GB462912A - Improvements in processes and apparatus for electro-magnetic separation of materials - Google Patents

Abstract

462,912. Magnetic separators. UNITED STATES STEEL CORPORATION. Sept. 17, 1935, No. 25816. Convention date, Sept. 22, 1934. [Class 72] In a method of separating materials, a suspension of the latter in a container is flowed under hydrostatic pressure through a transverse magnetic field, preferably produced by the rotating ends of magnetic poles, the magnetically attracted particles being moved progressively along the opposite sides of the container into channels of flow separate from the channel of flow of the main part of the suspension. The flow of the suspension may be divided into two streams flowing adjacent the wall of the container. In the apparatus shown, a fluid suspension of the material to be treated is fed by a shoot 26<1> into a container 16, provided with a water intake 26 and an overflow outlet 25 to give the desired hydrostatic head of fluid therein. The suspension is directed by baffles 27 towards a partition 8 which divides the suspension into two streams each of which passes into two passages formed between the lower parts of the partition 8 and the inwardy curved parts 7 of the container 16. In these passages the suspension is acted upon by a transverse magnetic field produced by rotating polepieces 13 which are energized by horizontal poles 1, 2, parts of which are enclosed by electromagnets 14. The magnetic material is attracted towards the parts 7, and the suspension carrying the same is directed into channels formed by internal partitions 4, 5 and passes away by pipes 17, 20. The suspension carrying the unattracted particles of the material passes between the partitions 4, 5, and is carried away by pipes 18, 19. To assist in the separation adjustably mounted pivoted gates 21, 22 are mounted so that their upper ends are close to the lower parts of the parts 7. The upper part of the container 16 may be divided into a series of channels by vertical fins, preferably mounted on the partition 8. The pipes 17, 18, 19, 20 may be provided with valves and also with washers having openings the size of which is so selected that the openings will not be clogged up. Two or three sets of rotating pole ends actuated by two or three sets of poles energized by two electromagnets 14 may be provided, a separate container being provided for each set of rotating poles.