Press Protection of Roller Mills

In order to keep the risk of roller surface damages as low as possible all foreign matters must be removed from the press feed (fresh feed and recirculating material). The feed material must pass below an electromagnet and a metal detector. The detector islinked to a by-pass gate. Metals which are not removed by the magnet will be detected by the metal detector and will by-pass the roller press. Some presses have in addition a screen between clinker storage and press feed bin for a first separation of large foreign matters and oversized feed.