US3438495A

US3438495A - Drum magnetic separators

Info

Publication number: US3438495A
Application number: US604931A
Authority: US
Inventors: Arthur George Turnock
Original assignee: Electromagnets Ltd
Current assignee: Electromagnets Ltd
Priority date: 1966-10-19
Filing date: 1966-12-27
Publication date: 1969-04-15
Anticipated expiration: 1986-04-15
Also published as: GB1193637A

Description

P 1969 A. a. TURNOCK 3,438,495

DRUM MAGNETIC SEPARATORS Filed Dec. 27, 1966 Sheet of 2.

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April 15,1969 A. e. TURNOCK 3,433,495

DRUM MAGNETIC SEPARATORS Filed Dec. 27, 1966 Sheet i of 2 United States Patent 3,438,495 DRUM MAGNETIC SEPARATORS Arthur George Turnock, Sutton Coldfield, England, as-

signor to Electromagnets Limited, Hockley, England, a corporation of the United Kingdom of Great Britain and Northern Ireland Filed Dec. 27, 1966, Ser. No. 604,931 Claims priority, application Great Britain, Oct. 19, 1966, 46,643/ 66 Int. Cl. B03c 1/02 US. Cl. 209219 Claims ABSTRACT OF THE DISCLOSURE A drum magnetic separator in which a rotatable drum and a magnet unit are mounted independently of one another and in which provision is made for adjusting the mounting of the magnetic unit or the rotatable drum to obtain the required clearance between these two elements.

This invention has reference to drum magnetic separators.

Drum magnetic separators as constructed heretofore are subject to the disadvantages that dilficulty is experienced in fitting the outer drum or shell over the magnet to obtain the required clearance between the magnet unit and the rotatable drum and that the conventional manner or construction renders maintenance somewhat ditficult either in the case of electrical servicing or mechanical damage to the drum.

The present invention has for its object to provide a drum magnetic separator which is of simplified construction, easy to assemble and not subject to the foregoing disadvantages.

Accordingly the invention consists of a drum magnetic separator in which the rotatable drum and the magnet unit are mounted independently of one another.

The invention also consists of a drum magnetic separator in which the rotatable drum and the magnet unit are mounted independently of one another and in which provision is made for adjusting the mounting of the magnetic unit or rotatable drum to obtain the required clearance between the magnet unit and the rotatable drum.

The invention further resides in a drum magnetic separator constructed substantially as will be described hereinafter.

A manner of carrying the invention into efiect will now be described with particular reference to the accompanying drawings wherein:

FIGURE 1 is a front elevation of a drum magnetic separator in accordance with the invention partly broken away for the sake of clearness,

FIGURE 2 is an end view of FIGURE 1,

FIGURE 3 is a fragmentary view of a modified form of drum for the drum separator illustrated in FIGURES 1 and 2, and

FIGURE 4 is a fragmentary view in longitudinal section and on an enlarged scale of yet another modification of the drum separator as illustrated in FIGURES l and 2.

In the drawings like numerals of reference indicate similar parts in the several views.

According to the manner of carrying the invention into effect as illustrated in FIGURES l and 2 the magnet unit which may be in the form of a battery of permanent magnets or of electromagnets of conventional construction is designated generically by the reference numeral and is supported by a base plate 101 having an upstanding section 102 incorporating a crank 103. This upstanding section 102 is turnably mounted on a longitudinal shaft 11 which constitutes the axis about which the drum separator is required to rotate the end portions 111 whereof are rotatably mounted in adjustable bearing blocks 12 carried by oppositely disposed composite fabricated end structures designated respectively 131 and 132. The upper end of the crank 103 is connected to the end of the ram 141 of a hydraulic ram and cylinder mechanism of known kind the cylinder 142 whereof is pivotally mounted to a vertical member 132a forming part of the fabricated end structure 132. The bearing blocks 12 co-operate with

screws

121 and 122 which respectively permit of the adjustment of the effective height of the bearing blocks 12 and of its longitudinal position on the bed 133 forming part of the respective end structures 131, 132 as and for a purpose which will be described hereinafter.

Adapted to be fitted around the magnet unit 10 and concentric with the shaft 11 is a cylindrical drum designated generically by the reference numeral 16 which conveniently and as illustrated is assembled from two similar

semi-cylindrical halves

161 and 162 provided with angle section plates 163 so that two

halves

161, 162 may be bolted together to constitute a cylindrical drum by means of bolts 163a as is clearly illustrated in FIGURES 1 and 2, and separated as may be required.

At each end the drum 16 is provided with flanged reinforcing rings 164 again formed in two parts with the drum 16 which are adapted to rest on flanged support wheels 18 mounted on axles 181 supported in bearings mounted on the framework of the end structures 131, 132.

The main framework 19 is itself mounted on wheels 191 adapted to run on a rail track 25 so that the complete drum separator can be moved into and out of position as required.

