Apparatus and method for comminuting of material

An apparatus for comminuting of material, the apparatus comprising:

• a first conveyor structure with a first conveyor surface, and a second conveyor structure with a second conveyor surface,
• the first conveyor surface and the second conveyor surface facing each other and being arranged to define a comminuting space,
• the conveyor surfaces being configured to move in a movement direction from a first end of the conveyor structures towards a second end of the conveyor structures, and
• the conveyor surfaces converging so that a gap between the conveyor surfaces narrows in the movement direction so that the advancing movement of the conveyor surfaces is arranged to bring about compression on the material comminuted,
• wherein the conveyor surfaces are double-converging so that the gap between the conveyor surfaces is also narrowing in a transverse direction that is transverse to the movement direction, said comminuting space thus also being double-converging,
• wherein the conveyor surfaces, in movement, are arranged to comminute one or more material particles comprised by the material in order to form one of more daughter particles from the material particle, and
• wherein the conveyor surfaces convergent in the transverse direction to the movement are arranged lower in the comminuting space for stopping fall of the daughter particles formed in the comminuting space, for focusing movement of the daughter particles in the movement direction on the conveyor surfaces, and
• wherein, while the movement direction of the conveyor surfaces is horizontal, daughter particles, one or more subparticles of the daughter particles, or even smaller material particles, are stopped from vertical falling movement by conveyor surfaces.