Viscosity of Highly Basic Slags

Seok, Seong Ho; Jung, Seung Boo; Lee, Young Seok; Min, Dong Joon

doi:10.2355/isijinternational.47.1090

Cited by 114 publications

(93 citation statements)

References 19 publications

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“…Buhre et al [93] emphasize that their results are not valid for the cases in which the molten ash contains solids and, thus, behave as a non-Newtonian fluid. As Seok et al [94] observed, the highly basic BOF slags exhibit much higher viscosities than those measured for normal slags. They suggested using the Einstein-Roscoe equation for the liquid melt containing solid particles:…”

Section: A Brief Review Of Various Viscosity Modelsmentioning

confidence: 62%

Slag Behavior in Gasifiers. Part II: Constitutive Modeling of Slag

Massoudi

Wang

2013

Energies

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Abstract:The viscosity of slag and the thermal conductivity of ash deposits are among two of the most important constitutive parameters that need to be studied. The accurate formulation or representations of the (transport) properties of coal present a special challenge of modeling efforts in computational fluid dynamics applications. Studies have indicated that slag viscosity must be within a certain range of temperatures for tapping and the membrane wall to be accessible, for example, between 1,300 °C and 1,500 °C, the viscosity is approximately 25 Pa·s. As the operating temperature decreases, the slag cools and solid crystals begin to form. Since slag behaves as a non-linear fluid, we discuss the constitutive modeling of slag and the important parameters that must be studied. We propose a new constitutive model, where the stress tensor not only has a yield stress part, but it also has a viscous part with a shear rate dependency of the viscosity, along with temperature and concentration dependency, while allowing for the possibility of the normal stress effects. In Part I, we reviewed, identify and discuss the key coal ash properties and the operating conditions impacting slag behavior.

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Section: A Brief Review Of Various Viscosity Modelsmentioning

confidence: 62%

Slag Behavior in Gasifiers. Part II: Constitutive Modeling of Slag

Massoudi

Wang

2013

Energies

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“…where: The description of non-Newtonian fluids in the form of equations (7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26) has the advantage of determining their apparent viscosity, which significantly simplifies algorithmic procedures in numerical programming. This mathematical notation has also disadvantages such as the necessity to determine limiting apparent viscosities, which is not always technically and technologically feasible [8].…”

Section: Rheological Modelsmentioning

confidence: 99%

“…The dependence of viscosity on temperature may be determined with the equation by H. Weymann and J. Frenkel [10]: By analysing the temperature dependence of metals viscosity on the basis of the J. G. Kirkwood's structural liquid model, Chapman has indicated the following relationship [11]:…”

Section: Non-rheological Modelsmentioning

confidence: 99%

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Mathematical Models For Calculating The Value Of Dynamic Viscosity Of A Liquid

Ślęzak

2015

Archives of Metallurgy and Materials

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The objective of this article is to review models for calculating the value of liquid dynamic viscosity. Issues of viscosity and rheological properties of liquid ferrous solutions are important from the perspective of modelling, along with the control of actual production processes related to the manufacturing of metals, including iron and steel. Conducted analysis within literature indicates that there are many theoretical considerations concerning the effect of viscosity of liquid metals solutions. The vast majority of models constitute a group of theoretical or semi-empirical equations, where thermodynamic parameters of solutions, or some parameters determined by experimental methods, are used for calculations of the dynamic viscosity coefficient.This article presents equations belonging to four groups of models for calculating the value of the dynamic viscosity coefficient: rheological models, non-rheological models, non-rheological and rheological models for calculating viscosity of metals. The last group of equations is developed by own experiments -high temperature rheological liquid steel measurements.Keywords: viscosity models, rheology, viscosity, viscosity of metals Celem prezentowanego artykułu jest dokonanie przeglądu modeli służących do obliczania wartości współczynnika lepkości dynamicznej cieczy. Zagadnienia lepkości oraz właściwości reologicznych ciekłych roztworów żelaza są ważne z punktu widzenia modelowania, a także sterowania rzeczywistymi procesami technologicznymi w odniesieniu do wytwarzania metali, w tym surówki i stali. Z przeprowadzonej analizy literaturowej wynika, że istnieje wiele teoretycznych rozważań nad zjawiskiem lepkości ciekłych roztworów metali. Zdecydowana większość modeli stanowi grupę równań teoretycznych, bądź półempirycz-nych, w których do obliczania wartości współczynnika lepkości dynamicznej wykorzystywane są wielkości termodynamiczne roztworów lub pewne wielkości wyznaczane metodami eksperymentalnymi.W artykule zaprezentowano równania należące do czterech grup modeli służących do obliczania wartości współczynnika lepkości dynamicznej: modele reologiczne, modele niereologiczne oraz modele niereologiczne oraz reologiczne wykorzystywane do obliczania lepkości metali. Ostatnia grupa równań została opracowana w ramach badań własnych -wysokotemperaturowych pomiarów reologicznych ciekłej stali.

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“…(32) e Young (112) , que estão dentro da faixa de composição e temperatura para essas escórias. (32) (Log Cs) Young (112) (Log Cs) Inoue e Suito (49) (Log Ls) Shankar (34) ( De acordo com Niedringhaus e Fruehan (53) , Ohya (107) e Seok et al (108) (53,55,108) , esses compostos prejudicam a dessulfuração, pois formam uma camada de fase sólida ao redor da partícula de CaO, limitando o transporte de massa do enxofre. Essa limitação da dessulfuração pela formação dos compostos na fase sólida já foi discutida na revisão bibliográfica, conforme exposto no capítulo 2.5.2.…”

Section: Análises Dos Resultados Experimentaisunclassified

Estudo da substituição da fluorita por alumina ou sodalita e de cal por resíduo de mármore em escórias sintéticas dessulfurantes.

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Viscosity of Highly Basic Slags

Cited by 114 publications

References 19 publications

Slag Behavior in Gasifiers. Part II: Constitutive Modeling of Slag

Slag Behavior in Gasifiers. Part II: Constitutive Modeling of Slag

Mathematical Models For Calculating The Value Of Dynamic Viscosity Of A Liquid

Estudo da substituição da fluorita por alumina ou sodalita e de cal por resíduo de mármore em escórias sintéticas dessulfurantes.

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