Research on application of kyanite in plastic refractory

• Published in: Acta geochimica 2013-09, Vol.32 (3), p.326-330
• Main Authors: Zhang, Wei, Meng, Qian, Dai, Wenyong
• Format: Article
• Language: English
• Subjects: Aluminum; Aluminum sulfate; Clay; Curing; Earth and Environmental Science; Earth Sciences; Geochemistry; High temperature; Minerals; Plastics; Raw materials; Thermal expansion; 加热处理; 应用; 粘土塑料; 耐火可塑料; 耐火材料; 耐热冲击性; 膨胀系数; 蓝晶石
• ISSN: 1000-9426; 2096-0956; 1993-0364; 2365-7499
• DOI: 10.1007/s11631-013-0639-x

Effect of kyanite addition on properties of plastic refractories that based on Chinese calcined flint clay were investigated with the Chinese calcined flint clay as raw materials, aluminum sulfate and fireclay as binding systems. After 24 h curing after demoulding and another 24 h curing at 110℃, the specimens were heat-treated at 1000, 1300 and 1500℃ for 3 h, respectively. The permanent linear change, bulk density, modulus of rupture, clod crushing strength, thermal expansion coefficient and thermal shock resistance were examined. The results show that the shrinkage of plastic refractory decreased with increasing kyanite addition after heat-treated at 1000 and 1300℃, and its expansivity increased with increasing kyanite addition after heat-treated at 1500℃. The strength can be in- creased when kyanite was added into the plastic refractory. The thermal expansion coefficient and the expansivity were increased, and the shrinkage can be reduced at high temperature when kyanite addition was more than 10%. On the condition of this experiment, the thermal shock resistance of plastic refractory was the best when kyanite addition is w（kyanite）=10%.