US758655A - Magnetic ore-separator. - Google Patents

Description

PATBNTED MAY 3, 1904;

W. L. IMLAY. MAGNETIC ORE SBPAYRAIOR.

APPLICATION FILED OUT, 2, 1899.

N0 MODEL.

mums-sum 1 PATENTED MAY 3, 1904. W. L. IMLAY. MAGNETIC ORE SBPARATOR.

APPLICATION FILED OGTQZ, 1899. H0 MODEL. 3 SHEETSSHEET-2.

.30 MODEL.

N o.758,655.' p PATENTED'MAY 3,19%.

W. L. IMLAY.

MAGNETIC ORE SEPARATOR.

AiPLIOATIOFI'ILED OUT. 2, 1899. V 3 SHEETS-SHEET 3.

UNiiihii Si Ar ns BEST QQ PY Patented May 3, 1904.

i wniLn-m L. IMLAY, PHiLADELPHIA, PENNSYLVANIA, ASSIGNIOR --'ro 'AnoLm -I SEGAL, OF PHILADELPHIA, PENNSYLVANIA.

' mnenz'rlc oRE-sE PARA o SPECIFICATION forming part of LetterePa'tent No. 758,655, dated May 3, 1904..

I A'pplioation filed October. 2:, 1899. Serial No. '782Q8 i9. (lie model.)

To all whom it may concern:-

Be it known that I,WILLIAM L. IMLAY, aoitizen of the UnitedStates, residing in Philadelphia, Pennsylvania, have invented certain Ira- S provements' in 'Magnetic Ore-Separators, of

which the following is a specification.

My invention relates to. that class of magnetic ore-separators in which the inixtur'eqof ore or magnetic material and gangue or non-magnetic material, which fixture-is usually known as "stock, --is'br 'ght into prox imity to the surface of a revolving'drum .of

non-magnetic material having magnets disposed within the same, the action. of such magnets causing the separation from the'gangue of the particlesof ore which adhere to the surface of the drum and are carried around thereby until released from the attractive action of the internal magnets.

The main object of my invention isto sim-'. plify the construction and increase the separating'capacity of a machine of this character,

an object which I attain in the mannerhereinafter set forth, reference being bad to the ,2

accompanying drawings, in which Figure 1 1s a longitudinal sectional view of a. rgagnetic ore-separator constructed in accor ancewith my invention. Fig. 2 is a trans verse section of the same on the line a u, Flg. 1; andF1g.-3 1s a plan vlew, partly in section,

the section being on the line b b, Fig. 1.

The machine comprises a casing 1, having in the lower portion of the same an endless belt '2, which is mounted upon drums 3 and 4, shaft of one of said drums, preferably the drum 3, having power imparted thereto in any suitable manner, soas td causethe endless belt or apron 2 to travel in the direction of the arrow, Fig. 1.

Above the drum 3 is located the separatordrum 5, which is hollow and is composed of any suitable non-magnetic metal, the prefer- -able" "construction, of, this drum being that ShOWnqlD Fig.2, on reference to which it will be observed that the drum consists of a cylindrical shell secured to opposite bearish: each. ofwhiehhas atubular hubi'; which isfreeto turn' on a rod 8, mounted .in bearings 9, so

adjustment.

on one of the hollow hubs his a pulley 11,

which is driven by-means of a belt 12 from a pulley 13 on the shaft of the drum 4, asshown, for instance, by dotted lines in Fig. 1, or said pulley'inay be driven byother means, so as to rotate the drum 5 at a certain speed, as hereinafter set forth; l 4 a That portion of the rod 8 which is withinthe cylinder 5 is of-square or other polygonal form, and upon t'his portion of the red are mounted a series of eleetromagnets 1 5, as shown in Fig.2, each of these electromagnets consisting of a pair of segments 16, secured to or forming part of and projecting from a hub 17, which receives thefrod 8, suitable sleeves 8 being mountedupon the rod between the magnets and between the latter and theend of the drum, so as to maintain these parts in properlateral relation to each other. Segments 1%, of wood or other non-magnetic material, are fitted to the hubs 17 and till out the polarity throughout its entire periphei'a extent.

