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 ℃.

热处理温度对焦宝石-铝矾土浇注料性能的影响

以焦宝石、铝矾土、蓝晶石和粘土为主要原料,铝酸钙水泥为结合系统,研究了不同热处理温度对焦宝石-铝矾土浇注料性能的影响。试样自然干燥24 h脱模后,再经110℃烘干24 h,分别于1000℃、1300℃和1500℃热处理3 h。检测各温度热处理后试样的线变化率(P.L.C)、体积密度(B.D)、抗折强度(M.O.R)、耐压强度(C.C.S)以及试样的热膨胀系数。结果表明,随着热处理温度的提高,焦宝石-铝矾土浇注料的体积密度减小;线变化率随着热处理温度的提高呈现收缩先增大后减小最终出现膨胀的变化规律。焦宝石-铝矾土浇注料的抗折强度和耐压强度随着热处理温度的提高而增大。焦宝石-铝矾土浇注料的热膨胀系数随着热处理温度的提高而减小。