Improvements in Apparatus for the Treatment of Slag.
Year: 1890

page_text: Deing date or nrst Foreign Application in 3rd Mar, 1030
United States of America).
Date of Application (in United Kingdom), 27th Sept., 1890
Complete Specification Left. 27th Sept.. 1890-Accepted, 14th Mar., 1891
Date of Application (in United Kingdom), 27th Sept., 1890
Complete Specification Left. 27th Sept.. 1890-Accepted, 14th Mar.. 1851
COMPLETE SPECIFICATION.
Improvements in Apparatus for the Treatment of Slag.
I, ORRIN BURTON PECK, of 162, 34th Street, Chicago, Illinois, United States:
of America, Mining 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 :--
The object of my invention is to provide means for granulating molten slag and
pumping or conveying the granulated slag away; and the invention consists in the
features and combinations hereinafter described.
In the accompanying drawings,
Figure 1 is a side elevation, partly in section, of my improved granulating and
pumping apparatus :
Figure 2 is a plan view of the same;
Figure 3 is a plan of a modified form of apparatus ;
Figure 4 is a section taken on the line 44 of Figure 3, and
Figure 5 is a cross-section taken on the line 5 5 of Figure 4.
V is the vessel, by means of which the molten slag is granulated; A, a shaft,
by which the vessel is supported and rotated; B, journal-boxing; C, a centrifugal
or force pump; D, a pipe or conduit for introducing water; E, a curb forming a
chamber around the slag-vessel; F, a passage between the chamber and pump;
H, a spout or conduit for carrying away the slag and water from the pump;
I, the spring-actuated bottom of the trap; J, a spring for actuating such bottom;
K, a cord for operating the gate in the discharge-pipes; and L, such gate.
My improved apparatus consists, essentially, of a centrifugal machine having a
revolving vessel or receptacle adapted to receive the molten slag or product to be
granulated and to discharge the same in small or divided particles; a pipe or
conduit for introducing water and spraying it on the molten slag as the slag is
discharged in particles from the receiving vessel or receptacle; a surrounding curb
forming a chamber for arresting the water and granulated slag; a centrifugal or
other force pump for pumping away the granulated slag and water, and suitable
pipes or passages for connecting the pump with the machine and for carrying away
the granulated slag and water.
The centrifugal machine is provided with a vessel or receptacle for receiving
the molten slag and discharging it in divided particles. The rapid revolving of
this receptacle causes the slag to be thrown off or out of it, preferably from the
top, in a granulated state, or rather in finely divided particles, which in cooling are
solidified in a granulated state. Most of the separated particles thrown off or out
from the receptacle are of a spherical form, so that when cooled most of the slag
is in little round particles something like shot. This enables them to be pumped
out with the least possible wear or injury to the machine.
The curb around the receiving vessel or receptacle forms an annular chamber,
but the chamber may be in any other form desired into which the finely-divided
particles are thrown, and from which, after cooling, they pass into the passage or

page_text: conduit leading to the pump. Through the pipe at the top water is introduced
into the annular chamber, and, coming in contact with the separated particles of
the molten slag, causes them to become quickly cooled and hardened, and thus
prevents them from uniting or sticking together in mass. The water also assists
in washing the granulated slag out of the chamber and enables it to be readily
carried or pumped away.
I prefer to connect the chamber with the pump by means of a spout, as shown;
but any other form of connection capable of enabling the granulated slag to pass
from the chamber or machine to the pump as, for instance, a mere opening in the
chamber in position to permit the water and slag to run out into the pump may be
used.
As shown in Figures 2 and 3, I provide for the use of two pumps, so that in case
one becomes clogged or stopped up the stream of outflowing slag and water may
be directed into and pumped off by the other. Although one pump will generally
be found sufficient, I prefer to use two, so as to avoid the necessity of stopping the
machine in case one becomes clogged or inoperative. In some cases, also, the
spouts leading to the pumps, when two or more pumps are used, may be provided
with traps, (see Figures 3 and 5,) so that in case one pump becomes clogged the
slag will accumulate on the trap and the weight of the accumulated slag will press
the trap down and close that spout, thus causing all the outflowing water and
granulated slag to be directed into the other spout and pump.
I prefer to employ a centrifugal pump for forcing or conducting away the water
and granulated slag; but any other suitable pump capable of doing the work may
be used for this purpose. The pump may of course be operated by power in any
convenient way.
The discharge pipe or passage leading from the pump may be in any form and
extended to any distance desired; but it will generally be found advisable to
extend it to the point of final deposit for the slag.
In operation the molten slag is introduced into the revolving receptacle, thrown
off or out by its rapid revolving, quickly cooled, and hardened by means of the
water sprayed upon it, and washed or carried out to the pump and thence through
the discharge-pipe to a place of deposit.
In my applications of even date herewith I have shown some of the features
shown in the drawings of this Application, but not claimed herein.
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 combination of a centrifugal machine provided with a revoluble
receptacle adapted to receive molten material and throw the same off in finely-
divided particles and also with a surrounding chamber and means for introducing
water therein, a conduit or passage leading from the chamber, a pump with which
the conduit or passage communicates, and a discharge pipe or conduit leading from
the pump, whereby the slag may be granulated and the water and granulated slag
forced from the machine to a place of deposit, substantially as described.
Second. In combination with a centrifugal machine and pumps, branch conduits
leading from the machine to the pumps, a movable gate at the junction of the
branches, traps in each branch constructed to be actuated by the pressure of
superincumbent slag, and connections between the gate and the traps, whereby an
undue accumulation of slag upon the trap of either branch serves to throw the gate
across the entrance to such branch, substantially as described.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.