Care must be taken to completely seal entrance plugs(eg. at a manway)in refractory linings.

必须小心地完全封闭耐火材料里进口门。

The Preparation method of cheap aluminium dihydric phosphate and its application in refractories have been intro-duced.

提供了廉价磷酸二氢铝制备方法，了它在耐火材料中应用。

The medium and small - sized furnace stack gunning with unshaped refractory materials is a new repatching technology.

中小型高炉炉喷补是采用不定型耐火材料以喷射法修复炉一项新技术。

The coatings composed by the chosen refractory is crackfree in high temperature.The castings using the coatings is free of surface defect and the surface roughness can reach 18 - S.

根据此法选出耐火材料所组成涂料在高温急热时不开裂，浇注出铸件表面无缺陷，表面粗糙度达18-S。