Slag melt viscosity

It is necessary to measure the viscosity under the condition of a small Reynolds number, and experiments with high precision can be expected for viscosities over 0.1 Pa s. This method has also been used to measure the viscosity of slag melts,when the time taken to pull a ball out of the melt with constant force was measured. 

The slag viscosity-temperature relationship for completely melted slag is... 

Shear viscosity is a measure of the ahihty of one layer of molecules to move over an adjacent layer. Bulk viscosity will be mentioned in Section V.2. Since viscosity usually refers to shear viscosity, the term will he used in this way unless otherwise stated. Recommended techniques for measuring the viscosity of high-temperature melt are given below. Experimental data are available from the database mentioned in Section 1.2. Data on viscosities of slags (7 single component systems, 35 two-component... 

Viscosity (r ). Several models have been reported for the estimation of viscosities (q) of silicate melts to cover the compositional ranges of glasses steelmaking slags magmas (15-lJ)... 

In order to model the flow behavior of molten silicate suspensions such as magmas and slags, the rheological behavior must be known as a function of the concentration of suspended crystals, melt composition, and external conditions. We have determined the viscosity and crystallization sequence for a Kilauea Iki basalt between 1250°C and 1149°C at 100 kPa total pressure and f02 corresponding to the quartz-fayalite-magnetite buffer in an iron-saturated Pt30Rh rotating cup. viscometer of the Couette type. The apparent viscosity varies from 9 to 879 Pa.s. The concentration of suspended crystals varies from 18 volume percent at 1250°C to 59 volume percent at 1149 C. The molten silicate suspension shows power-law behavior ... 

Thus it will be of great value to be able to predict to some extent the crystallization behaviour of coal ash melts. For simplicity it is necessary to consider that crystallization will be from a homogeneous melt. The data may be applied to the phenomena of boiler slagging by using an accurate model of the viscosity of ash melts based on chemical composition. The main aim of the study has been to obtain relevant crystallization data of coal ashes and... 

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