Abstract: For an integrated gasification combined cycle（IGCC） unit, analyses were conducted on the problem of the frequent overheating and burnout of the burner nozzle tip during commissioning and operation, and three retrofit schemes was proposed and compared. Test results show that through changing the dimension of the nozzle tip, upgrading the material of the nozzle tip, etc., the overheating of the nozzle tip can be alleviated effectively, while the service life of the burner nozzle can be increased.