Unshaped refractory composition of basic dam block for tundish

摘要

The present invention relates to a monolithic refractory composition used as a basic dam block for a tundish, wherein the refractory composition comprises magnesia clinker as a main material, alumina cement, sodium hexametaphosphate and calcite₃The present invention relates to a tundish basic dam block for tundish which has excellent resistance to corrosion, invasion, and resists, and which can exhibit sufficient strength at room temperature and high temperature by suitably forming alumina powder as a hot-Composition, which has its object.;In order to accomplish the above object, the present invention provides a method for producing a cement admixture, comprising the steps of: mixing alumina powder with 5 to 9 wt%, alumina cement with 2 to 5 wt%, sodium hexametaphosphate with 3 to 5 wt% The present invention relates to a monolithic refractory composition of a basic dam block for tundish which is composed of the remaining magnesia clinker in a range of 1: 6 to 1: 8.5 and is subjected to inlet molding.