Metso Paper Inc.

Valmet Technologies, Inc.

Peter Bergqvist

Petteri Vuorio

Christer Hedlund

Håkan Sjöström

Ville Ruola

Anders Hawen

Dahn Lundell

Eric Hensley

Jeff Bowie

A blade element () for a conical portion () of a stator () of a refiner (). The blade element () has a feed end (), a discharge end (), and a refining surface () which has a feed zone () at the feed end () of the blade element (). The feed zone () of the blade element () has at least one guide groove () extending from the feed end () toward the discharge end () for guiding a flow of material to be refined from the feed end () toward the discharge end (). The depth of the guide groove () is arranged to change in a direction transverse in relation to the extending direction of the guide groove ().

Blade element

A refiner () comprising a stator () and a rotor (). The stator () and the rotor () comprise a flat portion () and a conical portion (). The conical portion has a first end () of smaller diameter (D) and a second end () of greater diameter (D) such that the first end is directed towards the flat portion and the second end is directed away from the flat portion. The refining surface () of the conical portion of the stator comprises at least an outer zone () arranged at the second end of the conical portion and an inner zone () arranged relative to the outer zone on the side of the first end of the conical portion. A portion of the length of the blade bars () in the outer zone are arranged relative to the rotation direction (RD) of the rotor such that they have a retentive effect on the material to be refined. Also a blade segment () for a conical portion of a stator of a refiner.

Refiner

Growing community of inventors

Helsinki, Finland

Peter Bergqvist