Static Model for Converter Steelmaking by Using Limestone

Zhang, Wei; Wang, Xiaoming; Sun, Guangqi; He, Yi; Zou, Zongshu; Yu, Aibing

doi:10.1007/978-3-319-48764-9_111

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…The unreacted core model have been widely used in metallurgical industry, and mass transfer driven by concentration gradient has been used to describe the model [17]. Using limestone instead of lime as slagging flux is a new technology in converter steelmaking process [18][19][20][21]. But with the increase of temperature, especially limestone is used to add into the converter as slagging agent, and the temperature of early converter steelmaking is above 1250°C, which is much higher than the critical temperature of limestone decomposition, limestone decomposition pressure can reach about 40 atmospheres, leading to that the diffusion of CO 2 gas driven by concentration gradient may not be the main factor for the mass transfer of CO 2 outwards.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of limestone decomposition in hot metal

Xiang

Wang

Zhang

et al. 2018

Metall. Res. Technol.

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Compared with the traditional limestone calcination, this paper focuses on the conditions and temperature in hot metal where limestone calcines in converter steelmaking process. Considering heat transfer, mass transfer driven by concentration gradient and mass transfer (CO2 gas flow) driven by pressure gradient, macro kinetic models are established to describe limestone decomposition rate respectively. The method of rotating cylinder sample is used in the experiment of limestone decomposition in hot metal. The image processing software Image-Pro Plus is used to analyze the cross section of limestone calcined to get the unreacted core radius of cross section of cylindrical limestone. The results show that the decomposition mechanism of limestone follows the unreacted shrinking core model, the heat conduction of lime layer is the controlling step, the heat conduction and CO2 migration through the product layer determine the rate of limestone decomposition, and the corresponding kinetic equations are established.

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Section: Introductionmentioning

confidence: 99%

Kinetics of limestone decomposition in hot metal

Xiang

Wang

Zhang

et al. 2018

Metall. Res. Technol.

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“…The foamed slag contains not only small gas bubbles but also many steel droplets of different sizes. Steel droplets in the emulsified slag have been a topic of many researchers . The two foremost important reactions in the converter process are decarburization and dephosphorization.…”

Section: Introductionmentioning

confidence: 99%

Study on Apparent Viscosity of Foam and Droplet Movement Using a Cold Model

Martinsson

Sichen

2015

steel research int.

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The apparent viscosities of foams generated by passing argon through silicone oil are measured. The foams are found to be non-Newtonian flows having apparent viscosities 4-5 times higher than the dynamic viscosity of the origin fluid. The movements of different particles and droplets and their residence times are studied. The measured average velocities of the particles/droplets are substantially lower than the values estimated based on the dynamic viscosities. For both mechanical and gas stirrings, the flows of the foam are very different from pure liquid. The movement of the bar and stirring gas bubbles only pushes a limited number of bubbles which are very close to them to move. No bulk flow as in pure liquid is generated by the stirring.

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Static Model for Converter Steelmaking by Using Limestone

Cited by 2 publications

References 3 publications

Kinetics of limestone decomposition in hot metal

Kinetics of limestone decomposition in hot metal

Study on Apparent Viscosity of Foam and Droplet Movement Using a Cold Model

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