Arrangement for Heating a Process Gas of an Iron Ore Pelletizing Plant

An arrangement for heating a process gas of an iron ore pelletizing plant, the arrangement comprising:

• a heating chamber comprising a process gas inlet, a process gas outlet, a wall extending from the process gas inlet to the process gas outlet, and a heating chamber port arranged in the wall at a point intermediate to the process gas inlet and the process gas outlet;
• a burner assembly arranged to be connectible to a source of gaseous fuel and a to source of oxidant gas;
• a precombustion chamber;
• wherein the precombustion chamber comprises a burner port and a wall extending from the burner port to the heating chamber port;
• wherein the burner assembly is arranged in the burner port of the precombustion chamber and wherein, when in operation, the burner assembly is arranged to introduce the gaseous fuel, the oxidant gas and/or combustion products thereof into the precombustion chamber;
• and
• wherein the burner assembly comprises a fuel lance, wherein a nozzle of the fuel lance comprises a plurality of outlet holes, and wherein at least one of the plurality of outlet holes is arranged at an angle relative to a longitudinal axis of the fuel lance.