US1310802A - manegold and g - Google Patents

Description

R. A. MANEGOLD AND G. H. FOBIAN.

MAGNETIC SEPARATOB. Y

APPLICATION FILED MAR. 30, I91?- 1,310,92. Patented July 22, 1919.

2 SHEETS-SHEET l.

Eni/hd WITNESSES: INVENTOR 0/ WWW af fl 2% 526m? ATTORNEYS R. A. MANEGOLD AND G. H. F OBIAN. MAGNETIC SEPARATOR.

APPLICATION FILED MAR. 30. 1917.

2 SHEE'i'S-SHEET 2.

INVENTOR M W/V/ TORNEY3 UNITED STATES PATENT oFrIoE.

I ROBERT A. MANEGOLD AND GEORGE H. FOIBIAN, OF MILWAUKEE, WISCONSIN, ASSIGNORS T0 DINGS MAGNETIC' SEPARATOR, COMPANY, OF MILWAUKEE,

wrsoonsm, A; CORPORATION or wrso'onsnv.

MAGNETIC SEPABATOR.

Application filed March- 30, 1917. Serial No. 158,586.

To all whom it may concern:

Be it known that we, ROBERT A. MANEGOLD and GEORGE H. FOBIAN, citizens of the United States, residing at the city of Mil waukee, county of Milwaukee, and State of Wisconsin, have invented new and useful Improvements in Magnetic Separators, of which the following is a specification.

Our invention relates to improvements in magnetic separators.

The object of our invention is to provide means for utilizing a non-magnetic carrierrotating substantially in a horizontal plane through a magnetic field of high intensity to convey magnetic material out of said field, and deposit it in a suitable hopper or'receiver, whereby material (including both magnetic and non-magnetic material) may be conveyed-into the magnetic field by any suitable conveyer, such, for example, as an endless belt or apron extending underneath said rotary carrier, and the magnetized material lifted from the apron or belt into con-- tact with said horizontally rotating carrier and held in contact therewith by magneticattraction, until conveyed by the carrier beyond the zone or field of magnetic influence, or to a point where the magnetic attraction is no longer sufiicient to retain the magnetite against the under side of such carrier.

We are aware of the fact that horizontally rotating conveyers, provided with pole pieces which become induction magnets by traversing the magnetic field, have heretofore been used to lift and convey magnetite from a traveling apron, or other form of conveyer, stationary magnets beinglocated above and below the conveyer, and arranged to establish a magnetic field traversed by the conveyer and by the induced magnets of the horizontally rotating carrier. But, our invention has for its object to provide a form of construction in which powerful stationary magnets, or their pole pieces, may. be brought into close proximity to the. apron, leaving a narrow gap between the upper and lower pole pieces through which the apron may magnetizable disk revolving in extremely close proximity to the lower surface of the upper pole piece, or pole pleces.

Specification of Letters Patent.

Patented July 22,1919.

thickness of which has been reduced to a minimum.

In the drawings Figure 1 is a side elevation of a magnetic separator, embodying our invention, with a portion of thehorizontally rotating carrier illustrated in section 'andfpart of the frame broken away.

Fig; 2 is an-end elevation, also showing a portion of the carrier in section, and a portion of one of' the receiving chutes in section.

Fig. 3 is a detail plan View of the horizontally rotating carrier on a reduced scale, showing the pole pieces of the upper magnet in horizontal section.

Like parts are identified by the same reference characters throughout the several views.

The material to be separated by removing the magnetizable portion, herein referred to as magnetite, is fed from ahopper l to the upper surface of the revolving apron 2,-

whereby the materialris conveyed by the apron in the direction indicated by the arrow in Fig. -1, the non-magnetic material being delivered at the rear end of the apron, where it' passes over a drum 3. The front end of the apron is supported by a similar drum 4'. Feeding mechanism in the hopper 1, of any desired type, maybe actuated from a shaft 6 of the drum 4, by means of a sprocket chain 8 operating over sprocket wheels 9 andlO. Theconveying portion (or upper horizontal portion), of the apron extends over a set of idle rollers 12, the shafts 13 of which are journaled in vertically adj ustable bearings 14, these bearings being adjusted by means of screws 15 to raise or lower the shafts and rollers 12, whereby that portion of the apron between the front and rear rollers 12 maybe accurately supported in the desired horizontal plane.

A stationary magnet 16 is provided with pole pieces 17 4 projecting downwardly from each end of the magnet into close proximlty to the apron 2, the lower ends of these'pole pieces being preferably provided with seg mental ribs 19.; These ribs are preferably V shaped in cross section, whereby the lines a of force may 'be concentrated along the edges 111g carrier annulus 25.

