present work focuses on developing a static model for the EOF process that can give a better understanding of the process and can aid the operation. A Microsoft Excel‐based model has been developed considering heat and mass balance coupled with thermodynamic data and operating conditions of the furnace from the plant scale experiments. The present model can predict the entire mass flow in the process and its accuracy is also assessed. The possible reasons for the present accuracy level were also elaborated.

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Section: Resultsmentioning

confidence: 99%

A Static Model for Energy‐Optimizing Furnace

Vidhyasagar

Kumar

Viswanathan

et al. 2022

steel research int.

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“…It is shown in Figure 2 and is presented in detail in a previous study. [11] Armco iron with 64 ppm of phosphorus is used for the equilibrium investigations of the phosphorus transfer from slag to steel, the chemical analysis of the Armco iron is shown in Table I. For the equilibrium investigations of the phosphorus transfer from steel to slag the Armco iron is alloyed with FeP25 (17.45 mass pct P, 0.618 mass pct Si, 0.508 mass pct Cr, 0.314 mass pct Al, 0.312 mass pct Ca, 0.055 mass pct Mn, 0.031 mass pct S) up to 790 ppm of phosphorus.…”

Section: Methodsmentioning

confidence: 99%

“…Several empirical correlations to predict the phosphorus partition or phosphorus capacity as function of temperature, chemical composition of the slags or optical basicity were proposed. [4][5][6][7][8][10][11][12][13][14][16][17][18][19][20][21][22][23][24][25][26] At the same time, unfortunately, very often these correlations work only for slags of the chemical composition for which they were determined. [11] Also, unfortunately, most studies from the past on the removal of phosphorus from crude steel were carried out with liquid slags of low basicity.…”

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confidence: 99%

“…[4][5][6][7][8][10][11][12][13][14][16][17][18][19][20][21][22][23][24][25][26] At the same time, unfortunately, very often these correlations work only for slags of the chemical composition for which they were determined. [11] Also, unfortunately, most studies from the past on the removal of phosphorus from crude steel were carried out with liquid slags of low basicity. Real industrial slags used in BOF are most often saturated or oversaturated with CaO, high basic and heterogeneous.…”

mentioning

confidence: 99%

“…Real industrial slags used in BOF are most often saturated or oversaturated with CaO, high basic and heterogeneous. Only a few studies have dealt with high basic slags in the past [8,11,21] The aim of the present work is to investigate the phosphorus partition between the crude steel and high basic BOF slag as a function of V 2 O 5 content. Thereby the industrial slag from one European integrated steel plant with the ratio CaO/SiO 2 = 4.2 is selected as the initial slag, into which pure V 2 O 5 in range up to 15 mass pct is mixed.…”

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confidence: 99%

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Phosphorus Partition Between Liquid Crude Steel and High-Basicity Basic Oxygen Furnace Slags Containing V2O5

Neubert

Kovtun

Kreschel

et al. 2023

Metall Mater Trans B

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The influence of V2O5 on the phosphorus partition between liquid crude steel and heterogenous basic oxygen furnace (BOF) slag with CaO/SiO2 = 4.2 was investigated at a temperature of 1600 °C in a middle frequency induction furnace. Thereby the phosphorus transfer from “steel to slag” as well as from “slag to steel” was studied over a holding time of 60 minutes. The measured results were shown as phosphorus partition and phosphorus capacity and compared with the experimental values from the literature. It was found that V2O5 in highly basic BOF slags decreases phosphorus partition and phosphorus capacity. In addition, the resulting slags were investigated using a scanning electron microscope (SEM).

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Sustainable Ironmaking Toward a Future Circular Steel Economy: Exploiting a Critical Oxygen Concentration for Metallurgical Cu Removal from Scrap‐Based Melts

Souza Filho,

da Silva,

Büyükuslu

et al. 2024

steel research int.

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A circular steel economy based on recycling scrap is severely hampered by the increasing accumulation of Cu returning from more and more electrified products, which severely limits processing, application, and safety of steels. As of yet, no viable strategies for its removal have been developed, and the increasing Cu contamination can only be diluted with fresh primary iron. This is not only evoking CO2 emissions from conventional reduction processes, but also merely delays the problem until global demands allow for a circular steel economy. However, the ongoing transformation toward green steel making may offer pathways to overcome this complex metallurgical challenge. It is demonstrated that Cu can be effectively evaporated from Fe–Cu–O melts—representing Fe ore mixed with Cu‐contaminated steel scrap—during hydrogen plasma‐based smelting reduction. This evaporation is found to be strongly influenced by the Cu activity determined by the concentration of oxygen in the liquid, with a critical O concentration of about 22 wt%. Even without the presence of hydrogen, Cu concentrations can thereby be drastically reduced from 1 to less than 0.1 wt%. Potentials and challenges for leveraging these fundamental findings on a laboratory scale for future industrial production of green steel are outlined and discussed.

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Phosphorus Partition Between Liquid Crude Steel and High‐Basicity Basic Oxygen Furnace Slags

Cited by 9 publications

References 24 publications

A Static Model for Energy‐Optimizing Furnace

A Static Model for Energy‐Optimizing Furnace

Phosphorus Partition Between Liquid Crude Steel and High-Basicity Basic Oxygen Furnace Slags Containing V2O5

Sustainable Ironmaking Toward a Future Circular Steel Economy: Exploiting a Critical Oxygen Concentration for Metallurgical Cu Removal from Scrap‐Based Melts

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