Method, arrangement, and pelletising plant

A method for heating of a medium in a compartment in which iron ore pellets are arranged to be oxidized and sintered with the aid of the medium, the method comprising:

• introducing a first medium into the compartment through an inlet connected to the compartment;
• heating the first medium in the inlet using a combustion arrangement or a part thereof arranged in the inlet, wherein the combustion arrangement or a part thereof comprises fuel, where the using of the combustion arrangement or a part thereof comprises the ignition of the fuel, combustion of the fuel, whereby combustion heat is developed, and transfer of the combustion heat to the first medium at the combustion arrangement or a part thereof;
• and
• placing, during the heating of the first medium, the combustion arrangement or a part thereof in a region in the inlet that, in turn, is arranged outside of a direct passage of the first medium in and through the inlet such that the ignition of the fuel, the combustion the fuel and the transfer of combustion heat to the first medium take place in this region, followed by onward transport of the heated first medium from the region into the compartment through the inlet.