TY - JOUR

T1 - Design, operation and evaluation of an improved refractory wear testing technique

AU - Kircher, Volkmar

AU - Burhanuddin, null

AU - Harmuth, Harald

PY - 2021/4/17

Y1 - 2021/4/17

N2 - A newly developed Continuous Wear Testing Device (CWTD) based on a rotating cylinder specimen enables in-situ wear rate measurements of fine ceramic dissolution in slags. A corroding fine ceramic sample is measured several times during a corrosion test with a high precision 3D laser measurement system. Mass loss derived from this measurement is compared with direct determination by load cells. Optimal flow conditions for static and dynamic measurements are achieved by a high ratio of slag mass to immersed sample mass and by an adjustable rotation speed. Corrosion of Al2O3 fine ceramic cylinders in a CaO-MgO-Al2O3-SiO2 slag at 1550 °C demonstrated the occurrence of Marangoni convection and lower corrosion rate for a static measurement, while Taylor vortices appeared with a dynamic setup. The accuracy of the wear measurement was assessed and evaluated for corrosion profiles which enable the identification of kinetic models for the calculation of diffusivities.

AB - A newly developed Continuous Wear Testing Device (CWTD) based on a rotating cylinder specimen enables in-situ wear rate measurements of fine ceramic dissolution in slags. A corroding fine ceramic sample is measured several times during a corrosion test with a high precision 3D laser measurement system. Mass loss derived from this measurement is compared with direct determination by load cells. Optimal flow conditions for static and dynamic measurements are achieved by a high ratio of slag mass to immersed sample mass and by an adjustable rotation speed. Corrosion of Al2O3 fine ceramic cylinders in a CaO-MgO-Al2O3-SiO2 slag at 1550 °C demonstrated the occurrence of Marangoni convection and lower corrosion rate for a static measurement, while Taylor vortices appeared with a dynamic setup. The accuracy of the wear measurement was assessed and evaluated for corrosion profiles which enable the identification of kinetic models for the calculation of diffusivities.

KW - Corrosion

KW - Laser measurement

KW - Wear profiles

KW - Refractories

KW - Fine ceramics

KW - Alumina

KW - Fine ceramics

KW - Refractory

KW - Wear profiles

KW - Laser measurement

KW - Corrosion

UR - https://doi.org/10.1016/j.measurement.2021.109429

U2 - 10.1016/j.measurement.2021.109429

DO - 10.1016/j.measurement.2021.109429

M3 - Article

VL - 178.2021

JO - Measurement

JF - Measurement

SN - 0263-2241

IS - June

M1 - 109429

ER -