US821615A - Magnetic separator. - Google Patents

Description

PATENTED MAY 29, 1906.-

M. DINGS. MAGNETIC SEPARATOR. APPLIOATLON FILED SEPT. 1'5, 1904.

2 SH-BETBBEBET 2.

A TTORN E Y! UNITED STATES PATENT OFFICE.

MYRON DINGS, OF MILWAUKEE, WISCQNSIN. MAGNETIG SEPARATOR Specification of Letters Patent.

Patented May 29, 1906.

Application filed September 15, 1904 Serial No. 224,619.

.To all whom it may concern.-

. Be it known that I, MYRON Dmes, a citizen of the United States, residing at Milwaukee, county of Milwaukee, and State of Wisconsin, have invented new and useful Improvements in Magnetic Separators, of which the following isa specification.

My invention relates to improvements in magnetic separators.

The ob ects of my invention are, first, to provide means for passing the material directly through a magnetic field and subjecting the material to a magnetic pull of increasing intensity during its passage, the material being retarded during its passage in order to facilitate its magnetization; second, to provide for the removal of the magnetized material by an air-brush of sufficient strength to overcome the residual magnetism; third,-

to provide a balanced carrier capable of being i 3. 5 is a plan view of the distributingcone.

Like parts are identifiedby the same reference characters throughout the several views;

A vertical non-magnetic shaft 1 is rovided with radial non-magnetic arms 2, w 'ch support a rin carrier '3, made up of a series of magnetiza le segments a, separated by nonmagnetic material b. The shaft is driven from any suitable source of power through a driving-shaft c and gears d and e.

the shaft 1 and are provided with upper olepieces 6, which have curved margins t ick ened vertically at 7 to diminish the magnetic resistance of the air-gap-betwlaen the olar ,The lower pole-pieces ,8 are similarly formed,-

margins 7 and the ring carrier 3, whic revolves in close proximity to these margins.

The pole-pieces 6 of the several magnets may;

consist of a single plate of metal having a ce; n'

.tralaperture for the shaft-1 and extending outwardly therefrom in the form of radiallywidened wings over therespective-"magnets.-

4 Electro- Y magnets are located symmetrically around but extend outwardly farther from the shaft and are provided with upwardly-projecting marginal flanges 9, the upper edges of which are so located that the magnetic circuit between them and the polar margins. 7 of the upper pole-piece will extend through the interposed segments of the ring carrier 3.

The material is fed from a hopper 10 to a distributing-cone 11, and the latter is pro vided with flanges 12, whereby the material is confined to those portions of the cone which cover the P016". ieces -6. inwardly-inclined non-magnetic eflecting-shields 13 receive the material from the cone and direct it through the magnetic field between the ring 7 carrier 3 and the upper edges of the respective marginal flanges 9 bf the lower polepieces' into the segmental chutes 15. The latter extend downwardly and discharge the nonmagnetic material into suitable receptacles 16, these chutes being preferably tapered and extended through holes in the lower polepieces 8. The magnetite or magnetizable material is taken up by the ring carrier 3,

which conv s it in a circular path out of the magnetic fie (1 when the segments of the carrier become denergized successively and deposit the magnetite in chutes 18 between the pole-pieces of one magnet and those of another.

The chutes 18 are provided with flanges 19,- which extend upwardly in close proximity to the ring carrier 3, and an air-current through this narrow space serves to detach the magnetite from the ring if held thereto by residual magnetism. This current may beproduced by a suction-fan 21, which draws the air from a receiving-box 22, into which the chutes 18 discharge. The box is provided with a slide 23, covering an aperture in its bottom, so that bywithdrawing the slide the contents of the box 22'may be discharged from time to time into a chamber 25.

Referring to Fig. 1, it will be seen that the ring 3'- is provided with a series of amiular ribs 27 .,on' its outer surface, .the upper rib having the largest diameter and the others being successively smaller in diameter, .thus formingmagnetic zones in the gap through which the material passes. The deflectingshields 13 are preferably formed with counterpart ribs 28, so that the surface of the shield alternately approaches and recedes from the surface of the ring 3 and each of the ribs 28 below the top "one is located nearer to the opposin rib 27 i on the ring than .the one above it.

he ribs 28 are preferably ,ar-

ranged in the form of steps which successively bring the' material into closer proximity to the ring 3. With this arrangement the strongly magnetic material is withdrawn by the upper ribs of the ring, thus giving the material of slight magnetic susceptibility the strongest field and greatest freedom from entanglement. The step form of the shield v13 retards the material between the ribs sufficiently to overcome the magnetic lag and permits the material to accumulate between the ribs, and this also retards the flow of the material passing over it with better re sults than can be secured where the material slides along a smooth metallic surface. I

In the drawings I have shown but two electromagnets. The desirable number depends upon the size of the'machine. In any case they should be disposed symmetrically around the shaft-axis to balance the magnetic pull.

