一、前言近十几年来,国内外迅速发展起来的各种真空脱气的“炉外精炼”方法,已经发展成“二次炼钢”新技术,并作为改善钢的质量、增加品种、提高产量的重要途径而被广泛采用。但国产耐火材料质量满足不了“炉外精炼”装置的要求,不得不在引进或自制“炉外精炼”装置的同时,进口耐火砖。因此,立足于在国内解决耐火材料,已成为当务之急。从1978～1981年,上海第二耐火 I. Introduction In recent decades, various vacuum degassing methods developed at home and abroad have evolved into “secondary steelmaking” new technologies. As a method to improve the quality of steel, increase varieties and increase An important way of production is widely used. However, the quality of domestically produced refractories can not meet the requirements of the “furnace refining” device, and refractory bricks have to be imported while introducing or self-made “furnace refining” devices. Therefore, based on the domestic solution to refractory materials, has become a top priority. From 1978 to 1981, the second Shanghai fire