Blade for a refiner for refining lignocellulosic material, and refiner comprising at least one blade

A blade for a refiner for refining lignocellulosic material, the blade being delimited by an inner periphery and an outer periphery and comprising:

• a blade surface with a refiner portion on which a plurality of refiner bars are arranged, wherein:
• each refiner bar extends from an outer bar end to an inner bar end, and
• the plurality of refiner bars are arranged so that a movement along a bar extension from an outer bar end to an inner bar end of a refiner bar is also a movement in a first circumferential direction;
• a dam that extends from an outer dam end to an inner dam end and connects at least three refiner bars, wherein the dam is arranged so that a movement along a dam extension from an outer dam end to an inner dam end is also a movement in the first circumferential direction;
• and
• a groove extending from the outer dam end to the inner dam end and adjacent to the dam on an outer side of the dam, said outer side being a side that faces the outer periphery.