Improvements in Electro-magnetic Ore Separators.
Year: 1898

page_text: Date of Application, 20th July, 1898-Accepted, 12th Nov., 1898
COMPLETE SPECIFICATION.
Improvements in Electro-magnetic Ore Separators.
I, HUGO ERICH LANGGUTI, of No. 62, Templergraben, Aix-la-Chapelle, in the
German Empire, Mining Engineer, and Assistant of the Royal School of Engineer-
ing, Aix-la-Chapelle, do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the folowing statement:-
о
This invention relates to electro-magnetic ore separators. Such separators
as are used at present do not fulfil the requirements as to capacity, consumption
of power, simplicity of construction and attendance, that are desirable.
This invention is designed to allow the most advantageous utilisation of electrical
energy by the production of a highly concentrated magnetic field by means of a
single rotary electro-magnet, in order to extract all magnetic substances from large
masses of ore in the shortest time and with a small expenditure of power.
In order that this invention may be the better understood I now proceed to
describe the same with reference to the accompanying drawings and to the letters
and figures marked thereon.
Figure 1 shows a construction of the electro-magnetic device.
Figure 2 shows a modified construction of same.
Figure 3 shows the electro-magnetic device mounted revolubly in bearings with
means for collection of the current.
Figure 4 shows the electro-magnetic device operating without a contact band.
Figure 5 shows two devices superposed having contact bands.
As shown in Figures 1 and 2 the ore separator consists of a soft iron core K
which being wound with wire W₁ acts as an electro-magnet. It carries at both
ends annular pole shoes A and B shaped cylindrically or pan-shaped.
The lines of force passing always through iron, go through the air only at the
pole points A and B therefore they form an intense magnetic field only on the
surface of the circular rim.
In order to increase the intensity of the magnetic field a further wire winding W³
may be provided on the outer edge of the rim or wheel; Figure 2. In this manner
the lines of force are still more concentrated whereby magnetic dissipation is
rendered almost impossible. This is a special advantage compared with known
apparatus.
As the distance between the two poles is nevertheless limited, the capacity
of the separator is considerably increased by the insertion of one or more iron
rings R Figure 2, between the poles A and B. Magnetic fields are thus produced
between the rings. The objectionable air space between the poles is thus con-
siderably decreased, but the whole magnetic field is increased. The free spaces
between the rings and the pole faces are preferably wound with wire level with
the outer edge of the periphery of the rim or wheel. For this purpose the wire
used is thinner than that for winding around the iron core and the rim. The
hinner wire is then connected in known manner to form an auxiliary connection
with the thicker wire.

page_text: The rim or wheel is adapted to rotate about a horizontal axis. The current is
passed by rubbing brushes T, Figure 1, and the discs M mounted on insulated
supports.
The operation of the separator is illustrated in Figures 3, 4 and 5. It can
be operated without a contact band as shown in Figure 4, in which case the surface
of the rim or wheel is preferably grooved, parallel to the axis to prevent the sliding
off of the material; or it may be operated with a contact band, Figure 5 wheel II;
or two devices may be superposed upon one another, Figure 5.
The working of the separator with two rims or wheels is shown in Figure 5.
About the peripheries of the two magnet wheels I and II are situated two trans-
porting bands F¹ and Fa. The ore fed to the band by the feeder G is carried to
the wheel I, is attracted, if magnetic below the poles A and B, Figure 1, carried
upwards by the rotation of the apparatus, and fed into the box N¹. The other
ore passes to the magnet wheel II. The magnetic ore is here attracted and held
by the poles, the non-magnetic or only slightly magnetic ore falls by gravity and
centrifugal force into the receptacles N and N³. The remainder of the magnetic
ore falls when removed from the magnet by the transporting band into the box N2.
Thus the ore is sorted in the receptacles N to N4 according to its magnetic degree.
It should be noted that when no running band is used, the ore attracted and
held on the outer periphery at 0, Figure 4, is removed by a brush and falls into
the receptacle N¹.
As the magnetic field is intense, the velocity of the rim or wheel and therefore
the quantity of ore to be treated may be considerably greater than in known
apparatus.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1st. An electro-magnetic ore separator in the form of a wheel or rim, consisting
of a single rotary electro magnet with cylindrical or pan-shaped poles of U section
situated opposite to each other.
2nd. The arrangement and construction of a magnetic separator, substantially
as described and illustrated in and by the accompanying drawings.
"
1000
FELL & JAMES,
Agents for the Applicant.