A burner process for iron fuel combustion, comprising the steps of: providing an iron fuel suspension medium comprising iron fuel and oxygen in a suspension solid density of between 2 to 15 kg/Nm.sup.3 and more preferably of between 4 to 8 kg/Nm.sup.3; introducing said iron fuel suspension medium into an iron fuel burner arrangement at a velocity of between 5.5 and 55 m/s and more preferably between 20 and 40 m/s; introducing air from air inlet means into said iron fuel burner arrangement, wherein said air from said air inlet means is introduced with an overall angular momentum ratio between said air and said iron fuel suspension medium of between 3 and 12 and more preferably between 3.8 and 8.9; mixing said iron fuel suspension medium by subjecting it with said air such that an overall oxygen-to-fuel equivalence ratio is obtained between 1.0 and 2.5 and more preferably between 1.2 and 1.8 for obtaining a combustible medium in the said burner arrangement; igniting said combustible medium to provide a combusting iron fuel containing medium.