US1072277A - Apparatus for the magnetic separation of ores and other material. - Google Patents

Description

G. ULLRIOH. APPARATUS FOR THE MAGNETIC SEPARATION OF ORES AND OTHER MATERIAL.

APPLIOATION FILED JAN. 17,1912.

1,072,277, Patented Sept. 2, 1913.

Z SHEETS-SHEET 1.

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G. ULLRICH.

APPARATUS FOR THE MAGNETIC SEPARATION OF ORES AND OTHER MATERIAL.

APPLICATION FILED JAN.17, 1912.

1072,27? Patented Sept. 2, 1913 F/(L 2 SHEETS-SHEET 2.

Af-romwexg GEORG ULLRICI-I, 0F MAGDEBURG, GERMANY.

APPARATUS FOR THE MAGNETIC SEPARATION OF ORES AND OTHER MATERIAL;

To all whom it may concern Be it known that I, Gnono ULLRIGH, a sib'ect of the King of Bavaria, and resident o vented certain new and useful Improvements in or Relating to Apparatus for the Magnetic Separation of Ores and other Material, of which the following is a specification.

This invention relates to apparatus for. the magnetic separation of ores and other material, and constitutes an improvement in or a modification of the apparatus described an adjacent magnet s in the specification of my prior application Serial No. 445852 filed July 29, 1908. In order to carry the se aration of the mate rial as far as ractica le with the apparatus referred to a ove it is necessary that the lines of force passin from one magnet to fiould pass through the rotating armature and flow therein without meeting unnecessary resistance. The dimensions of the armature in cross-section must be calculated accordingly and it has been found that in the above ty e of apparatus, the cross sectional area of the armature must be at least half as root as that of the magnet core. This ren ers the dimensions and the weight of the armature relatively large and therefore a correspondingly large mechanical effort is necessary for rotating the same. It has also been found in the above type of apparatus that highly magnetic material adheres firmly to the rotating armature even outside the magnetic field so that the carrying away of the magnetic material after separation is impeded.

The present invention has for its object to economize in the expenditure of mechanical efi'ort and to facilitate the carrying away of the magnetic material after separation.

According to this invention the magnetizable rings serving as the armature and counter-pole for the lower magnets instead of being rotatable are stationary and the carrying away of the separated magnetic mate rial is effected by a rotating member arranged between the arxnature rin s and the lower fixed magnets. The sai rotating member is mounted coaxiall with the rings and maybe axially adjusta le. Preferably the cross section of the rotating member is such that the contour thereof corresponds with the contour of the lower part of the armature rings.

One way of carrying the invention into Specification of Letters Patent.

agdeburg, v(Jlernaan Empire, have in-' Patented Sept. 2, 1913.

Application filed January 17, 1912. Serial No. 671,570.

magnets and the corresponding armature element in side elevation viewed in the direction indicated by the arrow in Fig. 2; the

armature element being however of modified form. F ig. 4 shows in vertical section a modified form of the apparatus and Fig. 5 a plan view of Fig. 4: partly in section on line A-B of Fig. 4 and with the rotatable arts turned 45 from their position in i .4.

plurality of magnets 1 provided with a common core are arranged in a circle around a stationary axis and carry pole pieces 2 each of which is energized by a coil 3. A central shaft 4 the axis of which coincides with the axis of the magnets is adapted to be rotated by suitable gearing such as that shown.

Double angled supports 5 are fixed .by their lower branches to the magnets 1 their upper branches carrying concentric magnetizable rings 6 which serve as the armature andcounter pole for the magnets 1 and can be adjusted axially by means of screws 7. This axial adjustment of the armature rings 6 can be effected independently of each other in the example shown. The cross sectional area of the armature rings 6 decreases toward the magnets l owing to its tapering formation.

Below the armature rings and between the latter and the magnets 1, a member 8 is provided which in the example illustrated is constituted by a corrugated disk. The member 8 which serves for carrying the separated magnetic material, is suspended c0- axially with the armature rings 6 on a disk lows: The material to be separated is delivered to the hopper 11 from which it passes through the conveyer channels 12 into the magnetic fields. ()n the passage of the material through the field gap of the several magnetic fields, the magnetic particles according to their permeability are separated into the zones formed by the several armature rings 6. The non-magnetic material passes along the conveyer channels 12, while the magnetic material adheres firmly to the lower face of the rotating member 8 andis thus carried outsidethe magnetic fields, whereupon it falls in the space between each pair of adjacent magnets 1. In order to eliminate any magnetic action of the armature rings 6 when passing over the said spaces and thus prevent the magnetic material'from being carried too far, the armature'rings 6 may be shaped as shown in Fig. 3vwherein they are provided with recesses 13 ofthe same width as that of'the space between two adjacent magnets.

The construction of the apparatus is not confined to the example described above and illustrated in Figs. 1, 2 and 3; on the contrary a large number of other constructions both for the apparatus as, a whole and for its several parts can be advantageously adopted. For example it is not absolutely necessary that the rotating carrying member 8 should be corrugated as it might be given the form of a plain disk. It is, however, advantageous forthe shape of 'the car rying member 8 to correspond to the contour of the lower parts of the armature rings 6. The number of the armature rings 6 depends upon the number of the materia s to be separated, and the adjustment of the said rings maybe such that several or all of them can be adjusted simultaneously. The arrangement and construction of, the carrying member 8 can also be modified in such a manner that it is adjustable in relation to each of the zones formed bythe armature rings 6, so that it can be adjusted independently of or simultaneously with respect to several of or (as shown) all of the zones.

