Combined burner for blowing oxidizing gas and fuel into melting furnace

A combined burner for blowing oxidizing gas and fuel into a melting furnace, the combined burner being fixedly installed into the melting furnace and being provided with outlet apertures for fuel and oxidizing gas, wherein the burner comprises:

• a fixed part;
• and
• a movable nozzle, the movable nozzle having the outlet apertures for both fuel and oxidizing gas to flow out of the movable nozzle,
• wherein the movable nozzle is rotatably installed inside a body of the fixed part of the burner, and is rotatable about a rotation axis x1,
• wherein a supply of the oxidizing gas is connected to the movable nozzle and motion of the movable nozzle is controlled by an actuator, installed outside of a working space of the melting furnace,
• wherein a central axis x2 of at least one of the outlet apertures of the movable nozzle is diverted from the rotation axis x1 of the movable nozzle by angle α in a range of 5-60°, and the movable nozzle is rotatable around the rotation axis x1 in any direction by an angle β in a range of 0-180°, such that when the movable nozzle is rotatable around the rotation axis x1, a supplying direction of the fuel or the oxidizing gas that flows out of said at least one of the outlet apertures moves between two different operation positions.