' The carrier is sup orted and actuated by a depending shaft 2 The centralportion comprises a disk 28 which may be suitably reinforced by ribs 29. *The annulus 25 is supported from the disk 28 by a thickened supporting annulus 30, and'the outer margin of the annulus 25 is provided with an upturned flange 31, preferably inclined outwardly, as shown. This flange 31 stifiens the annulus 25, which can be made very thin since it is subjected to but little strain.

It'will be observed that the annulus 25 is interposed between the ole pieces .17 and the working portion 0? the apron 2. The magnetite is lifted against the under surface of this annulus 25 while traversing the inagnetic field. The most powerful attraction, will, ofcourse, be exerted when the magnetite passes directly underneath the-V shaped segmental ribs 19. A. lu-

rality of ribs are preferably employs on each pole iece in order that the material may be su jected to more than one powerful magnetic pull while traversingthe magnetic field. The removal of the more strongly magnetic materials will be accomplished by the first magnetic pull, and this causes some agitation of the non-magnetic material which frequently, partiallyor wholly, covers the magnetite. The less magnetic material will be shifted so as to expose its more strongly magnetic portions to the action of the second rib 19. This shifting movement is caused in part'by the agitation above referred to while the material is subected to magnetic influence. Further agitation will also result on account of the raking efi'ect ofthe magnetite: which is traveling with theannulus 25, and the apron is made wide enough to permit the material to be thus dragged laterally without discharging the non-magnetic. material from the side margins of the apron. This, dragging effect, of course, tends to distribute the 'material, over a wider area upon the apron, thereby also more effectually exposngthe materlal to the action of the second rib 19. The material will be also subjected I not.

to further separation while passing underneath the rear pole piece 19, if the magnets are arranged, as illustrated in the drawings, since the apron passes underneath both pole pieces of the magnet16. I

The diameter ofthis-horizontally rotating carrier, composed of disk 28- annulus 25 'and its supporting portion 30, 1s greater than the width of the apron 2, and is suf- .ficient .to allow the annulus 25 to drop the magnetite beyond the side edges of the apron, while traversing the neutral zone.

The machine is driven from any su table source of power applied through a main driving pulley 35, this pulley beingmounted on overhead cross shaft 36, I suitably geared at 37 to the vertical shaft 27 which supports the horizontally rotating carrier 28-25. This shaft 27 preferably passes downwardly betwee'nthe winding spools 16 of the magnet 16, and it may have bearings in the bars 40 and 41 of the magnet frame. The magnet 16 may be adjustably' supported from overhead frame bars 43, by means of hanger screws'42. These screws allow the magnet 16 to be raised or lowered.

The apron 2 is driven from shaft 36 by 7 means of a belt'or chain 45 passing over pulleys or sprocket wheels 46 47 respectively. i

It will be observed that we have provided receiving chutes 50 having flaring upper ends to receive the magnetite dropped from the conveying annulus 25 while traversing the neutral zones between the respective pole pieces of the magnet 16. Thesechutes deliver the magnetite at the sides of the machine, or into any suitable "receiver, whereas the 'non-magnetizable material is discharged at the rear end of-the' apron 2, as above stated.

It will, of course, be understood that the annulus 25 is not only formed of non-magnetizable material, but that its supporting disk 28 will also be preferably formed of apron 2 and also the idle rollers 12 are nonmagnetizable, the lines of force bein there- .fore concentrated across the gap tween the pole pieces of the electro-magnet, and the pole pieces 24 of the induced magnet below the apron. It is not essential whether the magnet below the apron be wound or i If wound, the pole pieces must, of course, be of opposite polarity from the opposed polepieces above the apron.

7 We claim:- v

1'. magnetic separator, including'the combination with a main 'horizontally'disposed conveyer forthe material to be se arated, of a magnethaving segmental po l's pleces and a coiiperating inductor magnet arranged to' establish a magnetic field 15 to convey magnetizable material from the main conveyer while maintaining a magnetic gap of minimum dimensions and maximum intensity.

2. A structure as set forth in claim 1, in which the cross conveyer is also pro- 20 vided with a stiffening rib adjacent to the interior edge of the annularportion, and the outer Ilm being conically expanded to its upper margin.

In testimony whereof I aflix my signature 25 in the presence of two witnesses.

ROBERT A. MANEGOLD. GEORGE H. FOBIAN.

Witnesses:

EDGAR F. BRUCE, L. Sens.

Images