US1527070A - Magnetic centrifugal separator - Google Patents

Description

Feb. 17, 1925. I 1,527,070

0. B. PECK,JR

MAGNETIC CENTRIFUGAL SEPARATOR Filed 061;. 5, 1923 unwmum III/III I nnmmaa I I n IIIIII/IIII v INVENTOR Patented? Feb. 17, 1925.

UNITED STATES PATENT OFFICE.

ORRIN B. IPECK, JR., OF LOS ANGELES, CALIFORNIA.

-MAG1\TETIC CENTRIFUGAL SEPARATOR.

Application filed October 3, 1923. Serial No. 666,274.

Separators, of which the following is a specification.

My invention relates to separation or concentration of mixed solids while in a sufficiently crushed state, the component parts of which. are magnetic and non-magnetic, or are magnetic in dilferent' degrees of intensity, by subjecting such .materials simultaneously to the opposing energy of centrifugal force, and magnetic force, assisted by washing force of liquid, while the latter also forms a mobile medium, preferably under pressure, in which the substance under treatment may move between the separated strata of the respective component parts of the ma terial.

In the accompanying drawing, Fig. 1 is partly an outside elevation of my separator.

Fig. 2 is an enlarged fragmentary detail of the larger portion of the left hand side of Fig. 1, showing more clearly certain features.

Fig. 3 is a transverse plan section of the rotatmg parts of my separator, somewhat reduced in size, taken on line 33, of Fig. 1.

As means for carrying my invention herein described into effect, I provide a suitable central rotor or core 2, which is preferably conical in form, of desired suitable size to serve the purposes required. It may be of anystructure to form or carry suitable electric magnets and make up in association, coordination and operation with other parts of my apparatus, although I prefer this core to form in itself the integral or basic part of the magnet.

In forming this magnetic core, I prefer to employ a suitable steel element provided with annular channels or corrugations, as shown in the drawings. into which are wound or placed suitable coils 3. In this structure, the extended angular'integral ring parts 4, form the polls of the magnet.

- The-coils 3, are so connected as to form successively opposite poles of the extended integral ring parts, thereb creating magnetic gaps between these p0 es, in radial circumferential alignment with the magnetic coils.

I prefer thatthe magnetic core be rotatable and positioned vertically, being smallest at its upper or feed end, and that it gradually increases in diameter, as specially shown in Fig. 1, towards its discharge or lower end, so that the series of magnets of the core as well as magnetic gap 5, will progressively increase in diameter from the feed to the discharge end'of the core.

The core is preferably covered with a comparatively light, or thin metal shield 6, of non-magnetic material, such as copper, to protect the coils from the liquid and material under treatment. trated partly in section and partly in outside elevation in Figs. 1 and 2.

Surrounding the core is provided a rotatable conical-shaped vessel 7, preferably of shape circumferentially throughout a large part of its extent, to conform to the conical shape of the core, but sufiiciently larger in diameter so as to leave a separating channel or passage 8, between it and the exterior of.

the core, of size suitable to operate as desired in performance of the separator, being well within the effective magnetic field of the core.

The lower end of the vessel is provided with a head 9, having an extended central trunnion 10, by which the vessel is journalled and maintained in a suitable box 11, mounted on the bed plate 12 of the separator, as illustrated in Fig. 1. The upper end of the vessel is also provided with ahead 13, having an upwardly extended trunnion 14, which is journalled in box 15, carried on the upper end of a supporting bracket 16, which, in turn, is securely mounted on the bed plate 12 of the separator. The upper end of the trunnion 14 is provided with a pulley 17 through which rotation may be imparted to the vessel by a belt, not shown, from any suitable source of power.

The vessel has preferably two circumferential enlargements 18 and 19, respectively, as illustrated, near its lower or discharge end, in relative near proximity, suitably spaced apart, forming interior pockets or channels, from which radiate comparatively small discharge openings 20 and 21. These openings are in circumferential series, preferably in an integral part of the vessel, and are made of size and form to serve as discharge passages, while at the same time This shield is illus-' enabling retention of the required amount of liquid in the vessel to properly function in the process of separation.

Located circumferentially around the enlargements 18 and 19, are troughs or laun-' the lower end of the core in suitable position.

The upper end of the core is provided with an extended hollow trunnion 27 which passes up through and is journalled in the hollow of the trunnion 14 of the vessel. The trunnion 27 extends somewhat above the trunnion 14, and is provided with apulley 28, by which the core may be revolved with a belt, not shown, from a suitable source of power, so it will be seen that the core and vessel may be rotated independently or differentially by suitable application: of power for such purpose.

It will be understood that the magnet coils 3, may be connected in such manner as desired so long as they effect the purpose sought, although in Fig. 1 l have illustrated them as connected in pairs at the bottoms and tops of their windings, alternately, by wires 29 and 30, which will effect desired polarity of the magnets 4, as shown in the drawing. The terminal end wires 31 of these coils are carried to the central opening along the axis of the core and up near its upper end, where there are suitably located take-oifor slip ring 32 with which contact brushes 33 operate to supply electric energizing current from any suitable source, through the wires 34, for such purpose.

