US2685967A - Magnetic ore separator - Google Patents

Description

Aug. 10, 1954 J. H. JOHNSTONE 2,535,967

MAGNETIC ORE SEPARATOR Filed May 25, 1955 v v 2 Sheets-Sheet 1 L LL HH James HQ Job ns/one IN V EN TOR.

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g- 10, 1954 J. H. JOHNSTONE MAGNETIC ORE SEPARATOR 2 Sheets-Sheet 2 Filed May 25, 1953 James H. Jbhns/one INVENTOR.

BY W Patented Aug. 10, 1954 UNITED STATES PATENT OFFICE 1 Claim.

The present invention relates to a magnetic separating apparatus that is designed to separate non-magnetic ore bearing materials from magnetic ore bearing materials and is more particularly constructed to provide a magnetic ore separator for separating the rare metals such as gold and platinum and the like from granular material containing both magnetic and nonmagnetic ores.

At present, in Working rare metal bearing ore beach sands, the sands continually shift and no economically efficient ore separation apparatus is available which is portable, whereby it can be moved from place to place in accordance with the shifting sands.

Accordingly, the primary object of the present invention is to provide a magnetic ore separator of light weight and separable construction which is easily transported and set up for operation.

Another very important object of the present invention is to provide a magnetic ore separator wherein a unique magnetic pulley is provided which utilizes permanentmagnets necessitating no electrical connections and substantially reducing the weight of the pulley over any comparable prior art device.

A still further object of the invention is the provision of a magnetic ore separating apparatus, including a main supporting frame and an auxiliary frame carrying the magnetic pulley which is removably andadjustably mounted on the main supporting frame whereby the tension, elevation and length of the runs on the separator conveyor belt may be varied to meet the needs and desires of the operator of the apparatus.

These, together with various ancillary objects and features which will later become apparent as the following description proceeds, are attained by the present invention, a preferred embodiment of which is shown by way of example only in the accompanying drawings wherein:

Figure 1 is a top elevational view of the magnetic separator constituting the present invention;

Figure 2 is a side elevational view of the invention with parts being shown in cross section for clarity of detail;

Figure 3 is a sectional view of the invention taken substantially along the plane of section line 33 of Figure 2;

Figure 4 is a cross sectional view of the magnetic pulley of the present invention taken substantially along section line 4-4 of Figure 1; and

Figure 5 is a cross sectional view of the pulley taken substantially along section line 55 of Figure 4.

Referring now to the accompanying drawings in detail wherein like reference numerals are utilized to designate similar parts throughout the various views, the magnetic separating apparatus constituting the present invention is designated in its entirety by the numeral Ill.

The apparatus is of extremely light weight construction and is designed primarily for following rich ore veins which are not permanent enough or present in a sufiicient amount to warrant the construction of a. permanent separating plant for their processing from the beach sands.

Referring more particularly to Figures 1-3' of the drawings, the construction of the separating apparatus will be most clearly observed. The apparatus comprises generally a main frame l2 of substantially rectangular configuration and including legs l4 and It at the ends thereof respectively. The legs I i and are arranged in pairs with each pair of legs being connected at their upper ends to one another by the cross beams or braces l8 and 20 and at their lower ends by the cross braces 22 and 25 respectively. Thus, each end section constitutes a rectangular frame as designated by the legs i l, and cross beams 18 and 22 or their opposite end members designated by the numerals i5, 29 and 24.

Mounted on top of the ends of the sections and extending therebetween are a pair of parallel,

longitudinally extending beams 26 which form the top of the main supporting frame I2. As will be noted particularly from Figures 2 and 3, the beams 26 are mounted on top of the cross braces l8 and 20 of the end sections whereby they in effect form guide tracks for a purpose that will subsequently appear.

The forward'ends 28 of the beam extend beyond the cross beam l8 and have transversely aligned bearings or pillow blocks 36 mounted thereon. A drive shaft 32 is journalled in the bearings 36 and is connected at one end to a suitable power source (not shown). Centrally on the drive shaft 32 is secured a drive pulley 34.

Removably mounted between the longitudinal beams 26 is an auxiliary frame designated in its entirety by the numeral 36. The auxiliary frame constitutes a pair of transversely spaced, parallel, longitudinally extending main frame members 38 interconnected at their ends to one another by cross frame members 40 and 42 respectively.

