Quantification of Magnesia Dissolution in Silicate Melts and Diffusivity Determination Using Rotating Finger Test
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in: Applied Sciences : open access journal, Jahrgang 12.2022, Nr. 24, 12791, 13.12.2022.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - Quantification of Magnesia Dissolution in Silicate Melts and Diffusivity Determination Using Rotating Finger Test
AU - Burhanuddin, Burhanuddin
AU - Harmuth, Harald
AU - Vollmann, Sandra
PY - 2022/12/13
Y1 - 2022/12/13
N2 - Refractories exposed to corrosive melts at high temperatures experience wear due to dissolution. The presented work deals with the dynamic corrosion of magnesia fine ceramics in a CaO–Al2O3–SiO2–MgO silicate slag with a CaO/SiO2 weight ratio of 0.65. Finger tests at 200 rpm at three different temperatures, 1450, 1500, and 1550 °C, were performed. A contemporary rotary finger test (RFT) device with in-situ wear profile measurement using a laser device was used. The precise dimension measurements with high-resolution facilitate the determination of total mass flux densities, which allow for determination of effective binary diffusivities. Thereby, two methods based on Sherwood relations were applied. The comparison shows the benefit to better consider deviations from pure cylinder shape. The use of contemporary RFT devices and magnesia fine ceramics allows reliable determination of the effective binary diffusivity.
AB - Refractories exposed to corrosive melts at high temperatures experience wear due to dissolution. The presented work deals with the dynamic corrosion of magnesia fine ceramics in a CaO–Al2O3–SiO2–MgO silicate slag with a CaO/SiO2 weight ratio of 0.65. Finger tests at 200 rpm at three different temperatures, 1450, 1500, and 1550 °C, were performed. A contemporary rotary finger test (RFT) device with in-situ wear profile measurement using a laser device was used. The precise dimension measurements with high-resolution facilitate the determination of total mass flux densities, which allow for determination of effective binary diffusivities. Thereby, two methods based on Sherwood relations were applied. The comparison shows the benefit to better consider deviations from pure cylinder shape. The use of contemporary RFT devices and magnesia fine ceramics allows reliable determination of the effective binary diffusivity.
KW - dissolution
KW - finger test
KW - diffusivity
KW - magnesia fine ceramics
U2 - 10.3390/app122412791
DO - 10.3390/app122412791
M3 - Article
VL - 12.2022
JO - Applied Sciences : open access journal
JF - Applied Sciences : open access journal
SN - 2076-3417
IS - 24
M1 - 12791
ER -
