The Effect of Solid Particles on Liquid Viscosity

Wu, Liushun; Ek, Mattias; Song, Minho; Sichen, Du

doi:10.1002/srin.201000207

Cited by 61 publications

(44 citation statements)

References 27 publications

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“…(2) Even if Du et al stated that the Einstein-Roscoe equation can be used directly with no modification required, 9) but from Fig. 10, it can be seen that the calculated relative viscosities are much lower than the measured values.…”

Section: Discussionmentioning

confidence: 98%

“…By comparing the measured viscosities with the calculated viscosities by different models, Du et al concluded that Einstein-Roscoe equation was the only model applicably for the systems of Liquid-2CaO.SiO 2 mixtures and liquid-MgO mixtures at the steelmaking temperature, and no modification of the model parameter was found necessary, though the particles were not spherical. 9) However, both Wright et al 7) and Seok et al 8) found that the parameters of Einstein-Roscoe equation should be adjusted to describe the viscosity variation behavior of suspension system.…”

Section: Introductionmentioning

confidence: 99%

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Influence of TiC on the Viscosity of CaO–MgO–Al2O3–SiO2–TiC Suspension System

2015

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The present study investigated the influence of TiC particle addition on the viscosity of CaO-MgOAl2O3-SiO2 melts by using the rotating cylinder method. It was found viscosity increased as increasing the volume fraction of TiC, but decreased as enhancing the rotation speed. The temperature dependence of viscosity for the same composition can be described by the Arrhenius law. However, temperature has little influence on the relative viscosity of TiC bearing slag. There is also no obvious difference of activation energies for different compositions with or without the addition of TiC solid particle. Therefore, the activation energy of solid-liquid mixture may be mainly determined by the composition of liquid phase. Two kinds of TiC with the particle sizes of 1.0 μm and 10 μm were used to study the influences of solid size on viscosity, and it was found the TiC particle with a small size can increase the viscosity much more greatly. The Einstein-Roscoe equation cannot be used directly to the TiC containing two-phase mixtures. By modifying the parameter, it can well describe the viscosity variation behavior. According to the calculated results, the maximum volume fraction increases as increasing the rotation speed or decreasing the particle size of TiC. The apparent volume of TiC is about 2.2-3.3 times of its real volume.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Influence of TiC on the Viscosity of CaO–MgO–Al2O3–SiO2–TiC Suspension System

2015

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“…As Figure 2.27 shown, Wu construct a series study of paraffin/silicon oil system under room temperature condition. The particle size ranges from 150 um to 450 um reported similar results, which is only slightly derivate 1.2% [9]. Konijn constructs viscosity measurement of glycerine/polymethylmethacrylate system and also reported that the particle size did not impact on the suspension viscosity [167].…”

Section: Effects Of Particle Sizesupporting

confidence: 67%

“…For silicate melts, at high-temperature condition, Wu discovered that the slag will become shear thinning fluid above 15% solid fraction [9]. The viscosity of suspension system will be reviewed in Section 2.5.…”

Section: Liquid Viscosity Definitionmentioning

confidence: 99%

Viscosity Studies of High-Temperature Metallurgical Slags Relevant to Ironmaking Process

Chen¹

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Abstract:Slags are molten oxides presenting in a number of high-temperature processes. In ironmaking process, the metallurgical properties of blast furnace slags are determined largely by its viscosity. Understanding and controlling the behavior of the slag phase is crucial in improving the operational and economical efficiencies. However, high-temperature viscosity measurement is practically difficult, time-and cost-consuming. There is a necessity to develop a reliable mathematical model for the viscosity prediction through the review of experimental data and fundamental theory.As foundation work, abundant viscosity measurements and models have been examined and evaluated, including over 3000 viscosity data in the CaO-MgO-Al 2 O 3 -SiO 2 system and 16 viscosity models. Over the past 10 years, there has been increasing attentions on wide composition range of slag viscosity due to the continuous consumption of complex iron ores.In addition, the impacts of eight minor elements (including F, Ti, B, Fe, Mn, Na, K, and S) on slag viscosity have been studied for practical purpose.Slag viscosity is determined by its structure, which is the theoretical base of the mathematical model. The structures of the quenched silicate slags were quantitatively investigated utilizing Raman spectroscopy. It is accepted that the application of Raman spectroscopy can disclosure the vibration units of molten slag, which can be interpreted the structural of silicate melts (amorphous glass phase).In the blast furnace operations, some solid phases such as oxide precipitates, coke or Ti(CN) can be present in the slag. In addition, the precipitation of solid particles was commonly observed in iron, steel, copper and other pyrometallurgy process. These solids can significantly increase the viscosity of the slag causing operating difficulty. There is a research gap that the solid impact on suspension was limited investigated under high-temperature condition due to uncertainty.Referring to the research gap of viscosity study of blast furnace slag, the following goals have been achieved by the Ph.D. candidate: Declaration by authorThis thesis is composed of my original work, and contains no material previously published or written by another person except where due reference has been made in the text. I have clearly stated the contribution by others to jointly-authored works that I have included in my thesis.

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“…The phase fraction of SP is derived according to the following equation: [16]. Solids have in general much higher impact on viscosity than minor alteration of, for instance, the slag composition [21]. In the present study, the effect of temperature on the phase fraction of SP in the solid-liquid mixture is negligible in the temperature range of 1573-1773 K. The temperatures within this range could therefore be expected to have a relatively small impact on the slag fluidity and thereby the V extraction.…”

Section: Temperature Impact On the Phase Relationsmentioning

confidence: 99%

Vanadium Extraction from a Fe–V (2.0 Mass%)–P (0.1 Mass%) Melt and Investigation of the Phase Relations in the Formed FeO–SiO2-Based Slag with 20 Mass% V

Lindvall¹,

Tikka

Berg

et al. 2017

J. Sustain. Metall.

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An innovative and sustainable way for production of vanadium is to co-process vanadium titanomagnetite ores with vanadium-bearing slag from steel industry, via reduction, producing a hot metal containing about 2 mass% vanadium, 0.1 mass% phosphorus, and 0.4 mass% silicon. A vanadium-extraction method was developed for these hot metals using a semi-industrialscale converter. Oxidation was carried out with an air jet enriched to 50 vol% oxygen and by top-charging up to 70 kg iron ore pellets per ton hot metal. The complete dissolution of pellets was achieved by deliberately creating good stirring conditions utilizing high momentary decarburization rates. The temperature could be controlled to around 1677 K at the blowing endpoint after the pellet coolant had been dissolved. Produced vanadium slags contained as high as 20 mass% V. The semifinished product contained about 3 mass% carbon and 0.1 mass% vanadium, corresponding to a vanadium yield of 94%. The phosphorus distribution to the slag was low when good stirring was maintained. The slag composition had a more significant impact than the temperature on the vanadium distribution. Laboratory-scale study also showed that the temperature impact on the composition of the liquid phase was minor.

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The Effect of Solid Particles on Liquid Viscosity

Cited by 61 publications

References 27 publications

Influence of TiC on the Viscosity of CaO–MgO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub>–TiC Suspension System

Influence of TiC on the Viscosity of CaO–MgO–Al<sub>2</sub>O<sub>3</sub>–SiO<sub>2</sub>–TiC Suspension System

Viscosity Studies of High-Temperature Metallurgical Slags Relevant to Ironmaking Process

Vanadium Extraction from a Fe–V (2.0 Mass%)–P (0.1 Mass%) Melt and Investigation of the Phase Relations in the Formed FeO–SiO2-Based Slag with 20 Mass% V

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