Method, arrangement, and pelletising plant

摘要

A method during the oxidation and sintering of pellets includes the introduction of a first medium into the compartment through an inlet connected to the compartment and the heating of the first medium in the inlet through the use of a combustion arrangement. The use of the combustion arrangement includes the ignition of the fuel, combustion of the fuel, and the transfer of the combustion heat to the first medium that is present at the combustion arrangement. A second medium is introduced to the inlet through an intake in the direct vicinity of the combustion arrangement, where the ignition of the fuel and the combustion of the fuel take place for the transfer of combustion heat also to the second medium. The heated first medium and the heated second medium are mixed before or during their introduction into the compartment.

主权项

1. A method for oxidation and sintering of pellets arranged in a compartment in which sintering takes place with a medium with a high temperature, which medium heats the pellets, the method comprising:
introducing a first medium into the compartment through an inlet connected to the compartment; heating the first medium in the inlet through use of a combustion arrangement or a part thereof arranged in the inlet, wherein the combustion arrangement or a part thereof comprises fuel where the use of the combustion arrangement or a part thereof comprises an ignition of the fuel, a combustion of the fuel whereby combustion heat is developed, and a transfer of the combustion heat to the first medium that is present at the combustion arrangement or a part thereof; introducing a second medium into the inlet through an intake in a direct vicinity of the combustion arrangement or a part thereof where the ignition of the fuel and the combustion of the fuel take place for the transfer of combustion heat also to the second medium that is present at the combustion arrangement or a part thereof, and the mixing of the heated first medium and the heated second medium before or during their introduction into the compartment; and preheating the first medium before it is introduced into the inlet and preheating the second medium before it is introduced in the vicinity of the combustion arrangement or a part thereof in the inlet, wherein the first medium and the second medium are preheated to different temperatures.