Patent ID: 6068133
Filing Date: 2000-05-30
Classification: B03C

Abstract:
A system for separating non-magnetizable metals from a mixture of solids, the system comprisinga conveying device for conveying the mixture of solids,a conveyor (3) including a continuous conveyor belt (3.2) having belt drums supported on a frame for transporting the mixture of solids, wherein a head drum (3.3) located on the supply end comprises a driven, eccentrically supported, adjustable magnet rotor (3.4) which deflects the components of the mixture of solids through alternating magnetic field generators onto different parabolic trajectories specific for the material, as well as a separating station (4) with separating elements (4.1, 4.2, 4.3) following the head drum (3.3), wherein the magnet rotor (3.4) is provided with rotational speed control (n var) which is controlled by a frequency converter, for accommodating the respective grain size to be separated and the material composition of the mixture of solids, wherein the magnetizing times are changed by varying the magnetic field, and wherein each of the separating elements (4.1, 4.2, 4.3) is disposed between two adjacent parabolic ejection trajectories of the separated fractions (1.1, 1.2, 1.3, 1.4) and is adjustable, whereina) preceding the conveying device, a feed device is provided, including a vibrating channel (2) including a dispersing section and an acceleration section having an additional slope (2.1) for uniformly distributing and settling the mixture of solids (1) on the conveyor belt (3.2) for protecting the conveyor belt,b) the conveyor (3) includes means for controlling the velocity (v var) of the conveyor, such as to adjust the ratio mass flow/throughput efficiency, the residence time of the mixture of solids (1) in the eddy current field of the magnet rotor (3.4) is controllable and the parabolic ejection trajectory of the respective constituent of the mixture of solids (1) is changeable,c) the magnet rotor (3.4) is constructed and adjustable such as to adapt the magnetic force to the release point of the respective constituent of the mixture of solids (1) over a range (.alpha. var) of .gtoreq.90.degree. such as to generate a variable repulsive force (F var) by an eddy current field for repelling the respective constituent of the mixture of solids away from the head drum (3.3) in a manner specific for that material.