In the top of the casing 1 is a hopperl2il for receiving the stock from which the ore is .to be separated, this hopper having a contracted opening which delivers onto the upper run of the belt 2, and at one end of the casing isa chute 21 for receiving the ore discl1arged"t'rom the surface of the drum 5, the ganglia carried around the drum 3 by the belt 2 being deliv cred through an opening 22 in the table,.bench,

or other support-upon which the machine is -mounted Located betweeiiih'erlr'unifili-nd thewlhelt 2, ..as'closc'aspossible to the point'of contact botweorr them, is a bar-23."ofgnmgnetic metal,

which is rendered magnetic by induction from it can be turned therein, set-screws 10 the magnets in' the drum 5 and which serves to assist in efiectingthe separation oi the'ore from the gangue, the magnetic action of said bar having a tendency to draw the, magnetic particles to the surface of the stock as the lat ter, is carried beneath the bar, so that the said particles are in the best position for the action of the drum when they come under the influence of the same, the presence of the bar 23,

moreover, serving to render the actionof the magnets strongest in those portions which are nearest to the bar, and consequently to the M stockuponthebelt2 The operation of the machine will be fully understood on referenhe-to Fig. 1, the stock being carried along bythe belt 2 and being subjected first to the action of the inductionbar 23 and then to the action of therot'ating drum 5 the magnetic particles of ore being caused toadh'ere to the periphery of sai drum as soon as they come within the attractive power of the magnets 15 and the particles thus adheringto thedruin beiugcarried around in the direction of the arrow bythe latter until they pass beyond tiiniagtetic influence, whereupon they are discharged by centrifugal force from the surface 6f the drum and are received in the chute 21 by which they are di-' I rectedto an appropriate outlet.

One of the main features of my invention is that the segmental poles of'the magnets shall be of the same'sign'o'r polarity throughout their entire peripheral extent, as I findthat.

the release of themagnetic particles from the surface of the drum is then eflected almost immediatelyafter such particles pass beyond the hmit of the segmental poles of the-magnet, and

- I am thereby enabled to rotate the separatingdrum at higher speed than usual and to dispensewith the use of all cleaning-brushes, scrapers, or other devices for removing the adhering magnetic particles from the surface of the drum.

In'practice I prefer to rotate the drum 5 at such speed that the'centrifugal action tending to 'throwthe magnetic particles from the surface pflth'e drum shall be almost equal to the magnetic attraction, whereby they are caused to adhere thereto, whereby the centrifugal force will act to discharge the particles from the surfaceof the drum immediately upon the weakening of the magnetieiattraction, due to the carrying of the" particles beyondthelimit of the -segmental poles of "the magnets.

In the present instance I magnets employedislimmaterial, a'single magnet only being suflicient in some cases.

It will beobseryed on reference to Fig. 1

have shown a sei'ries of four magnets contained within the separator-drum; but it will be evident-that in carrying out py-invention the number of that the'square or polygonal portion of the rod- 8, upon which the magnets 15 are mountsauces; not occupy a position at the center i of the hub of each magnet, but is set back some little distance from said center, so as to bring theprepond'erance of metal in' the hub 17 of the magnet on that side-upon which the magnetic force is to be exerted, thus decreasing the resistance of the magnetic circuit of each magnet to the greatest possible extent.

Having thus described my invention, I claim and desire to secure by Letters Patent 1. .A" magnetic ore separating apparatus consisting of a rotating drum containing. a magnet, said magnethhaving ahub carry'ing" two sets of segments'forming a drum and wire consisting of a rotatingidrum with inteiznal u magnets, an endless belt below said drum for feeding the stock to the under side of the,

same, and'an' induction -bar outside of r the drum and above the upper surface of the belt on which the stool; is deposited whereby said bar acts upon the stock magnetically and without the interposition of any foreign body hefore said stock reaches thedrum, substantially as specified.

In testimony whereof I have signed my name scribing witnesses.

'to this specification in the presence of two sub- W. L. IMLAY.

Witnesses:

'Jos. H. KLEIN,

' FR NK- BnoH'roLn.

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