Viscosity measurement of mould fluxes using inclined plane test and development of mathematical model

Abstract

During the current research and development activities at Tata Steel Teesside Technology Centre, UK, the inclined plane test (IPT) is adopted as a quick method to measure the viscosity/ fluidity of mould powders being used currently for continuous casting of different steel qualities and section sizes. The usefulness of the IPT method was also validated by comparing the viscosities that were measured by a high temperature viscometer. It has been established that the IPT measured viscosity values are comparable with the mould powder supplier's data. The IPT ribbon lengths of different powders have been correlated with the viscosities using an Arrhenius type relationship. The ribbon lengths of the solidified fluxes were found to have a good correlation with the molar ratios of the corresponding powders. Hence, the relationship was further tuned to develop a viscosity prediction model using the chemical compositions of the mould fluxes (i.e. the model can be used for a quick assessment of mould flux viscosity based on its chemical composition).

Catalytic Pyrolysis of Chilean Oak: Influence of Brønsted Acid Sites of Chilean Natural Zeolite

“…A homemade device was developed for this purpose, placing a glass surface in a 45 • plane structure. This technique has been previously used for the estimation of viscosity [43]. A calibration curve for the homemade device was obtained using commercial oil samples with known viscosities.…”

Prediction of the ribbon length to determine the viscosity of ladle-refining powder containing CaF2 using inclined plane test and advanced mathematical model

“…Researchers have investigated the parameters affecting the determination of viscosity of the LRC powder. Dey et al [3], used a mathematical model to investigate and calculate the viscosity of the mould fluxes (a mixture of different oxides such as calcia, silica, alkali oxides and calcium fluoride) at Tata Steel Teesside Technology Center and the relationship between the viscosity obtained using the ribbon lengths of the IPT method shown with the chemical composition of the mould powders. Jonson et al [4], evaluated the viscosity of the ladle purifying powder (Al 2 O 3 -CaO-MgO-SiO 2 ) using the Arrhenius relationship and the rotating-cylinder method at Ovaka Steel.…”

Characterization and Assessment of Mold Flux for Continuous Casting of Liquid Steel Using an Inverse Mold Simulator

“…[1][2][3][4][5] However, these techniques do not take into account the changes associated with the dynamic conditions and interactions prevailing in the continuous casting mold. The viscosity of the mold flux has been considered as one of the most important fluid properties, [6][7][8] as it controls the molten mold flux infiltration between the copper mold and solidifying steel shell.…”