Evaluating the hot metal dephosphorization efficiency of different synthetic slags using phosphorus partition ratio, phosphate capacity and computational thermodynamics

Broseghini, Felipe Costa; Oliveria, Heitor Cristo Clem de; Soares, Silas Gambarine; Grillo, Felipe Fardin; Oliveira, José Roberto de

doi:10.1590/0370-44672016710072

Cited by 5 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Grillo et al (2013) also state that computational thermodynamics is a tool that allows the determination of these parameters, and also the prediction of which mixture will be more efficient in industrial processes. In the last years, some researchers developed models for predicting desulfurization efficiency using these parameters in desulfurization and dephosphorization mixtures for hot metal and steel (Broseghini et al, 2018;Pezzin et al, 2020;Silva et al, 2020).…”

Section: Metalurgia E Materiaismentioning

confidence: 99%

Development of a new parameter for predicting hot metal desulfurization efficiency

et al. 2021

Self Cite

View full text Add to dashboard Cite

Over the last decades, the capability of a desulfurizing mixture to remove sulfur has been widely studied. The hot metal desulfurization efficiency represents the percentage of sulfur removed from the bath and the development of parameters that predict the process efficiency is fundamental for selecting the best desulfurization mixture without the need for experimental tests. Therefore, this research aims to develop a new parameter to predict the hot metal desulfurization mixture efficiency, which was called the desulfurization factor (F DeS ). Desulfurizing mixtures from CaO-Fluorspar and CaO-Sodalite systems were used for this purpose. The phases present in the heating of the mixtures at 1400°C as well as the liquid and solid percentage were determined by ThelmoCalc software. These data were used in the desulfurization factor construction. Experiments were carried out in an electric resistance furnace with mechanical stirring. Different mixtures from these systems were added in molten hot metal at 1400°C. Sampling was made to measure the sulfur content variation with time. It was possible to apply the desulfurization factor to the proposed mixtures and to determine the influence of the solid and liquid phases on the desulfurization efficiency.

show abstract

Section: Metalurgia E Materiaismentioning

confidence: 99%

Development of a new parameter for predicting hot metal desulfurization efficiency

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Based on the slag properties and in equation 4, was presented a new parameter, called Dephosphorization Factor (FDeP), according to equation 5, which measures the efficiency of slag in dephosphorization [11,12]:…”

Section: Introductionmentioning

confidence: 99%

Influência Das Propriedades Da Escória Para Desfosforação Do Aço Em Fea

Moreira

2023

ABM Proceedings

View full text Add to dashboard Cite

Knowing the mechanisms that involve the removal of phosphorus from the steel to the slag is very important for the EAF process to be productive and efficient. There are many studies in the specialized literature on dephosphorization with expressions involving chemical composition and temperature. These expressions, deduced from equilibrium data, generally do not correlate well with industrial data. The present paper aims to study, using industrial data, the chemical and physical properties of an EAF slag in order to develop new ways to evaluate dephosphorization process and its efficiency regarding these properties. Different compositions of industrial heat slags, mainly with different CaO and FeO contents were selected to be analyzed. The mentioned slag properties and phases were determined by computational thermodynamics using the software FactSage 8.0 and the results of these analyzes was related to the dephosphorization efficiency. Based on these simulations, the parameter Dephosphorization Factor [FDeP = aCaO + aFeO + (Nliquid -Nsolid) -2*Viscosity] was used to measure the slags efficiency in EAF dephosphorization. It was found that this parameter presents a high correlation, for industrial scale, with the dephosphorization efficiency and can be used to predict which slag will be the most efficient. The temperature, in the analyzed range, does not seem to be a directly relevant factor in the efficiency of dephosphorization. On the other hand, the viscosity of the slag showed significant weight in the calculation of the efficiency using the parameter (FDep).

show abstract

“…Phosphorous is primarily introduced to the integrated steelmaking process through blast furnace additions, such as iron ore, coke, sinter, and fluxes [1][2][3]. Therefore, raw material selection is crucial in maintaining the desired phosphorous level in the final product [4].…”

Section: Introductionmentioning

confidence: 99%

Estimation of phosphorus distribution ratio at the end of blowing in BOF

Slović¹,

Bradarić²,

Raić³

et al. 2021

Metall Mater Eng

View full text Add to dashboard Cite

In integrated steel plants, the removal of phosphorous normally takes place during the primary basic oxygen furnace (BOF) steelmaking process. Phosphorous is usually introduced to the integrated steelmaking process through blast furnace additions, such as iron ore, coke, sinter, and fluxes. Among the others parameters such as optimizing the charging system, oxygen supply system, oxygen lance parameters of the converter, the flux quality in combination with temperature process control can improve the BOF efficiency of Dephosphorization. Phosphorus partition ratio (LP) is usually used to evaluate the thermodynamic efficiency of the dephosphorization of slags with different compositions in steelmaking processes. However, this parameter is only useful in equilibrium conditions, and it is not accurate when used to evaluate slag efficiency in industrial processes. Because of this, the aim of this work was to study the phosphorus partition ratio estimated from the experimental results in real plant conditions of two different BOF steel plants and compare them with well-known published models. In the present study, data from two steel plants (further Plant A and Plant B) were evaluated applying Healy’s, Suito and Inoui’s, Zhang’s as well as Assis’s equations. The calculated values were compared against measured values.

show abstract

Evaluating the hot metal dephosphorization efficiency of different synthetic slags using phosphorus partition ratio, phosphate capacity and computational thermodynamics

Cited by 5 publications

References 6 publications

Development of a new parameter for predicting hot metal desulfurization efficiency

Development of a new parameter for predicting hot metal desulfurization efficiency

Influência Das Propriedades Da Escória Para Desfosforação Do Aço Em Fea

Estimation of phosphorus distribution ratio at the end of blowing in BOF

Contact Info

Product

Resources

About