EOF cold model-study of bath behavior

Maia, Breno Totti; Imagawa, Rafael Kajimoto; Abreu, Gustavo; Petrucelli, Ana Clara; Tavares, Roberto Parreiras

doi:10.1016/j.jmrt.2015.10.001

Cited by 2 publications

(6 citation statements)

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“…Additionally, the EOF has an option to utilize the off-gas-sensible heat, which is generated during the process by the three-stage scrap preheating setup. [1][2][3] To utilize the chemical energy from CO, additional injectors, called atmospheric injectors, were placed farther from the melt surface (i.e., 1.2 m) to provide additional heat to the scrap preheating setup. Later preheated air-fuel injection through burners was replaced with supersonic lancing with pure oxygen.…”

Section: Introductionmentioning

confidence: 99%

“…Further, the water-cooled panels were added above the bath refractory lining. [1,2] At present, in Brazil, an EOF is being operated with a single scrap preheating setup. However, in India, the whole scrap preheating setup has been removed from the furnace.…”

Section: Introductionmentioning

confidence: 99%

“…In the late 1970s, when OHFs were getting replaced by the BOFs and EAFs, KORF initiated modifications in OHFs and called it as energy‐optimizing furnace (EOF). [ 1,2 ] The shape of the EOF was similar to the EAF allowing the furnace to do continuous slag flushing during the blowing and slag‐free tapping. Knowing the advantages of combined blowing of oxygen from the bottom and top of the furnace in the BOFs, oxygen injection from the bottom and air and fuel injection from the top of the EOF were introduced.…”

Section: Introductionmentioning

confidence: 99%

“…As per the former design, the main function of the atmospheric injectors was post‐combustion. [ 1,2 ] Vidhyasagar et al [ 5 ] reported that due to the modifications in the original designs, atmospheric injectors also contribute to the solute removal, however, it was not quantified due to the lack of required process control tools. The entrainment of air from the furnace atmosphere is also reported.…”

Section: Introductionmentioning

confidence: 99%

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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: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Static Model for Energy‐Optimizing Furnace

Vidhyasagar

Kumar

Viswanathan

et al. 2022

steel research int.

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“…The oxygen from the supersonic lances penetrates the slag and oxidizes the solutes in the hot metal. There are four atmospheric injectors on the side walls, which are reported to oxidize the CO gas coming out of the liquid metal bath to CO 2 gas [1][2][3]. An oxygen hand lance is used to remove slag sticking to refractories and for better mixing of slag.…”

Section: Introductionmentioning

confidence: 99%

Thermo-kinetics, mass and heat balance in an energy optimizing furnace for primary steel making

Vidhyasagar

Gundagani

Balachandran

2020

Ironmaking & Steelmaking

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Energy optimizing furnace (EOF) is a primary steel making reactor, where the autogenous exothermic reaction heat, associated with the solute oxidation is utilized for making the steel. The thermo-kinetic reactions of the steel making process have been evaluated in the world's largest, 65 ton EOF, at JSW Steel Ltd., Salem. The solute oxidation as a function of blow time and Si content was evaluated. The mass balance analysis showed that oxygen from the furnace atmosphere has to be entrained by the oxygen jet from the inclined supersonic lance, to completely oxidize the solutes in the melt. The heat balance showed that the power of 352 kWh per metric ton of hot metal is generated by the solute oxidation along with the post combustion. The characteristics of the inclined single hole-supersonic oxygen jet on the molten bath are brought out. Other operational aspects of the process are elaborated.

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EOF cold model-study of bath behavior

Cited by 2 publications

References 0 publications

A Static Model for Energy‐Optimizing Furnace

A Static Model for Energy‐Optimizing Furnace

Thermo-kinetics, mass and heat balance in an energy optimizing furnace for primary steel making

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