Entrained flow coal gasification method employing solid state slag-tap suitable for high ash content and high ash melting point coal

The invention provides a coal gasification method employing solid state slag-tap suitable for high ash content and high ash melting point Huainan coal. According to the invention, the gasification reactor temperature is controlled higher than 1100 DEG C and lower than the softening temperature of the high ash melting point coal. Through adjusting the ratio of gasification reactor height and diameter, the included angle of gasification reactor cone part and gasification reactor vertical housing part, the ratio of gasification reactor interior diameter and slagoff port diameter, the ash slag isdischarged as solid state without fluxing medium. The method greatly reduces the operation temperature of the gasification reactor, prolongs the service life of fittings in the gasification reactor with little heat dissipation and low demand of refractory materials grade in the gasification reactor, simultaneously reduces the specific oxygen consumption and specific coal consumption, thereby not only saving cost but also