The Properties of MgO-C Materials with Different Graphite Size Distributions

Abstract:

Monolithic stopper is one of the functional refractories. The security and continuity of the continuous casting maybe irrupted by the abnormal condition of monolithic stopper. MgO-C material composite monolithic stopper is often used to cast Ca-treated steel. But the thermal expansion of MgO-C materials is relatively large and there is a poor thermal matching between rod part and body part. To improve thermal shock resistance of MgO-C materials, the properties of MgO-C materials with different graphite size distributions are researched. The results show that 1000 mesh graphite addition will decrease thermal shock resistance, fracture energy and thermal expansion will increase. MgO-C materials with combined addition of 595 and 199 graphite present good thermal shock resistance. The trends of thermal shock resistance for MgO-C refractories by immerging molten steel methods agree with that of Rst.

• Periodical: Advanced Materials Research (Volumes 503-504)
• Pages: 611-614
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.503-504.611
• Online since: April 2012
• Authors: Guo Qi Liu, Hong Xia Li, Jin Song Yang, Jian Bin Yu, Wen Gang Yang, Tian Fei Ma, Fan Qian
• Keywords: MgO-C Materials, Monolithic Stopper, Thermal Shock Resistance

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DOI: 10.1016/s0955-2219(00)00308-3