. In place of continuous armature rings, separate 'ring elements can be employed in which case they are 'fixed over each of the lower fixed magnets to a common supporting member adjustable relatively to the magnets. This arrangement renders it pos sible to adjust the zone graduations'at the same time to difierent sizes in the several and 5. In a circle about a stationary axis,

are fixedly arranged a plurality of magnets b provided with a common core a, which are excited by a winding 0. The magnets 'possess each two superposed poles d and e. The upper poles (Z are provided with a plurality of magnetizable lamellae f, adjustable in the vertical direction through means of the screws 9 and arranged one behind the other in the direction of the introduction of the values, which lamellae are sharpened at their lower portions. By the adjustment of the -lamellae each of the individual ma netic fields can be subdivided into a plurality of Eones of different density. In the middle of the magnetic circuit is mounted an upright shaft 12., which can be set in rotation by any desired driving means. The shaft It carries on its upper end a cross arm a upon which is secured with vertical adjustment, an extracting body 7:, arranged between the superposed poles ,0l ande of the magnet b.

The annular extracting bod has a suitable wave-formed section, the imensions and division of the waves of which correspond to the lower portion of-the section of the ring-piece. For introducing the magnetic values, any desired delivering apparatus m will serve, which will direct the separating values beneath the extracting body is between the pairsof poles d and e through the field-gap; v

The mode of operation is as follows The separating values are conducted by the delivery apparatus m into the individual values and the further conducting of the magnetizable values take place.

The number of the plate-shaped bodies or lamellae 7 arranged upon the upper pole d, is determined in each instance, according to the number of the materials to be separated.

The adjustability of the lamellae f can be so' determined that several or all may be adjusted simultaneously.

Having thus described my invention, what 7 I claim as new therein and desire'to secure by Letters Patent is:

' 1. In a magnetlc separator, means for producing a plurality of magnetic fields in a circle about a vertical axis, each magnetic field two stationary poles of which the upper pole comprises lamellae adjustable vertically and independently of each other, said amellae being downwardly sharpened,

for the purpose of providing, in each magnetic field, a plurality of single adjustable zones and an extracting body revolving between said poles, said extracting body being corrugated to conform in shape with the sharpened part of said lamellee, and means for conveying the material to be separated between the upper and the lower poles.

2. In a magnetic separator, means for producing a plurality of magnetic fields in a circle about a vertical axis, in each magnetic field two stationary poles of which the upper pole comprises lamellee adjustable vertically and independently of each other, said lamellae being downwardly sharpened, for the purpose of providing, in each magnetic field, a plurality of single adjustable zones and an extracting body revolving between said poles, and means for conveying the material to be separated between the upper and the lower poles; said extracting body having an undulated radial section corresponding to the sharp pointed lamellae.

3. In a magnetic separator, a plurality of stationary lower poles arranged in a circle about a vertical axis, a plurality of non revoluble upper pole rings concentrically arranged about said axis above said lower poles, a common carrying frame for said pole rings, a revoluble extracting body he neath' said pole rings, said extracting body being corrugated to conform in shape with the sharpened. part of said lamellte; and means for conveying the material to be separated in between the poles; said pole rings being axially adjustable independent of each other and each being provided with a sharp downward edge. I

4. In a magnetic separator, a plurality of stationary lower poles arranged in a circle about a vertical axis, a plurality of non revoluble upper pole rings concentrically arranged about said axis above said lower poles, a common carrying frame for said pole rings, a revoluble extracting body heneath said pole rings; and means for conveying the material to be separated in between the poles, said pole rings axially ad 'iustable independent of each other and each being provided with a sharp downward edge, and recesses being formed on the under side of said extracting body between said rings.

In a magnetic separator, a plurality of stationary lower poles arranged in a circle about a vertical axis, an upper stationary pole above each of said lower poles, said upper pole comprising a plurality of magnetizablc plate-like elements sharpened donmwardly, said elements being vertically adjustable relative to each other and to said upper pole and being arranged one behind .vi the other in the direction of the introduction of the material to be separated; a common carrying member for said elements conduct ing the magnetic forces, a common extracting body revolving beneath all of said elements and means for conveying the material to be separated beneath said extracting body, said extracting body being corrugated to conform in shape with the sharpened part of said lamellac.

6. In a magnetic separator,relatively fixed upper and lower magnetic rings, vertical electromagnets having one ring for their yoke and the other ring for their armature, from the latter of which rings the ends of the cores of the magnets are separated by an air gap, the magnetic circuits being through adjacent cores and the two rings and across the gaps, conveyors ar 'anged in the gap to transfer the material to be separated between the axial portion of the rings and places exterior thereto, and a collecting apron rotatable in the gap and above the conveyer.

7. In a magnetic separator, a series of fixed vertical clectro-1nagncts arranged symmetrically about a common axis, an armature separated from the free ends of the cores by an air-gap, the armature and the said free ends of the cores forming opposing magnetic poles, one of which is provided with are shaped corrugations facing the other, conveyers arranged in the gap to transfer the material to be separated be tween the axial portion of the rings and places exterior thereto, and a collecting apron rotatable in the gap and above the conveyers, the apron having corrugations corresponding to the said arc shaped corru gations.

8. In a magnetic separator, means for establishing a substantially vertical flow of flux through an air gap, means for conveying material through such gap, and a corrugated apron movable at right angles to the conveyed material and having wedge-shaped ribs concentric with the axis of rotation of the apron.

t). In a magnetic separator, means for establishing a substantially vertical How of flux through an air gap, the upper pole of such gap having wedge-shaped concentric ribs, means for conveying material through the gap, and an annular corrugated apron movable at right angles to the conveyed material, the corrugations of the apron substantially fitting the ribs of the pole,

The foregoing specification signed at ll [agdeburg this 21st day of December, 1911.

GEO RG ULLRICH.

In presence (if-

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