IMPROVEMENTS IN BOGIES AND MOULDS FOR COOLING AND DISCHARGING SLAG
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I, WILLIAM COCHRANE, of St John's Chambers Newcastle-upon-Tyno in the
County of Northumberland Mining Engineer do hereby declare the nature of
my invention for "IMPROVEMENTS IN BOGIES AND MOULDS FOR COOLING AND
DISCHARGING SLAG," to be as follows:-
My invention relates to an improved construction of Bogies and moulds for
cooling and discharging slag whereby a more effectual cooling and breaking up of
the slag blocks are effected than with arrangements heretofore employed.
According to my invention, I construct such trucks with a hollow central
partition or ridge rising up from the bottom of the bogie, but not so high as the
casing or mould which is shaped so as to fit over the ridge and rest on the floor of
the bogic. The interior of the ridge is open at both ends, so that there is freo
circulation of air through it. The slag as it runs into the casing of the bogie, first
fills the space on one side of the ridge, forming a comparatively thin layer of slag
which as it runs in becomes considerably cooled by contact with the side of the
casing and the side of the ridge, both of which are cooled by the exposure of their
outer surfaces to the atmosphere. The slag then flows over the ridge and fills the
space on the other side thereof becoming cooled in a similar way. Finally the slag
fills the upper part of the bogie casing above the ridge, forming a more or loss-
imperfect junction with the top surface of the partially cooled body of slag first
run in, and thus facilitating subsequent fracture.
The slag block thus formed with a hollow ridge passing through it from side to
side is, on solidifying, subject to variations of contractions which greatly facilitate
the breaking up of the mass, when the casing is removed and the bogio is run down
an incline against the bumping blocks, such fracture also being further facilitated-
by the fact that the block is practically divided into two masses by the ridge and
only connected by the thickness of the layer above the ridge; this connection being
imperfect owing to the circumstance that the last or uppermost portion has to flow
over the cooled and partially set mass on one side of the ridge.
The hollow ridge is made of angular or wedge shape either straight or swelling
out at the middle, and the casing may be circular in plan but it is preferably of.
elliptical form as with this shape the block of slag is liable to such inequalities of.
contraction as facilitate greatly its breaking up. The ridge may be made in one:

page_text: piece with the bogie bottom, or may be a separate piece bolted thereto, its top being
either level or inclined, and its shape may be varied so long as a clear passage for
air is maintained through it.
Instead of making the ridge rise in wedge form from the bottom of the bogie, it
may be inverted, so as to form a deep furrow in the mass of slag, which would thus
be almost divided into two side masses imperfectly connected at the bottom. When
this arrangement is adopted, the pieco which forms the furrow is either attached to
the casing or is dropped into notches of corresponding shape in the walls of the
casing.
Dated this 17th day of November 1884.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C."
I, WILLIAM COCHRANE, of St John's Chambers, Newcastle upon Tyne, in the
county of Northumberland, Engineer, do hereby declare the nature of my invention
for "IMPROVEMENTS IN BOGIES AND MOULDS FOR COOLING AND DISCHARGING
SLAG " and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
My invention relates to an improved construction of bogies and moulds for cooling
and discharging slag whereby a more effectual cooling and breaking up of the slag
blocks are effected than with arrangements heretofore employed.
According to my invention I construct such trucks with a hollow contral partition
or ridge rising up from the floor of the bugio, but not so high as the casing or
mould, which is shaped so as to fit over the ridge and rest on the floor of tho bogie.
The interior of the ridge is open at both ends, so that there is free circulation of air
through it. The slag, as it runs into the casing of the bogie, first fills the space on
one side of the ridge, forming a comparatively thin layer of slag which as it runs
in becomes considerably cooled by contact with the sido of the casing and the side
of the ridge, both of which are cooled by the exposure of their outer surfaces to the
atmosphere. The slag then flows over the ridge and fills the space on the other
side thereof, becoming cooled in a similar way.
Finally the slag fills the upper part of the bogio casing above the ridge, forming
a more or less imperfect junction with the top surface of the partially cooled body
of slag first run in, and thus facilitating subsequent fracture. The slag inay also be
run in on each side simultaneously by means of a double channel.
The slag block thus formed with a hollow ridge passing through it from side to
side is, on solidifying, subject to variations of contractions which greatly facilitate
the breaking up of the mass, such breaking up being further effected when the
casing is removed and the bogie is run down an incline against bumping blocks,
and being facilitated by the fact that the block is practically divided into two
masses by the ridge and only connected by the thickness of the layer above the

