A New or Improved Process for Separating Magnetic from Non Magnetic Particles and Apparatus therefor.
Year: 1889

page_text: Date of Application, 10th Sept., 1889-Accepted, 2nd Nov., 1889
A New or Improved Process for Separating Magnetic from
Non Magnetic Particles and Apparatus therefor.
I HERBERT JOHN HADDAN of the firm of Herbert & Co., Patent Agents of 18
Buckingham Street Strand W.C. in the County of Middlesex, Civil Engineer do
hereby declare the nature of this invention a communication to me from abroad by
Gurdon Conkling of Glens Falls, in the State of New York United States of America,
Manufacturer and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:-—
The principal object of this invention is to remove from magnetic iron ore the
particles of iron free from phosphorous or other detrimental impurities in an eco-
nomical manner, but this invention can be applied with advantage to many other
substances where it is desirable to separate magnetic particles from non-magnetic
substances.
The apparatus which can be used in carrying out this invention is illustrated in the
accompanying drawing in which
Fig. 1 represents a vertical section in the plane x x Fig. 3.
Fig. 2 a similar section in the plane y y Fig. 3.
Fig. 3 a plan or top view.
Fig. 4 is a transverse section in the plane z z Fig. 1.
Fig. 5 is a longitudinal vertical section of a modification.
Similar letters indicate corresponding parts.
In this drawing, the letter A designates a trough which is supported by the frame B
and which is placed in an inclined position (best seen in Fig. 2). For the purpose of
adjusting the inclination of the trough the following means may be used.
To the under surface of said trough near one of its ends are firmly secured two
eyes a one near each side and through these eyes extend a rod b which has its bearings
in the frame B. The opposite end of said trough is supported by two arms c c (Figs. 1
and 4) which are firmly secured to its under surface and which are provided with
slots c. Through these slots extend studs c², the outer ends of which are provided
with screw threads to engage with nuts c3 so that the trough can be turned on the
rod b and secured to the required inclination by means of the nuts c³.
Above the trough A is situated an endless belt C which runs over two drums D D,
the shafts of which have their bearings in standards E E and to one of which is
imparted a revolving motion by suitable means such as a belt and pulley. In proximity
to the endless belt Care placed one or more magnets F which may be permanent
magnets or plates magnetized by electro magnets. The magnets F are secured to
traverses F¹ which are supported by screw studs ff so that the magnets F can be
raised or lowered.
By referring to the drawing (particularly Fig. 1) it will be seen that the belt C is
placed in an inclined position to correspond to the inclination of the trough A. If the
inclination of the trough A is changed, that of the belt C must also be changed to
correspond and in order to accomplish this object I in the simplest possible manner I
place the standards E E which form the bearings for the shafts of the drums D D
upon a frame H which is firmly connected to the trough A and the screw studs ff
which support the traverses F1 and magnetic plates F are also secured to this same
frame so that if the inclination of the frame A is changed the belt C and the magnets F
must follow and the required relation between the trough and the belt is preserved at
all times.
The substances to be separated after having been comminuted to a suitable fineness
are mixed with water or other suitable liquid and conducted in a thin stream upon the
trough A. When the apparatus is to be used for separating the iron particles contained

page_text: in the tailings of a wet ore separator such as a jigger such tailings may be conducted
to the trough A directly from the jigger through a trough I. As the stream containing
the substances to be separated passes beneath the belt the magnetic particles con-
tained therein are lifted up from and out of contact with said stream by the magnets F F
so that they adhere to the under surface of the belt C. and by this belt they are carried
away in the direction of the arrow marked on said belt in Fig. 2. until they reach the
scraper J, by the action of which they are swept off from the belt and caused to drop
down into the receptacle K.
From this description it will be seen that the magnetic particles contained in the
stream of liquid running down over the trough A are lifted up from and out of said
stream by the attraction of the magnet or magnets F and then collected in the recep-
tacle K. while the stream, carrying the non magnetic particles continues on its course
without obstruction and the particles which have been attracted by the magnets are
not liable to be swept off by the stream of liquid passing down over the trough.
In the example shown in Fig. 5 the letter A designates the trough which is sup-
ported by the frame B. C is the endless belt which extends in the direction of the
trough and beyond its lower end.
The magnetic particles which are attracted by the magnet F and adhere to the belt C
are collected in the receptacle K.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The within described process for separating magnetic. from non magnetic particles
which consists in exposing a running stream of liquid containing the substances to be
separated to the action of a stationary magnet, lifting the magnetic particles carried
by said stream up from and out of contact with the stream and conducting the particles,
which have followed the attraction of the magnet, into a suitable receptacle.
Dated this 10th day of September 1889.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.