At one end the drum 16 is also provided with a gear ring 165 again formed in two parts the teeth whereof are adapted to mesh with the teeth of a pinion 20 mounted on the same axle 18 as the relevant flanged support wheel 18. The axle 181 also carries at the outer end a sprocket wheel 21 adapted to be driven by endless chain 22 from an electric motor 23 carried by a bed 231 adjustably mounted on end structure 132 so that the position of the bed 231 may be adjusted by means of screws 232 for compensating for any slackness in the driving chain 22 in a manner which will be well known to those skilled in the art.

Adapted to bear on the interior of the drum 16 conveniently adjacent to each end is a roller 24 carried by a forked bracket 241 the said bracket 241 co-operating with springs 243 so that the rollers 24 thrust on the inner periphery of the drum 16 and force the flanged reinforcing rings 164 into firm engagement with the respective support rollers 18.

The force exerted by the springs 243 may be adjusted by means of nuts 244.

The cylindrical drum 16 may be open at the ends or provided with end covers as may be preferred.

Conveniently the pole shoe 104 of the magnet unit 10 is given an arcuate formation as at as is clearly seen in FIGURE 2. I

The hydraulic ram 141 and cylinder 142 may be operated to swing the magnet unit 10 about bearings 12 and thereby adjust the angular position of the magnet unit within the drum 16. This adjustability enables the position of the magnetic field to be adjusted in order to adapt the separator to operate effectively in a wide variety of differing types of materials. v

As illustrated in FIGURE 3 the drum 16 is provided with external additives in the form of spikes 166 which become induced magnets when the separator is in use so that material to be separated has to follow devious paths between the said spikes 166 during a separating operation in a manner itself known.

not shown which serves to convey the material to be separated on to the periphery of the drum 16.

Moreover the invention permits the zones of maximum intensity produced by a magnet i.e. the spacesgbetween the pole shoes or plates to be more fully utilizedlhan in conventional known types of drum magnetic separators. For example as illustrated in FIGURE 4 the drum 16 is given a castellated formation as seen in longitudinal section and the pole shoes 105 are arranged and adjusted to have a Working fit Within the upstanding castel-- lations 168. Consequently if the matter to be separated is directed into the depressions 167 between adjacent castellations the matter would be subjected to magnetic force of the greatest intensity and thus make for the maximum possible ferrous extraction.

It will be appreciated that the drum magnetic separator as hereinbefore described is simple in construction and easier to manufacture and assemble than drum magnetic separators of conventional type, and ensures the concentric setting of the drum 16 relatively 'to the magnet unit as may be required.

Furthermorgthe drum magnetic separator of this invention facilitates cooling of the separator when in use as end covers may be dispensed with and furthermore; the construction facilitates servicing either for electrical.

or mechanical faults since by removing one half of the drum unobstructed access can be gained to the magnet unit as required.

I claim:

1. A drum magnetic separator comprising:

(a) a drum rotatable about the axis thereof,

(b) a magnet unit disposed within said drum,

(c) mounting means for mounting the magnet unit for pivotal movement about an axis which is parallel to the axis of the drum,

(d) saiddrum having castellations extending around the diameter thereof to define openings therebetween, and

(c) said magnet unit having magnet shoes engaged in said openings with a working fit.

2. A drum magnetic separator comprising:

(a) a drum rotatable about the axis thereof,

(b) a magnet unit disposed within said drum,

(c) mounting means for mounting the magnet unit for pivotal movement about an axis parallel to the axis of the drum, and in which said mounting means comprises a longitudinal shaft and bearing blocks therefor, and

f (d) adjustment means for adjusting the position of the mounting means and thereby adjusting the distance from the magnet unit to the drum.

3. A drum separator according to claim 2, in which said magnet mounting means comprises a longitudinal shaft and.bearingblocks therefor and said adjustment means comprises means for adjusting the height and lateral displacement of said bearing blocks.

' 4. A drum magnetic separator according to claim 2, comprising a ring gear mounted on the drum and a driving pinion meshing with the ring gear to drive the drum.

5. A drum magnetic separator according to claim 2 in which said drum has castellations extending around the diameter thereof to define openings there between and said magnet unit has magnet shoes engaged in said openings with a working fit.

References Cited UNITED STATES PATENTS 2,287,804 6/1942 Johnson 209212 X 2,785,801 3/1957 Laurila 209-223 2,854,137 9/1958 Grunel 210-223 X 2,945,590 7/1960 Stearns 209219 X FOREIGN PATENTS 711,991 6/1965 Canada.

16,643 1905 Great Britain. 483,748 4/ 1938 Great Britain. 938,810 10/ 1963 Great Britain.

OTHER REFERENCES Laurila (B), German Printed Application No. 1,076,- 051, February 1960, pp. 209-219.

TIM R. MILES, Primary Examiner.