A metal processing operation where impurities are removed and metals are purified.
Machine used to grind pulp between two discs. Refiners can operate at low consistency or at higher consistencies. At low consistencies the material is fed to the refiner using a pump. At higher consistency levels conveying devices are used. Other refiner types are used for breaking down wood chips into fibers.
A machine in which wood chips are broken down into fibres for pulp making
A mechanical device used to produce mechanical pulp between grooved metallic discs, of which the other or both are rotating.