It will be observed that the deflectingshields 13 are connected with a suitable wall or frame-piece by bars 31, which are bolted to the frame-piece. The bars 31 are offset at their upper ends and are connected with adjusting-screws, to which they are secured by.

' suitable nuts, as shown, whereby theshield may be raised or lowered into greater or less proximity to the carrier.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a magnetic separator, the combination of a rotary magnetizable carrier; oppos ing segmental pieces disposed in sets with pieces of opposite polarity in each set on opposite sides of the carrier, and said sets being symmetrically arranged with reference to the carrier to balance the magnetic pull thereon; segmental non-magnetic shields extending between the carrier and one pole-piece 'of each set, and means for distributing material to said shields.

2. In a magnetic separator, the combination of an upwardly-extending driving-shaft; a non-magnetic support mounted to rotate with said shaft; a magnetizable ring connected with said support; a set of magnets, arranged with cores parallel to the shaft at a less radius than that of said ring; segmental upper pole-pieces symmetrically balanced,

and extending outwardly into close proximity to the inner faces of said ring; segmental lower pole-pieces of opposite polarity extendmg outwardly and upwardly into proximity to the outer faces of said ring; inclined nonmagnetic shields extending downwardly and inwardlybetween said pole-pieces; and chutes extending from the lower ends of the shields downwardly through suitable apertures in the lower ole-pieces.

3. n a magnetic separator, the combination of an upwardly-extending driving-shaft;

a non-magnetic support mounted to'rotate with said shaft; a 'magnetizable ring con nected with said support; a'set of magnets, arranged with cores parallel to the shaft at a less radius than that of said ring; segmental upper pole-pieces symmetrically balanced and extending outwardly into close proximity to the inner faces of said ring; segmental lower pole-pieces of opposite polarity extending outwardly and upwardly in proximity to the outer faces of said ring; inclined nonmagnetic shields extendingdownwardly and inwardlybetween said pole-pieces; and chutes extending from the lower ends of theshields downwardly through suitable apertures in the lower pole-pieces; the opposing faces of said shield and ring being provided with ribs having opposing edges in closeproximity, whereby magnetic zones of alternating greater and less intensity are produced.

4. In a magnetic separator, the combination .of opposing segmental pole-pieces; a magnetizable carrier-ring arranged to travel between the pole-pieces; and a shield extending downwardly and inwardly between said ring and one of the pole-pieces; the opposing faces of the shield and ring being ribbed and arranged to approachand recede in zones parallel to that of ring rotation,- whereby narrow magnetic zones of great intensity are provided with minimum liability of cloggin 5. In a magnetic separator, the com ination of opposing segmental pole-pieces; a magnetizable carrier arranged to travel between the pole-pieces, and provided with a downwardly and inwardly receding series of 'annularribs; a segmental shield arranged to extenddownwardly and inwardly between the carrier and one of the pole-pieces, and

adapted to convey material along the under surfaces of the overhanging carrier-ribs.

6. In a magnetic separator, the combination of op osing segmental pole-pieces; a magnetizab e carrier 'arrangedto travel between the poleieces, and provided with a downwardly an inwardly receding series of annular ribs; a segmental shield arranged to extend downwardly and inwardly between the carrier and one of the pole-pieces, and adapted to convey material along the under surfaces of the overhanging carrier-ribs, said shield being supported by'vertically-adjustable hangers.

7. In a magnetic separator, thecombination of an upwardly-extending shaft; a carrier supported to rotatetherewith, and provided with anannular series of 'magnetizable segments; magnets arranged with their axes extending parallel to the shaft and provided with stationary segmental pole-pieces extended to opposite sides of the path of said segments, and with pieces of like polarity extended in opposite directions; a segmental cone arranged above the magnets and with its apex above the shaft and adapted to deliver material into the magnetic zones formed by said pole-pieces said pole-pieces being symmetrically arranged with reference to the shaft, whereby the magnetic pull upon said ring is balanced.

8. In a magnetic separator, the combination of a rotary magnetizable carrier; opposing segmental magnetic polepieces disposed in sets, with pieces of opposite polarity in each set'on opposite sides of the carrier and symmetrically arranged in reference to the carrier to balance the magnetic pull thereon; segmental non-magnetic shields extending between the carrier and one pole-piece of each set; and; means for distributing matter to 15 (1 said shields; intermediate shie s between the sets of pole-pieces disposed along and adjacent to the outer face of the carrier; and chutes composed of annular walls extending downwardly from said shields and subdivided se mentally, arranger? to lead downwardly through the lower pole-pieces, and other of said chutes being arranged to lead downwardly between the pole-pieces and a suction-chamber connected with the lower ends of said last-mentioned chutes.

In testimony whereof I affix my signature in the presence of two witnesses.

. MYRON DINGS. Witnesses:

LEVERETT 0. WHEELER, LYMAN G. WHEELER.

some of said chutes being,

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