US832642A - Magnetic ore-separator. - Google Patents

Description

No. 832,642. PATENTED OCT. 9, 1906. H. H. WAIT.

MAGNETIC ORE SEPARATOR. APPLIOATION FILED MAR.20,1906.

2 SHEETS-SHEET 1.

MM? figs No. 832,642. PATBNTED OCT. 9, I906. H. H. WAIT.

MAGNETIC ORE .SEPARATOR.

2 SHEETSSHEET 2v APPLICATION FILED MAR 20 1905 UNITED STATES PATENT OFFICE.

SEPARATOR COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

MAGNETIC oRE-sEPAn 'roR.

Specification of 1.6mm Patent.

Patented Oct. 9, 1906,

To all whom it may-concern.-

7 Fig. 1. Fig. 3 is'a'sectional plan View. Fig.

- tions which Be it known that I, HENRY H. WAIT, a citizen of the United States, residing at Chicago, in the-county of Cook and State ot-Ilhnois, have invented a certain new and useful Improvement in Magnetic Ore-Separators, WhlCh the following is a full, clear, concise, and exact description.

My invention relates to a ma etic separator; and its object is to rovi e a simple, eflicient, and economical orm of machine which may be worked either with dry ore or in a liquid medium and in which the material to be treated will be subjected to the action of an intense magnetic field of considerable extent in such a manner that the magnetically-susceptible particles will be effectively re- 'moved and not entrained with the nonmagnetic material.

The invention further contemplates means for preventing non-magnetic material from being entrained and carried along with the magnetic articles.

I will escribe my invention particularly by reference to the accompanying drawings,

and the parts, improvements, or combina- In the drawings, Figure tional elevation of -'the' machine. F1 2 1s also-a vertical sectional elevation,' uti'is taken on a plane atright angles to that of 4 is adetailview-of a portion of the armaturesurface, showing teeth of a form es ecial-1y adapted to this'type of machine; an Fig. 5

is a detail sectional view showing another form of working surface for the armature designed to prevent non-magnetic particles upon a su from being-entrained by the magnetic particles adhering to the armature-surface. letters of reference designate the same parts wherever they are'shown.

. The machine is of a: general t separatin -cylinder .is'iarrange toqrevolve staritially 'vertical axis a magnetpole beingapplied to the face of the cylinder andzthe'material to be separated being fed into the air-gapbetween the magnet-pole and the ,cylinder, the magnetic particles being carried around in the rotation of said cylinder and discharged at a region circumferentially distant from the place of discharge of the non-magnetic material.

I regard as novel will be pointed out in the appended claims. V I

1, is a vertical sece in which a.

tion of the non-magnetic material from'being Referring to the drawings, 13' is the cylindrical armature mounted to rotate u on a vertical axis between the oles N of a powerful magnet M, the po eieces of said ma et being rovided' with eld-windings W to WhlO an electric current may be supplied from any suitable source. The armature B is laminated transversely to its axis of rotation in order to prevent eddy-currents and to permit it to turn in the intense magnetic fiel with a minimum expenditure of energy.

Troughs or hoppers C C are arranged to receive the materia to be concentrated and to direct the same between the magnet-poles N and S and the surface of the revolving armature, and the products are collected at the bottom in the discharge chutes D D, E E, and F F. It is intended that the magnetically-permeable particles shall be attracted to the surface of e armature B and adhere to said armature in its rotation until it reaches the neutral zone between the two opposin pole-pieces, where it will be released and wil all into the discharge-chutes F F. The armovements-first, the downward movement due to gravity; second, the inward move- "mentjtoward the surface of the armature un- Atil they: adhere thereto, and, third, the cir-;

cumferential movement "due to the rotation of the armature. To these may be added, fourth, the final release and falling down into the collecting-chute. The non-magnetic ma- It will be seen that or pro ections'upon which the terial, on the other hand, tends to fall directly down. Centrifugal force tends to keep the non-magnetic material thrown out and clear of the armature-drum.

In order to prevent any considerable porentrained with the magnetic material and carried around therewith in the rotation of the cylinder, the surface of the cylinder may be made smooth mechanically by filling the\ spaces between the teeth or projections with non-magnetic material. In Fig. 4, however, a form of tooth or proiection is illustrated which would be es ecial y advantageous, the

surfaces being inc ed at so steep an angle that .particles which are not positively held on by magnetic attraction wil find no places to lodge and will fall off. It will be noted that the teeth in Fig. 4 are in the form of pyramids pointing'ldownwardly and arranged so as to resent s arp edges to the falling material, t e pyramids being in staggered rows, so that the material cannot escape the lines of force concentratin upon the edges thereof.

In Fig-5 I have i lustrated the toothed surface provided with an uneven filling of nonmagnetic material forming inclined ledges which project slightly above and beyondthe points of the teeth or projections. In other words, the point of the tooth comes to the surface on that portion of the physical surface of the armature which slopes inward, or on the under side of the rojecting ledge of nonmagnetic material. adhering to the points of the teeth are thus shielded to a certain extent from the falling non-magnetic particles, to avoid collecting such non-magnetic particles above them. The sloping surface of the non-magnetic ledges are too steep to allow the material to rest thereon, but the magnetic particles are drawn toward the points of the teeth which come to the surface on the under sides of such ledges.

A considerable advantage results from the arrangement of the armature-cylinder between opposed pole-pieces of opposite olarity in that the magnetic attraction on t e armature is approximately balanced, and neutral points are established on the surface of the armature between the opposing oles, at which oints the attracted matena will be release and not carried clear around. By arranging the cylinder to rotate u on a vertical axis instead of horizontally bot the air-gaps between the cylinder and the magnet-poles may be utilized for the passage of material, so that none of the magnetizing force is wasted on the idle air-gap.

It will' be understood that the drawings herewith presented are more or less diagrammatic in character and that various modifications may be readily made by those skilled he magnetic particles in the art without departing from the constructionaldprinciples indicated.

Having escribed my invention, I claim as new, and desire to secure by Letters Patent, the following:

1. In a magnetic separator, the combination with a separating-armature built up of toothed laminae, the teeth of said laminae being arranged in vertical rows, of non-magnetic material in the space between said teeth, said material forming inclinedledges projlelcting above and beyond the ends of said teet 2. In a magnetic separator, a separatin element having an approximately vertica ore-carrying surface arranged to move laterally, and provided with permeable ma netic projections, and non-magnetic materia covering said surface and forming inclined led 'es upon said surface projectin above and eyond the ends of said permea le rojections.

3-. In a magnetic separator, t e combination with an ore-carrier revolving on a substantially vertical axis, said carrier being built up of transverse laminae, said laminae having teeth for causin convergences of magnetic flux at the peri Irery of the carrier, a non-magnetic filling etween 'said teeth, said material forming inclined ledges projecting above and beyond the ends of. said teeth, a magnet-pole facing said carrier, and means for feeding material to be separated between said pole and carrier. I

4. In a magnetic separator, a separating element having an approximately vertical ore-carrying surface arranged to move laterally, said surface having ermeable magnetic teeth or projections, an non-magnetic material filling the spaces between said teeth to form inclined ledges projecting above and beyond the ends of said teeth.

In witness whereof I hereunto subscribe my name this 13th day ofMarcli, A. D. 1905.

HENRY H. WAIT.

Witnesses:

IRVING MACDONALD, DE WITT C. TANNER.

Images