The current so supplied may be regulated in intensity and volume, and cut off from the coils as desired,'by any of the ordinary standard means, not shown, adapted to that pur ose.

T ere is providedon the up er end of the vessel a ring36, of suitable. s ape, as illustrated in Fig. 1 to form a feed channel adapted to receive material to be fed 01. flowed into the separating vessel for treatment. This material may be introduced through a pipe 37, and pass down through openings 38, in the upper end or head of the vessel, and into the separating passage 8, where it will be immediately acted on by the magnetic, centrifugal, and liquid washing forces in operation of the separator, and will pass on, forced by the vflow and scrub of the liquid, down through such passage, towards the discharge end, to. discharge out of the openings 20 and 21. v

As soon as the material enters the separatlng passage, those portions or constituents which are magnetic will be attracted by and to the core, against the opposing energy of centrifugal force engendered through rotation, the magnetic constituents at once assuming, against such opposing forces, a position in contact or along .close to the core, carrying with them however, in entanglement some materials which are nonmagnetic, or are very slightly magnetic, while the materials non-magnetic will largely be thrown outward by the centrifugal force and come in lodgment against the inner circumferential wall of the separating vessel.

The accretion of material in this manner flowing into the separating passage, .will fill and contract such passage sufiiciently so the flow of liquid, resultant to its volume and the frictional contact with the differentially rotating vessel and core, will create a sufliciently' strong washing or scouring action on the respective surfaces of these accretions to force the same along in their re spective positions, one largely 1n proximity to the circumference of the core, and the other against or in proximity. to the wall of the vessel towards the discharge end of the vessel and to'discharge through their respective openings 20 and 21 as has been above stated, to be caught in the launders 22 and 23.

It will be understood of course, that during operation the separating passage is maintained full of liquid, and is under liq uid pressure, resulting from conihieme nt while being acted upon by centrifugal force incident to its rotation.

As is especially illustrated in Fig. 2, the accretion of magnetic constituents passing through the separating passage will tend to form, and so far as permitted, will form quite definitely in bridges across the magnetic gaps with their terminals at the opposite poles of the respective magnets of the core, but the difierential rotation of the core and separating vessel will, as above stated, create a spirally inclined or helical washing current in the separating passage across the magnetic gaps, from the feed towards the discharge end of the core and vessel, which is indicated approximately by the arrows in Fig. 2.

The scrubbing wash of the flow as indicated by the arrows in Fig. 2, and as stated,

,will spirally cross the poles and magnetic gaps and in such flow will wholly or in art progressively dislodge and drag the ering magnetic material further down along "in the adhering magnetic bed to be thrown oil by the action of centrifugal force and -moved along in the channel on the surface of the vessel by the flow of the liquid.

When the magnetic material or constitu ents passing along in this manner has reached the lower end of the core, it will be crowded by such scrubbing force of liquid off from that end, assisted by the weight of a larger accumulation thereof which will form at this point, as indicated by the numeral 39 and will be discharged from the vessel through the opening 21, as has already been stated.

The conical, or outward inclination of the vessel and core from their feed towards their discharge end, is of material advantage in effecting movement along the core and Vessel to discharge as the vcentrifugal force tends to drive this material along its outwardly diverging course.

In operation, of course, it will be understood that whether it is desired to separate magnetic and non-magnetic material, or material relatively strongly and weakly magnetic, the relative intensity or strength of magnetic and centrifugal, as well as scrubbing force of'the liquid should be adjusted and coordinated to efiect the purpose, or in fact, to accomplish any separation which it is desired and possible in treatment of materials by this process. The respective s eed of the vessel and core, as well as the V0 ume of liquid fed into the separator being properly adjusted to that end.

What I regard as new and desire to secure by Letters Patent is:

1. In a magnetic centrifugal separator the combination of a rotatable electromagnet, a surrounding rotatable vessel with a separat ing channel between the vessel and the magnet, encircling the latter, adapted to hold liquid and means for rotating the vessel and magnet separately, substantially as described.

2. In a magnetic centrifugal separator the combination of a rotatable electromagnet, a surrounding rotatable vessel with a separating channel between the vessel and magnet, encircling the latter, adapted to hold liquid, material discharge openings from said vessel, adapted to discharge liquid during operation, while at the same time to maintain liquid under pressure in said channel, and means for separately revolving said vessel and magnet, substantially as described.

3. In a magnetic centrifugal separator the combination of an electromagnetlc core, having successive circumferential magnetic gaps on a horizontal plane, transverse to the axls, and enlarging diametrically towards the discharge end, a surrounding vesselwith a separating channel between the vessel and core, adapted to hold liquid within the effective field of the magnet, and provided with discharge holes in multiple circumferential series in relatively near proximity, and means for rotatin the core and vessel differehtially, substantially as described.

ORRIN B. PEOK, JR.

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