Development and Application of Basic Dam Block for Tundish

摘要

In oeder to develop high performance basic dam block for tundish vessel in steel-making process, influences of raw materials, binders and additives on hydration and thermal characteristics of magnesia castable refractories were studied. Crack initiation and propagation in cement bonded magnesia castables due to slaking of magnesia clinker at drying process were suppressed by using spinel clinker instead of magnesia powder. In case of A_CO centre dot 2CaO centre dot P_2O_5 (NC_2P) bonded castable, crack initiation due to slaking of magnesia clinker did not occur but bending strength at high temperature was low. Mechanical properties of NC_2P bonded castable refractories at high temperature were improved by using magnesia clinker that contains low SiO_2 contents.