page_text: Figs. 1 to 4 of the accompanying drawings shew one arrangement of moulds
constructed according to my invention, which moulds are assumed to be mounted
on the floor of a bogio or truck. Fig. 1 shows a longitudinal section, Fig. 2 an end
elevation, Fig. 3 a sectional plan on line XX Fig. 4, and Fig. 4 a cross section on
line Y Y Fig. 3. A is the ridge, which is secured to the bogic floor C by bolts
passing through lugs A¹; it is made to taper in width from the middle to the two
ends AA which constitute narrow slits, through which the air has free passage,
and over which fits the elliptical outer casing or mould B, secured together by bolts
passing through the lugs B¹.
When the slag is run in, it first fills the space on one side of the ridge and then
flows over the top of the latter into the space on the other side. When this is full
the slag fills the space in the mould above the ridge, and thus it will be seen that
the slag block thus formed consists of two masses, gradually cooling and splitting
up, only connected together at top so that on removing the casing and running the
bogie against bumping blocks, the slag block will be thoroughly broken up, this,
action being greatly facilitated by the unequal shrinking of the masses on cooling,
owing to their irregular shape and thickness, and also to the fact, as before stated,
that the mass on one or both sides of the ridge will have become partly solidified
before the slag reaches the level of the top of the ridge, and thus an imperfect
junction will be formed at or about that level. As before stated, the slag may also
be run in simultaneously on both sides of the ridge by a double channel.
Figs. 5 and 6 shew respectively a longitudinal section and a sectional plan of an
arrangement in which the casing or mould B is circular instead of elliptical, the
construction being otherwise precisely the same as described with reference to
Figs. 1 to 4. In the arrangement shewn in longitudinal and cross section at
Figs. 7 and 8, the ridge A is of a somewhat different shape, and it is divided
longitudinally into two separate halves secured together by bolts passing through
flanges A. This construction may bo varied by making the ridge of more than two
pieces, and securing them in any similarly efficient manner. Fig. 9 shews an
elevation of an arrangement in which the ridge A is made of an angular section and
of the same width throughout, instead of being narrowed at the ends as in the
previous cases; Fig. 10 shews a plan of this form of ridge as applied to a circular
casing or mould, and Fig. 11 shews the same as applied to a rectangular mould.
Figs. 12, 13, 14 and 15 shew respectively a longitudinal section, an end view,
a sectional plan on line XX and a cross section on line YY of an arrangement
in which the ridge A is constructed in precisely the same manner as in the

page_text: arrangement at Figs. 1 to 4, but is arranged in an inverted position, with its open
side level with the top of the mould B and with its closed side situated at a certain
distanco from the floor of the bogie or mould, the ridge being supported in this
position by the mould B, through the sides of which its ends pass, as shewn.
In this case, the slag, in being run in on one side of the ridge, flows at once under-
neath the same to the other side or it may be run in on both sides simultaneously
by means of a double channel.
The ridge being open both at the ends and at top, a very effectual cooling action
by the circulation of air will be maintained.
The inverted ridge can be removed either alone or with the mould or casing, thus
allowing the cooling action to take effect directly upon the slag.
Having now particularly described and ascertained the nature of my Bnid
invention and in what manner the same is to be performed, I declare that what
I claim in respect of bogies and moulds for cooling and discharging slag is:
1. The use of a hollow partition or ridge extending right across the casing
or mould and having openings for the ingress and egress of air at both ends,
substantially as and for the purposes herein described.
2. Constructing hollow partitions or ridges in combination with the outer casing
or mould as herein described with reference to the accompanying drawings.
Dated on way of January 1000.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.