Analytical and numerical determination of the heat transfer coefficient between scrap and hot metal based on small-scale experiments

Penz, Florian Markus; Tavares, Roberto Parreiras; Weiß, Christian; Schenk, Johannes; Ammer, Rainer; Pastucha, Krzysztof; Klösch, Gerald

doi:10.1016/j.ijheatmasstransfer.2019.04.085

Cited by 16 publications

(13 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They derived an analytical model for the process and compared the numerical solution with experimental results. Comparable to other authors, for example Penz et al, they found that in preheated cylindrical specimens with a diameter of 0.013 m, the shell freezing and melting ends after a short period of less than 10 s. After this time range, a thermal equilibrium is derived and the dissolution of the solid continues under isothermal conditions . Kim and Pehlke developed their model based on the explicit method of computing the temperature distribution and location of the solid interface.…”

Section: Modeling Of the Scrap Melting And Dissolution Processmentioning

confidence: 98%

“…Penz et al describe an analytical and numerical heat transfer model in ref. . With the help of experimental measurements, the heat transfer coefficient was fitted to the models.…”

Section: Heat Transfermentioning

confidence: 99%

“…, will result in an approximately 10 times higher heat transfer coefficients. will result in an approximately 10 times higher heat transfer coefficients …”

Section: Heat Transfermentioning

confidence: 99%

“…An overview to the phenomenological understanding as well as theoretical considerations will lead into the research topic in the first two chapters. Further, this review classifies the past research work into the following categories: Single mass transfer experiments Heat transfer experiments Simultaneous heat and mass transfer in small‐scale experiments Simultaneous heat and mass transfer in converter experiments Modeling of scrap melting …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Review of Steel Scrap Melting in Molten Iron‐Carbon Melts

Penz¹,

Schenk

2019

steel research int.

Self Cite

View full text Add to dashboard Cite

In the current economic climate, the recycling of steel scrap is become one of the most interesting tasks for the optimization of integrated steel plants. Steelmaking aspects such as jet/bath interaction, slag formation or foaming, lime dissolution as well as slag/metal reactions have received more attention in recent years than the melting and dissolution phenomena of steel scrap in molten steel baths. Since the dynamic modeling of steelmaking processesespecially the Linz Donawitz oxygen steelmaking process (LD) -is becoming more important, interest in the melting and dissolution behaviour is increasing. Several researchers have investigated the complex transactions of coupled heat and mass transfer in the past. Small-scale experiments are carried out under conditions where only mass transfer or heat transfer were considered. A few authors have reported on pilot-scale investigations or commercial converters. The coupled heat and mass transfer has also been analyzed by several authors in mathematical models and numerical simulations. The present paper reviews the research on steel scrap melting and dissolution done in the last 50 years. A summary of all reported heat and mass transfer coefficients will be given and the differences between natural and forced convection will be explained. In addition, an overview of recently published numerical simulation describing the problem will give an outlook for future work.

show abstract

Section: Modeling Of the Scrap Melting And Dissolution Processmentioning

confidence: 98%

“…Penz et al describe an analytical and numerical heat transfer model in ref. . With the help of experimental measurements, the heat transfer coefficient was fitted to the models.…”

Section: Heat Transfermentioning

confidence: 99%

“…, will result in an approximately 10 times higher heat transfer coefficients. will result in an approximately 10 times higher heat transfer coefficients …”

Section: Heat Transfermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Review of Steel Scrap Melting in Molten Iron‐Carbon Melts

Penz¹,

Schenk

2019

steel research int.

Self Cite

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][12][13][14] In addition, the mass and heat transfer coefficients between the liquid steel and the steel bar under different experimental conditions were also analyzed. [15][16][17][18][19] Mathematical model and numerical simulation, as inexpensive and computationally efficient research methods, were widely used to study the melting of steel bar in liquid steel. [20][21][22][23][24][25][26][27][28][29] All these simulation methods can intuitively reflect the change of melting morphology of steel bar with time.…”

Section: Melting Characteristics Of Multipiece Steel Scrap In Liquid mentioning

confidence: 99%

Melting Characteristics of Multipiece Steel Scrap in Liquid Steel

Chen

Yang

et al. 2021

ISIJ Int.

View full text Add to dashboard Cite

Based on the analysis of single-bar melting experiments in a previous article, 1) the effect of spacing between the steel bars on the agglomeration of steel shells around the steel bars and the melting rate of steel scrap samples was studied in this article. In addition, a calculation model of melting time of steel scrap in the electric arc furnace under different bulk densities and random stacking conditions was also established. The two-bar melting experimental results show that the thermal simulation results are basically consistent with the numerical simulation results. And an increase in the spacing between the steel bars up to 6 mm and the preheating temperature of the steel scrap samples up to 1 073 K, can greatly reduce or eliminate the adverse effect of the agglomeration of steel shells around the steel bars on the melting process, thus greatly reducing the melting time. The multibar melting experimental results show that an increase in the porosity is beneficial to the melting of steel scrap samples, and when the porosity reached 0.84 and above, the melting time of multibar samples is close to that of an individual steel bar. In addition, the calculation model can accurately predict the melting time of the steel scrap in the electric arc furnace.

show abstract

Numerical Simulation of Heat Transfer Behavior in Hot Spot Zone of Converter Molten Bath

Jiang,

Sun,

Mao

et al. 2024

steel research int.

View full text Add to dashboard Cite

The multiphase fluid flow and heat transfer behavior in the steelmaking converter are essential for efficient and stable smelting. Herein, a mathematical model of heat transfer for the hot spot zone of the converter is established. The temperature distribution of the molten bath is clarified, and the effects of operating parameters and the exothermic rate of hot spot zone on the heat transfer behavior of the molten bath are investigated. The results show that the temperature gradient between the hot spot zone and the liquid steel as well as the circulation of liquid steel will lead to the nonuniform distribution of temperature. Both the direction of flow field and the mixing characteristics of molten bath influence the heating rate of molten bath, whereas the direction of the flow field plays a dominant role. In addition, the oxygen lance height has a significant influence on the heat transfer behavior; as the lance height increases from 1.35 to 1.65 m, the heating rate increases by 68.32%. The increase of exothermic rate will remarkably increase the temperature gradient and the heating rate increases by 65.84% and 114.28% when the exothermic rate increases by 1.5 and 2 times, respectively.

show abstract

Analytical and numerical determination of the heat transfer coefficient between scrap and hot metal based on small-scale experiments

Cited by 16 publications

References 15 publications

A Review of Steel Scrap Melting in Molten Iron‐Carbon Melts

A Review of Steel Scrap Melting in Molten Iron‐Carbon Melts

Melting Characteristics of Multipiece Steel Scrap in Liquid Steel

Numerical Simulation of Heat Transfer Behavior in Hot Spot Zone of Converter Molten Bath

Contact Info

Product

Resources

About