US999736A - Magnetic separator. - Google Patents

Description

E. S. BENNETT. MAGNETIC SBPABTORi APPLIUATION rum] Mn 2, 1910l Patented Aug. 8,1m.

UNITED STATES PATENT OFFICE.

ERASTUS S. BENNETT, OF NEW YORK, N. Y.

MAGNETIC SEPARATOR.

To all whom it may concern:

Be it known that I, EnAs'rUs S. BENNETT, citizen of the United States, residing at New York, N. Y., have invented certain new and useful Improvements in Magnetic Separators, of which the following is a specification.

My invention relates to magnetic separators, and it consists in thc features of conn struction and combination and arrangement of parts hereinafter described and particularly pointed out in the appended. claims.

In the accompanying drawings Figure 1 is a side elevation of a magnetic separator embodying my invention; Fig. 2 is a cross sectional view of Fig. 1.

In these drawings, l is a hollow shaft mounted in suitable bearings on the frame or tank 2, said Shaft carrying a coil magnet 3 which is inclosed by side plates 4, 5, bolted together at 6, and having inwardly entending flanges 7 with packing material at 8 l ing between said flanges and clamped tllereby to make a watertight joint. The

separator belt is shown at 9 moving in the direction of the arrows, and bearing upon particles to collect at this point.

the eriphery of the clamping plates 4 and 5. his belt carries off the magnetic particles which are held thereto by the action of the magnet, it being understood that the magnet is partly submerged in the water contained in the tank, which water has therein the materials to be separated. Suit- -able jets are provided at 10 to project the material against the lower side of the belt as it passes aroundV the magnets submerged in the water of the tank. While the strongest magnetic pull is on the face of the magnets between the flanges 7 there is also astrong magnetic field existing at the sides of the magnet, which euses the magnetic Further, the magnetic action on the separated material lying on the belt at the point where this belt leaves the magnets is such as to tend to hold the material at this point and to allow the belt to pass under the said material, and thus fail to remove and convey it to the point of delivery. Furthermore, there is more or less of the mateiial which drops or spills over the lateral edges of the belt, and the magnetic particles are attracted to the peripheral face of the magnets or the casingsinclosing the same, which face is exposed directl beneath the point where the belt leaves t e magnets, and this Specification of Letters Patent.

Application led May 2, 1910.

vacross the same and at regular intervals.

Patented Aug. 8, 1911.

serial No. 558,976.

material will thus collect on the face of the rotary magnetic body, so that it will be carried under the belt and around between the belt and the adjacent surface of the magnetic body, receiving constant additions from the material dropping over the edge of the belt. Again some of the dropping material will fall onto `the upper side of the return portion of the belt, and will thus collect between the belt and the face of the magnetic body. The belt also has a tendency to slip laterally, especially when wet, and if there is any considerable material between it and the face of the magnet. My present improvements are designed to remedy these conditions. For this purpose I provide on each side of the magnet body o a-'frame 11, this being shown as of substantially triangular form, but as to this I do not limit myself, the said frame carrying on its inner face a scroll-shaped blade or scraper 12 extending from near the centralshaft of the magnetic body gradually outward, and terminating at the point 13 adjacent and slightly above the plane of the belt near the point where the said belt leaves the magnetic body. These frames are held together by cross bolts 14, and they are secured to the frame of the tank by bolts 15 passing through slots to permit adjustment of the frames on the tank or the bearing plates 16 fixed thereto. These frames also support an apron 17 which extends beneath the upper art of the belt, and covers the portion of tlie magnetic body which wouldotherwise be exposed between the upper and low'er portions of ,the belt where they leave and return to the surface of the magnetic body. This apron has its side portions curving or inclining downward y from the vertical center line of the belt, so that any material falling from the beltvwill be deflected laterally and will be prevented from lodgin on the exposed periphery of the magnetic body between the upper and the lower portions of the belt.. This will prevent the collection of any of the magnet-ic particles between the face of the magnetic body and the belt.

