The impeller iron-removing feeder produced by RICHI adopts variable frequency speed regulation to feed, so that the feed grinder is always in full load working state, the feed inlet is set offset, and the cylinder body can automatically withdraw when encountering hard materials to avoid damage to the rotor or cause hold-up . The discharging port is equipped with an iron removing device to feed evenly, maximizing the efficiency of the crusher and extending the service life of the hammer and screen.