The side or main frame members 38 of the auxiliary frame 36 are spaced apart from one relation to one another. retained in such relation by a suitable plastic closes t e s ets l2 .Withinthe ma n ieip l another a distance less than the longitudinal beams 26 are spaced apart from one another so that the auxiliary frame 36 may slide between the longitudinal beams 26. Intermediate the ends of the side frame member 38 are mounted bearing blocks 44 within which the ends of driven shaft 45 extending between the members 38 are journalled. Centrally on the driven shaft 46 is mounted the magnetic pulley 48. Additional bearing blocks 51! are mounted adjacenti theforward ends of the frame members 6-8 andidler shaft 52 extending between the members 38 has its ends journalled in the bearing blocks 50. Idler pulley 54 is mounted on the idler shait 52.

As will be noted from the drawings, the rearward end of the auxiliary frame 36=rests=directly upon the cross beam 26. Thetforwardelld of the frame 25 includes a supporting bar or strap 56 which is secured to the cross memberL-M thy means of the vertically'projecting fastener 58.

IIfhe ends. of the'bar 5,6 rest.=on;the-t9p of the beams 25 to support the front end of theauxiliary .frame 376 on the supporting frame 12. Bysuitably adjustin th fast er 8, th f ward nd of the-fr m 3.5 may he a sedendl we d- At the rearward ends, theside frame members 38 ;of the auxiliaryframe 33:.a11eprovided ,Wlth downturned end flanges 6E3. hdjustingscigewsfl extend through these endflangesfifi and abut the cross beam 2;; whereby the auxiliary-frame 8 may be moved forwardandmearwardly.

Endlessconveyor belt 64 is entrainedqver the p ll ys 3 ,..3t an fil h l sth and el ation of t upp r ungof the te maybe centrelled by suitable adjustmenton the fasteners .58 and l '52 on the auxiliary frame 36.

.The ma net c pu y 4B is .e mp sed essentially of a pair of semiecircular sections 66 of non-magnetic material joinedto one another by suitable fastening means (SE-as shown in Figure ,4 to form a wheel. Discs having a radius somewhat greater than the tradius of ,the wheel formed by the sections fifi are providedas side plates whereby a circumferential channel is provided around the rim of the wheel. A ;plu-

rali y of permanent block ma n ts-1: aredi n d within the channelin circumferentiallyspaced Th imaan t 1 are filler such asplaster of,Parisorthe lilge. A b and of aluminum e or other suitablep lon ,agnetic m r al fo ms a c ver f .th leh nnelandea ley 48. It is understood thatzthamaterials uti ed 7 vpulley2918;;the;rear metal bearing portions of the sand will-not be affected by the magnetic field set up by the magnetic pulley 48 and will fall into a suitable receptacle 82 as that portion of the conve qrlbelt 64 passes the point at which a freely falling body would be released therefrom.

'"fEhe magnetic ore bearing particles, however,

areretainedQnthe conveyor belt by the action of *the magnetic held until that portion of the conveyorlbelt passes completely through the magnetic field upon which event, the magnetic tail- .i lgs are ath ed Elna se arat ece tac .:From. th e es inad e ript en, the onstru .t m and op ra on. of th inv nti n will .b d- .ily appar nt- H w ve s nce num r us .moll .fieafiensand chans s will readily o c t t s skilled in theart after a carefulperusalof the iq ese ns speeifiea iontake n con nc ion with theeeeomnanyins awin ,.it -I desired to limit the invention to the exact construction lshownand described. But, all suitable.,modifi- .;catio ns maybe resorted ,to which fall .within the scop of .theapn dc aim- Whatis claimed as new isas follows:

In a} magnetic ore separator, a portable frame adapted'to be mounted .On a main supporting frame, said p rtabl frameeQmpriSiI E aipair f sid ram .member eonnected. at th -end b .fron n iear, cross.memb s,.a ma ne i pu y i urnales e s id fra e interm dia t e end -.th r .of, .a ve t ee y ro ectin threadedi est s u ed t v t e. .centralper en f sa fr nt cros .m m er an a l ngated a .adius abl cured t said .fafieeerseid :ha having. its end eumf renti l v ab ut, the p rinhery s P l -W A L References 'Citedjn the file of this patent UNITED QSTA'EES (PATENT Number Name Date 432,823 Finney- 'J-uly-22,-1-890 "255875-891 "Potthofi Mar.-4, -2

FOREIGN PATENTS Number Country Date 72,080 ;Germany Feb..18,.1939

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