Authors:
Jun-hyun Kim | Chosun Refractories Co., Ltd. | Republic of Korea
Sang-Bae Choi | Chosun Refractories Co., Ltd. | Republic of Korea
Chul-young Park | Chosun Refractories Co., Ltd. | Republic of Korea
Dong-jun Lee | POSTECH | Republic of Korea
Yong-min Cho | POSTECH | Republic of Korea
Prof. Dr. Youn-bae Kang | POSTECH | Republic of Korea
Min-Suk Kim | Chosun Refractories Co,. Ltd | Republic of Korea
Sang-Ahm Lee | Chosun Refractories Co., Ltd. | Republic of Korea
One of the causes of nozzle clogging during continuous casting of molten steel is interfacial chemical reaction between the refractory and the molten steel. Several researches have been conducted on the interfacial reaction product. However, evaluation of the interfacial chemical reaction have been insufficient. Without evaluation of the interfacial reaction, it is difficult to find out the refractory material capable of reducing the nozzle clogging. Therefore, in the present study, the interfacial chemical reaction between the refractory and molten steel was assessed in various ways: volume of the gas released from the refractory, evolution of steel components during reaction between the refractory and molten steel, thickness of the interfacial reaction product. Also, Various nozzle refractories composed of different constituents were employed: alumina-silica-C base, SiO2-less, lime-zirconia-C base, C-less, and oxide-less refractories. Based on the evaluation results, the refractory material capable of reducing the nozzle clogging was suggested, which can also contribute to the design direction of the nozzle material. It was found that the oxide-less refractory was efficient to reduce clogging, followed by SiO2-less refractory.
Keywords
Nozzle clogging, Oxide-less, Interfacial reaction, Refractory