Effect of Selenium on the Interaction Between Refractory and Steel
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Effect of Selenium on the Interaction Between Refractory and Steel LIMEI CHENG, WEN YANG, YING REN, and LIFENG ZHANG The presence of surface-active selenium in liquid steel has an obvious effect on the wettability between steel and inclusions, significantly affecting inclusion behaviors in liquid steel. In the current study, the influence of surfactant on the interaction between the refractory and liquid iron was investigated. The contact angles between the refractory and liquid iron with and without the selenium addition were measured using the sessile drop method at 1873 K. Besides, the interfacial reaction layer between the iron and refractory was investigated using scanning electron microscopy. It was found that the addition of selenium increased the contact angle between the iron and the refractory and affected the penetration behavior of liquid iron into the refractory. https://doi.org/10.1007/s11663-019-01545-9 The Minerals, Metals & Materials Society and ASM International 2019
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INTRODUCTION
REFRACTORIES are widely used in the steel industry, such as the blast furnace lining, steel ladle lining, and tundish lining,[1] due to its high corrosion resistance, low thermal expansion, and good thermal conductivity. In the steel production process, the refractory as the vessel lining material directly contacts with the molten steel. The interaction between the refractory and steel has a significant influence on the service life of the ladle lining, the steel quality,[2,3] and the production safety. The corrosion resistance to the molten steel is one of the major issues for the production of the high-quality steel. Recently, with the increase of demands for the advanced refractory in the metallurgical industry, more and more attention is focused on the interaction between the refractory and steel.[4–11] Huang et al.[9] investigated the effect of the alumina-magnesia refractories and the molten steel interaction on the steel cleanliness during the smelting process. It was indicated that alumina-magnesia carbon-free castable can be used as the lining material for the production of high-quality alloy steel. Wei et al.[10] studied the reaction mechanism of the alumina carbon refractory and Fe system by the thermal gravity experiment with different temperatures and soaking times. It was concluded that carbonaceous materials played a key role in the interaction of the LIMEI CHENG, WEN YANG, YING REN, and LIFENG ZHANG are with the School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing (USTB), Beijing 100083, China. Contact emails: [email protected], [email protected] Manuscript submitted October 31, 2018.
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refractory and steel. The presence of refractory in iron was mainly caused by the carbothermic reduction of Al2O3 and carbonaceous materials, instead of the dissolution of Al2O3 in iron. Fruhstorfer et al.[11] investigated the corrosion of alumina refractory by alloyed steels. It was proposed that interactions between the steel all
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