Improvements relating to Separation of Iron and other Magnetic Impurities from Grain and other Materials.
Year: 1890

page_text: Date of Application, 3rd Mar., 1890
Complete Specification Left, 1st Dec., 1890-Accepted, 14th Feb., 1891
PROVISIONAL SPECIFICATION.
Improvements relating to Separation of Iron and other Magnetic
Impurities from Grain and other Materials.
I, PHILIPP ADAM TAFEL of Augsburg in the Kingdom of Bavaria, Germany,
Engineer, do hereby declare the nature of this invention to be as follows:-
-
This invention relates to a novel method and apparatus for separating magnetic.
impurities which are frequently found in grain and other granular or pulverized
materials and it consists of a rotating drum provided with a number of annularly
arranged magnets over the free poles or sides of which the material to be separated
is conducted by means of an inclined channel in such a manner that the magnetic
impurities become attracted by the rotating magnets and carried outside of the said
channel, where they are scraped off and separately collected.
For this reason the magnets, which may be either permanent or electro-magnets
are arranged so as to have their free poles within the face of a drum in the form.
of a ring and the drum is situated within a corresponding circular aperture of the
bottom of a channel in such a manner, that the face of the rotating drum, the actual
sides of the magnets and the bottom of the conducting channel will form a continuous.
inclined plane.
In the direction of rotation of the said magnet drum each side wall of the
conducting channel which is so situated and of such a width in relation to the
annular magnetic field, that the outlines of the channel form secants of the inner
circle of the magnet ring is provided with a port for the passage of the magnetic
impurities, attracted by the magnets. In consequence of the rotation of the latter
the magnetic impurities are conducted outside of the said inclined channel and
scraped off from the magnets as soon as they meet the solid outer face of the
corresponding side walls of the channel, where they may be conveniently
discharged.
In this manner the material to be purified is caused to pass over two magnetic
fields for the purpose of securing a thorough purification of the said material from
magnetic parts. The said conducting channel and magnet drum is arranged inclined
o the horizontal in order to provide the necessary slope for the material to be
transported over the magnetic fields by its gravity.
Dated this 3rd day of March 1890.
:
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements relating to Separation of Iron and other Magnetic
Impurities from Grain and other Materials.
I, PHILIPP ADAM TAFEL, of Augsburg, in the Kingdom of Bavaria, in the
Empire of Germany, Engineer, 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 following statement :-
This invention relates to a novel method of and apparatus for separating magnetic
impurities which are frequently found in grain or other granular or pulverized
materials; and the object of my said invention is to provide a rotating drum with
a number of annularly arranged magnets over the free poles or sides of which the
material to be separated is conducted by means of an inclined channel in such a
manner that the magnetic impurities or particles become attracted by the rotating

page_text: separately corrected.
I attain these objects by the arrangements illustrated in the accompanying
drawings, in which
Figure 1 is a vertical section of an apparatus constructed according to my said
invention;
Figure 2 is a top view of the supply channel and the rotating drum with the
magnets;
Figure 3 represents a modification.
The magnets which may be either permanent or electro magnets are arranged
within the rotating drum b, so as to have their free poles or sides within the upper
face of the drum in the form of one or more rings, Figures 2 and 3.
The rotating drum b, which may be actuated from the driving-pulley k on the
shaft i through the medium of the bevel gears l, m, situated within a corresponding
circular aperture of the bottom a of an inclined channel A in such a manner that
the face of the rotating drum, the actual poles or sides of the magnets, and the
bottom a of the conducting-channel A will form a continuous inclined plane,
Figure 1.
The conducting-channel is so situated and of such a width in relation to the
annular magnetic field that the outlines of the channel form secants of the inner
circle of the magnet ring. Each side wall of the said conducting channel is provided
with a port or ports g and h for the passage of the magnetic impurities or particles
attracted by the magnets f. In consequence of the rotation of the latter the
magnetic impurities or particles are conducted outside of the inclined channel and
scraped off from the magnets as soon as they meet the solid outer face of the
corresponding side walls c d of the channel, where they may be conveniently
discharged.
In this manner the material to be purified or separated is caused to pass over
two magnetic fields for the purpose of securing a thorough purification or separation
of the said material from the magnetic parts. The said conducting-channel A and
magnet-drum bis arranged at such an angle to the horizontal as to provide the
necessary slope for the material to be transported over the magnetic fields by its
gravity.
In several cases for separating magnetic ores from their gangue, I may arrange
two or more rotating magnetic drums b in the same channel, or I may arrange the
series of magnets side by side in order to obtain a thorough separation of the
magnetic particles, as seen in Figure 3.
In order to separate the magnetic impurities or particles from diamagnetic parts
adhering thereto, I may provide bristles or brushes made of other material within
the ports 9 and of the side walls of the conducting channel A, which are adapted
to retain such diamagnetic parts within the channel.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
First. The apparatus for separating magnetic particles or impurities from grain
or other granular or pulverized materials, consisting of the combination of one or
more rotating inclined drums in the face of which the free poles or sides of perma-
nent or electro-magnets are arranged in the form of a ring or rings, and an inclined
channel arranged to receive within apertures in its bottom the said magnet drum or
drums in such a manner that the face of the rotating magnet drum or drums, the
free poles or actual sides of the magnets, and the bottom of the conducting-
channel will form a continuous inclined plane, substantially as and for the purpose
set forth.
Second. As an improvement in apparatus for separating magnetic particles or
impurities from grain or other granular or pulverized materials, the combination,
with one or more rotating drums having within their face permanent or electro-

page_text: magnets annularly arranged, of an inclined channel, being adapted to receive said
drum or drums within corresponding apertures of its bottom and having in its side
walls suitable ports for the passage of the magnetic particles attracted by the
magnets, substantially as and for the purpose hereinbefore described.
Dated this 1st day of December 1890.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.