FEEDING CENTER PLATE IN A PULP OR FIBER REFINER

A center plate (10) for a rotor(6)in a pulp or fiber refiner (1) has a surface (200) provided with at least one feeding wing (100) for directing lignocellulose- containing material (7) flowing onto the surface (200) towards a periphery of the center plate(10). The at least one feeding wing (100) is an elongated protrusion arranged such that a second end (100b) of the feeding wing (100) is arranged further away from a center of the center plate (10) than a first end (100a) and is also displaced relative to the first end (100a)in a direction opposite to a direction of rotation (11) of the rotor(6) and center plate (10). The at least one feeding wing (100) is provided with at least one opening (101) allowing steam (8b) to flow through the opening or openings (101) in a direction having a component directed opposite to the direction of rotation (11)， when the center plate (10) is rotating in the direction of rotation (11). A center plate (10) for a rotor(6)in a pulp or fiber refiner (1) has a surface (200) provided with at least one feeding wing (100) for directing lignocellulose- containing material (7) flowing onto the surface (200) towards a periphery of the center plate(10). The at least one feeding wing (100) is an elongated protrusion arranged such that a second end (100b) of the feeding wing (100) is arranged further away from a center of the center plate (10) than a first end (100a) and is also displaced relative to the first end (100a)in a direction opposite to a direction of rotation (11) of the rotor(6) and center plate (10). The at least one feeding wing (100) is provided with at least one opening (101) allowing steam (8b) to flow through the opening or openings (101) in a direction having a component directed opposite to the direction of rotation (11)， when the center plate (10) is rotating in the direction of rotation (11).