Valmet Technologies, Inc.

Valmet Technologies Oy

Anders Hawen

Petteri Vuorio

Christer Hedlund

Håkan Sjöström

Ville Ruola

Peter Bergqvist

Dino Muhic

A blade element () for a refiner for refining fibrous material comprises a refining surface () provided with blade bars () and blade grooves () there-between. The blade bars () have side walls ('&#x2033;) facing away from one another. The side walls (&#x2032;&#x2033;) of the at least one blade bar () comprise on both of its side walls (&#x2032;&#x2033;) steps (&#x2032;&#x2033;) which extend at least partly in the transversal direction relative to the side walls (&#x2032;&#x2033;) of the blade bar () and away from one another.

Blade element

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 ().

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Espoo, Finland

Anders Hawen