Effect of crystalline phase formation on coal slag viscosity

摘要: Abstract The Texaco Gasification Process employs a high temperature and pressure slagging gasifier, in which the viscosity of slag plays key role determining operating conditions. Empirical models are available literature predict as function composition. However, these applicable only to homogeneous slags. formation crystalline phases during cooling can significantly change viscosity, often fail correct behavior. its effect on were studied four coal coals include SUFCo, Pittsburgh No. 8, two Powell Mountain (A B). Slag was measured at temperatures range 1150–1500°C under reducing atmosphere. viscosities Sufco A (PMA) exhibited behavior glassy slag, gradually increases decreases. other two, 8 B (PMB), showed with T cv 1300°C 1430°C, respectively. Crystalline phase analysis samples revealed that extensive network dendrite spinels PMB caused rapid increase while anorthites SUFCo large elongated particles corundum PMA did not affect much.