IMPROVEMENTS IN MACHINES FOR COOLING AND GRANULATING SLAG OR SCORIA
Year: 1872

page_text: LETTERS PATENT to Charles Wood, of the Tees Iron Works, Middles-
bro'-on-Tees, in the County of York, for the Invention of
"IMPROVEMENTS IN MACHINES FOR COOLING AND GRANULATING SLAG OR
SCORIA."
Sealed the 3rd December 1872, and dated the 3rd September 1872.
PROVISIONAL SPECIFICATION left by the said Charles Wood at the
Office of the Commissioners of Patents, with his Petition, on the
3rd September 1872.
I, CHARLES WOOD, of the Tees Iron Works, Middlesbro'-on-Tees, in
the County of York, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN MACHINES FOR COOLING AND GRANULATING SLAG OR SCORIA,"
to be as follows:-
This Invention has for its object improvements in machines for
cooling and granulating slag or scoria as it flows in a liquid state from
the blast or other smelting furnace. For this purpose the slag or scoria,

page_text: as it flows from the usual runner or spout, is received into a tank of water.
This water is kept in a continual state of agitation by suitable means,
such as a wheel or a chain elevator, having floats or buckets working
inside the tank, and partially in the water. The buckets or floats agitate
the water, and elevate the granulated slag or scoria at the same time;
or the slag or scoria may be elevated by an Archimedean screw.
The
granulated slag or scoria then falls into a spout, whence it passes into a
wagon.
The action of the agitated water upon the stream of liquid slag or
scoria is to reduce it into a state like coarse sand or gravel. A stream
of water is kept continually running into the tank so as to make up the
loss by evaporation and waste.
SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said Charles Wood in the Great Seal Patent Office on
the 3rd March 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
WOOD, of the Tees Iron Works, Middlesbro'-on-Tees, in the County of
York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Third day of September, in the year
of our Lord One thousand eight hundred and seventy-two, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Charles Wood, Her special license that
I, the said Charles Wood, my executors, administrators, and assigns,
or such others as I, the said Charles Wood, my executors, adminis-
trators, and assigns, should at any time agree with, and no others, from
time to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for ** IMPROVEMENTS IN MACHINES FOR
COOLING AND GRANULATING SLAG, OR SCORIA," upon the condition (amongst
others) that I, the said Charles Wood, my executors or administrators,
by an instrument in writing under my, or their, or one of their hands

page_text: and seats, sound particularly describe anu
CHC
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said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Scal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Charles Wood, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say :-
This Invention has for its object improvements in machines for
cooling and granulating slag or scoria as it flows in a liquid state from
the blast or other smelting furnaces. For this purpose the slag or
scoria as it flows from the usual runner or spout is received into a tank
of water. This water is kept in a continual state of agitation by various
means, to wit, either by the tank being kept in motion, or (the tank
being stationary) by a wheel having floats, buckets, or agitators, either
internally or externally, or by a chain clevator with floats, buckets, or
agitators working inside the tank partially in the water. The floats,
buckets, or agitators thus agitating the water and elevating the slag or
scoria at the same time; or it may be done by an Archimedian screw,
which would elevate the granulated slag, and agitate the water at the
same time.
The granulated slag or scoria then falls into a spout,
whence it passes into a wagon.
The action of the agitated water upon the stream of liquid slag or
scoria is to reduce it into a state like coarse sand or gravel, the size of
such sand or gravel varying according to the speed and other circum-
stances in connection with the working of the machine. A stream of
water is kept continually running into the tank so as to make up the
loss by evaporation and waste.
Having thus described the nature of my Invention, I will proceed to
describe more fully the manner of performing the same.
DESCRIPTION OF THE DRAWINGS.
On Sheet 1 of the Drawings hereunto annexed I have shewn an
arrangement of machine, in which the tank itself is revolved. Figure 1
shews a side clevation, and Figure 2 an end elevation of the machine;

page_text: The action of the machine is as follows:-The tank is first filled with
water; the liquid slag is then made to flow from the runner G into the
water in the tank. The buckets or floats are at the same time set in
motion, and they not only serve to agitate the water in the tank, but
also carry upwards the slag as it is granulated, and tip it over into a
wagon or other receptacle, as shewn, the water having previously drained
off from it through the perforations or slits formed for that purpose in
the buckets.
On Sheet No. 3 is shewn a longitudinal vertical section of another
arrangement of machine with a stationary tank and an Archimedian
screw for agitating the water therein, and for withdrawing from it the
granulated slag; A is the stationary tank fixed upon a frame B, which
may be either mounted upon wheels, as shewn, to run upon a railway,
or be placed upon a foundation%3B C is a large inclined tube mounted
upon rollers K, K, so that it can be revolved freely, and has fixed inside
it a screw thread with slits or perforations formed through it to allow
water to pass. At the bottom of the tube is a ring D, which has fixed
upon it paddles or agitators E. The tube C has fixed upon it a toothed
wheel G, and is caused to revolve by a pinion H gearing therewith,
and driven by the small steam engine F, or by other motive power.
The action of the machine is as follows:-The tank is first filled with
water, and the liquid slag is allowed to flow from a runner or spout into
the water in the tank, as shewn, at the same time the tube is revolved,
and the paddles or agitators carried by it keep the water in a state of
agitation. The slag is thereby reduced into granules, which slide down
the guide I, and pass into the interior of the tube C, or are carried into
this tube by the agitation of the water. As the tube O revolves the
screw blade in its interior carries the granulated slag up to the upper
end of the tube, and drops it into a wagon or other receptacle. The
waste of water in the tank from evaporation and other causes is made
good by a fresh supply of water conducted into the tank by a small
pipe.
Having thus described the nature of my Invention, and the manner of
performing the same, I would have it understood that I do not confine
myself to the exact constructions of machinery herein described, but I
claim, the construction of machinery for cooling and granulating slag in

page_text: such a manner that the liquid slag may be received into a bath of water
kept in a state of agitation, and be continuously raised therefrom in a
divided or granulated form, and deposited into wagons or other recep-
tacles by elevating apparatus, substantially as herein described.
I also claim the arrangements of granulating apparatus, substantially
as herein described and shewn in the Drawings hereinto annexed.
In witness whereof, I, the said Charles Wood, have hereunto set
my hand and seal, this Twenty-eighth day of February, in the
year of our Lord One thousand eight hundred and seventy-
three.*