连铸用复合式镁炭质塞头及水口的使用性能分析

Analysis of working properties for composite MgO-C stopper and nozzle in con-casting

以ＭｇＯ６９．３％，ＣａＯ３０．７％，ＳｉＯ２０％－ＭｇＯ８２．２％，ＣａＯ０％，ＳｉＯ２１７．８％假二元系相图为依据，着重研究了ＭｇＯ－２ＭｇＯ·ＳｉＯ２系材料的高温特性，分析了低ＣａＯ／ＳｉＯ２比镁炭质连铸用耐火材料；该材料具有良好的抗侵蚀性和弥合密封性、这是控制元件尤其是塞头。

Based on binary system phase diagram with MgO 69. 3%,CaO 30. 7a,SiO2 0% - MgO82. 2%. CaO 0%. SiO217. 8 %, the high temperature property of MgO-2MgO·SiO2 reflactory has been investigated and the MgO-C refractory with low CaO/SiO2 ratio used in con-casting has been analysed. The material possesses favourable properties of corrosion resistance, closing and sealing.