METHOD, ARRANGEMENT AND PELLETISING PLANT
This invention concerns a method for the oxidation and sintering of pellets 1 arranged in a compartment 2 in which the oxidation and sintering take place with the aid of a medium with a defined temperature, which medium heats the pellets 1. The method comprises the introduction of a first medium 3 into the compartment through an inlet 4 connected to the compartment 2 and the heating of the medium in the inlet through the use of a combustion arrangement 5, or a part of a combustion arrangement, arranged in the inlet 4 and comprising fuel where the use of the combustion arrangement 5 comprises the ignition of the fuel, the combustion of the fuel whereby combustion heat is developed, and the transfer of combustion heat to the first medium 3 that is present at the combustion arrangement 5. The method is characterised by the arrangement of the combustion arrangement 5, or a part of it, in a region A in the inlet 4 that in turn is arranged outside of the direct passage of the first medium in and through the inlet 4 such that the ignition of the fuel, the combustion of the fuel and the transfer of combustion heat to the first medium 3 take place in this region A, and by the introduction of a second medium 6 into the region A in the direct vicinity of the combustion arrangement 5, or a part of it, where the ignition of the fuel, the combustion of the fuel and the transfer of combustion heat also to the second medium 6 take place followed by further transport of the heated first medium 3 and the heated second medium 6 through the inlet 4 and into the compartment 2. The invention concerns also an arrangement 9 and a pelletising plant 13.