Patent GB-768451-A (GB)
Title: Method of and means for magnetically separating solid magnetic particles from a fluid current
IPC: B03C1/032
Filed: 1954-03-22
Abstract: 768,451. Magnetic separators. JONES, G. H. June 15, 1955 [March 22, 1954], No. 8373/54. Class 117 Apparatus for separating solid magnetic particles from a fluid current in which they are suspended comprises two pairs of electromagnet units 12 each having a separator unit 23 located between its core members. Each separator unit comprises a rectangular box-like member open at the top and bottom, and having walls 55, which are adjacent the poles of t h e electromagnet cores, forming the magnetic poles of the separator; the upper wall portions 56 and the two other portions 57 are of non-magnetic material, e.g. brass. The unit includes a plurality of plates 58 grooved at 61 and constituting auxiliary pole members which may be separated by non-magnetic flanged or U-shaped spacing members (Figs. 15, 16, not shown). Alternatively, if alternate pole plates have plain surfaces, the spacing members may be dispensed with. The grooves may be arranged obliquely, they may intersect one another, or they may be curved. Fluid control units 22 are mounted on a frame 20 pivoted to a table 10, and each includes chambers 24. 25 having ports controlled by valves 26, 27, 28 and cams 29, 30, 31 such that magnetic - particle - carrying fluid, washing fluid and scouring fluid are admitted in timed sequence to the separator unit 23. The magnetic-particle-carrying fluid is supplied to chamber 24 by a pipe line 35, surplus fluid being returned to the supply source by pipe 36. Washing and scouring fluid passes into chamber 25 from a common supply source via piping 38, the fluid being admitted as washing fluid through a port 39 and as scouring fluid through port 40. After flow of the magnetic-particle-carrying fluid has been arrested by closing of the valve 26 the washing fluid removes any non-magnetic particles adhering to the magnetic particles held in the separator unit and passes out therefrom. The magnets are then de-energized and the scouring fluid passes through the unit to remove the magnetic particles. The fluid from which the magnetic particles have been removed, the washing fluid and the scouring fluid are discharged through a funnel 46 and are separated into compartments of a trough 51 by a plate 45, the pivoting of which is timed by a cam 42 actuating the plate by a tappet 43 and levers 44, 44a. In a modification (Figs. 7, 8, not shown), a nozzle set at an angle to the vertical is rotated in timed relation to the flow of the fluids through the separator, the fluids being delivered separately to appropriate collecting compartments. Figs. 11-13 show magnet cores or pole pieces which act as separator units, each comprising two- or more core units 90, 91, 92 spaced and bored to permit flow of fluid which, in the Fig. 12 construction, is delivered through external piping 102 and in the other two constructions, to passages 95. Permanent magnets may be used in place of the electromagnets and the valves may be operated by hydraulic means. The frame 20 (Fig. 1) may be raised, for inspection of the plates 58, by a hydraulic jack 52.