Abstract: The invention relates to a method for refining cellulose fibers in aqueous suspension, using a plurality of refiner fillings having refining edges, of which one is operated on at least one stator and another is operated on at least one rotor, and the suspension to be refined is processed between the two refiner fillings. A partial flow of the suspension delivered to the outlet side flows back on the back side of the refiner filling on the stator side, and then flows through openings located between the refining edges of the refiner filling on the stator side, and again into the refining zone. This leads to particularly uniform and economical refining.

Abstract: A process for producing a fitting for the mechanical processing of aqueous fiber stock and a fitting made by the process. The fitting includes at least one base body and at least one processing element. The process includes producing at least one hard material body which forms at least a portion of the at least one processing element, and penetrating the at least one hard material body with a binder and permanently bonding the at least one hard material body and the binder.