Effect of Heat Treatment Temperature on Properties of Chinese Calcined Flint Clay Based Plastic Refractories

Effects of different heat treatment temperatures on properties of Chinese calcined flint clay based plastic refractories were investigated using Chinese calcined flint clay as starting material, aluminum sulfate and fireclay as binding system. The results showed that with temperature rising, Chinese calcined flint clay based plastic refractories shrinked firstly and then expanded. The modulus of rupture （MOR） and the cold crushing strength （CCS） inereased firstly and then decreased from 110 ℃ to 600 ℃ , then increased obviously. Thermal expansion coefficient increased from 110 ℃ to 760 ℃, decreased from 760 ℃ to 1 300 ℃ , and increased from 1 300 ℃ to1500 ℃.

铝酸钙水泥对焦宝石基喷涂料性能的影响

以焦宝石颗粒及细粉为主要原料,铝酸钙水泥为结合系统,分别研究了不同铝酸钙水泥含量对焦宝石基喷涂料性能的影响。结果表明,焦宝石基喷涂料的抗折强度随着铝酸钙水泥含量的增加呈上升趋势,但经过600℃、1000℃和1300℃烧结后的焦宝石基喷涂料的耐压强度随着铝酸钙水泥含量的增加呈先增加后减小的趋势。

棕刚玉、铝矾土对焦宝石基喷涂料性能的影响

研究了棕刚玉和铝矾土对焦宝石基喷涂料性能的影响。研究表明,随热处理温度的提高焦宝石基喷涂料体系的线变化率表现为:单添加棕刚玉时收缩,单添加铝矾土时先收缩后膨胀,两者双添加时则先收缩后膨胀最后再收缩;双添加棕刚玉和铝矾土的体系其线变化率的变化趋势接近于单添加棕刚玉体系,而抗折强度、耐压强度变化则接近于单添加铝矾土体系;单添加棕刚玉体系在110℃、1000℃、1300℃时的抗折强度、耐压强度波动范围最小。