... % (≥)485565758085Refractoriness °C (≥)175017701790179018201850Refractoriness under load, 0.2MPa, °C (≥)142014501500152015301550Permanent linear Change % 1500°C ,2h0.1-0.41450°C ,2h0.1-0 ... in blast furnaces, Hot Blast Stove,Steel ladle lining, Reheating furnace, Cement kiln, Tunnel kiln,boiler, coke oven, carbon ...