Effect of coal blending on ash-fusion and viscosity-temperature characteristics
Liu Shuo
Zhou Anning
Yang Fusheng
Jing Yunhuan
Abstract：The extremely low fusion temperature and low viscosity of coal ash were the critical factors influencing on the long-period stable operation of large-scale entrained-flow gasifiers in Ningdong coal chemical industries,therefore the effect of coal blending on ash-fusion and viscosity-temperature characteristics were systematically investigated by XRD,Factsage,ash-melting tester and high temperature rotary viscometer,respectively.Results show that the coal blending ratio is nonlinear with ash-fusion and viscosity-temperature characteristics.The blending of SM coal and MK coal with a ratio of 2 ∶ 8 achieving the ash-fusion temperature of 1 300 ℃ and viscosity 5 Pa · s basically satisfies the operational requirements of Texaco gasifier.The main mineral with high melting point in the blended coal ash is quartz.It can be concluded that the blending of coals can effectively improve the ash-fusion and viscosity-temperature characteristics.
Keywords：coal blendingash-melting characteristicsash viscosity-temperature characteristicsNingdong coal
Publication Date：2017-01-01