Mill for crushing a bed of materials by compression

A mill for crushing (1) a bed of material by compression, comprising:

• a crushing roller (3);
• a horizontal-axis (A) cylinder (2) with two opposing ends and an interior wall, the interior wall being provided with a runway track for the crushing roller (3), placed inside said cylinder;
• driving means for driving the cylinder in rotation about the axis of the cylinder at a speed that spins the material outward;
• pressing means for pressing said crushing roller against the runway track of said cylinder;
• an inlet (7) for a supply of the material, situated at one of the two ends of the cylinder, and an outlet (8) for crushed material at the other of the two ends of said cylinder;
• and
• movement controlling means for controlling movement of the material so that the material travels over only a fraction of the length of the cylinder in each revolution and passes between the cylinder and the roller several times before reaching the outlet, said movement controlling means comprised of at least one scraper inside the cylinder, in a descending upper portion of the cylinder and configured to detach the material from the runway track, and a deflector plate under the scraper in such a way as to intercept material detached by the scraper and deviate the intercepted material toward the outlet,
• wherein the runway track is followed by a downstream lip, configured to oppose a flow of the material, the downstream lip located downstream of said crushing roller with respect to a direction of displacement of the material, said downstream lip comprising a plurality of elements (4) placed according to an interior perimeter of said cylinder (2).