In order to force theseparating material to leave the magnetic body and follow the movement of the belt, I provide ribs 1S on the outer face of the beltextending laterallyf I these ribs or projections are made of iron'- or magnetic material, they are made in sections of which the center piece is of4 non-magnectic material. `The lower or return portion of the belt is directed into proper relation with the peripheryy of the magnetic body by a wheel '19 suitably mounted in a bracket 20 supported on the tank or trame, the said wheel being deeply flanged at both sides to prevent lateral oisplacement of the belt. A jet of water or a brush may be employedl at 21 to clear the returnportion of the belt of any particles Vor material which otherwise would be carried by the belt back onto the periphery of the magnet, and get between the said magnet and the belt. The saidframes 11, together with the scroll 12, may be cast in one piece or made separately and fastened together, but in any case they should be of nonmagnetic material, as should also the cross bolts 14, the apron 17, and the hollow shaft, together with the supports 16 and, in fact, all parts excepting magnet. All of these parts being of nonmagnetic' material, the magnetic particles will be attracted by the magnet only.

The action of Athe scraper 12 will be readily understood, it serving to detach any magnetic particles from the lateral face of the magnetic body, and to crowd these particles upwardly to the point .where the upper ortion of the belt leaves the magnetic body.

o far as the relation of the particles to the lines of force is concerned, the said particles are, as it were, in the air, the scraper actin simply to crowd them tothe periphery an over onto the belt. That portion of the scroll scraper which extends, beyond the up er part of the belt and the ribs thereon is Bent slightly inwardly to deliver the particles scraped from the lateral face' of the magnetic body onto the belt as near the center thereof as practicable asishown in dotted lines at X, Fig. 2. f i

The tank may be of an amalgamating character, such as disclosed by me in previous patents, or any other vessel or sluice in which there are magnetic particles to be separated. The apron 17 may extend to a comparatively sharp ',edge at its central upper portion. The non-magnetic scroll need not actually touch the sides of the magnet, though set close thereto.

I do not limit myself tothe details of con struction above described.

I claim as my. invention 1. In combination in a magnetic ore separator, a. rotary magnetic body, means for removing the separated lparticles, and a scraper or the lateral face of the magnetic body, said scraper being in the form of a scroll extending from near the center of the side face outwardly toward the periphery of the magnetic body, substantially as described.

9.. In combination in a magnetic ore sepa# rator, a rotary magnetic body, a belt passing around the same and a scraper of scroll Vform extendin along the lateral face of themagnetic bofy and terminating adjacent the belt, substantially as described.

3. In combination En a magnetic ore separator, a rotaryymagnetic body, means for conveying the separated particles from said magnetic body, and a scraper adjacent the lateral face of the magnetlo body and terminating adjacent the conveying means and adapted to deliver the scraped pa. :ticles thereto, substantially as described.

4. In combination in a magnetic ore separator, a rotary magnetic body, a conveyer for removing the separated particles therefrom, and a scraper adjacent the lateral face of the magnetic body and having its end overlying the conveying means to deliver the material thereto, substantially `as described.

5. In combination in a may -etic ore separator, a rotary magnetic bo u. a belt passin around the same, and a Hector or shield Iextending over the expoed ortionl of the periphery of the magnetic b y between the outgoing and return portions of the belt, substantially as described.

6. In combination in a magnetic ore separator, a rotary magnetic bod a belt passing around the same, anda de ector or shiel extending over the exposed ortion of the periphery ofthe magnetic bo y between the out oing and return portions of the belt,

' sai shield or delector inclinin'g from a substantially central point laterally in both directions to deliver the material off to the side of the magnet-ic body, substantially as described.

In testimony whereof, l' allix my 'signature-in presence of two witnesses.

ERASTUS S. BENNETT.

Witnesses:

JOHN J. DAvIDsoN, MYRoN L. JUs'rrN.

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