Improvements in or relating to Injecting Steam into Cupolas in the Process of Melting Iron.
Year: 1899

page_text: Date of Application, 9th Feb.,
1899
Complete Specification Left, 4th Nov., 1899-Accepted, 9th Feb., 1900
PROVISIONAL SPECIFICATION.
Improvements in or relating to Injecting Steam into Cupolas in the
Process of Melting Iron.
I, GEORGE LOUIS MORTON, Managing Engineer to The Doherty Iron Castings
Process, Limited, of 32, Victoria Street, Westminster, London, S.W., do hereby
declare the nature of this invention to be as follows:
In Letters Patent Nos. 8368 of 1896 and 2226 of 1897 the means shown for
introducing steam through the tuyeres into a cupola consist of a single steam
pipe in the tuyere.
Now the present invention consists in introducing steam through the tuyeres
into a cupola by means of a pipe arranged in a ring or coil or spiral or other like
form advantageously corresponding with the contour of the tuyere to which pipe
the steam is led by any suitable pipe or connection the said ring etc. being
formed with a series of holes or openings through which the steam is emitted,
such holes or openings being advantageously drilled on the inside of said ring
either radially inwards so that the steam jets converge and meet one another at
the centre of said ring or at such an angle that the said jets of steam converge in
a conical form at a short distance beyond the ring towards the opening of the
tuyere into the cupola-the said ring etc. being mounted in any suitable manner
in the tuyere but advantageously embedded or partly embedded in the wall or
lining of the tuyere, and the steam pipe leading thereto may also advantageously
be embedded or partly embedded in the tuyere lining or wall of the cupola, so
that a clear opening is thus left through the tuyere for the poker or other device
to be passed therethrough when desired.
The air blast is introduced through the tuyere in the usual or any suitable
manner and carries in with it the steam issuing in a series of jets (in the form of
a ring or rings) as aforesaid owing to said converging ring (or rings) of steam
jets being interposed in the path of said air blast on its way to the interior of
the cupola and thereby the steam combined with the air blast is introduced into
the cupola in a very efficient manner.
The steam pipe at the point where the series of jets issue therefrom as afore-
said may be other than in the exact form of a ring or circle-for instance if the
form of the tuyere be oval, square or rectangular the steam pipe would be made
to follow the shape of said tuyere.
By this invention important advantages are obtained in carrying out the
Doherty process for melting iron according to the above-named patents—the steam
being introduced in as dry a form as possible advantageously by means of
ment, of steam pipes as shown in the aforesaid Patent No. 2226 of 1897.
arrange-

page_text: Improvements in or relating to Injecting Steam into Cupolas in the
Process of Melting Iron.
I, GEORGE LOUIS MORTON, Managing Engineer to The Doherty Iron Castings
Process, Limited, of 32, Victoria Street, Westminster, London, S.W., do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:—
In Letters Patent Nos. 8368 of 1896 and 2226 of 1897 the means shown for
introducing steam through the tuyeres into a cupola consist of a single steam
pipe in the tuyere.
Now the present invention consists of novel means for introducing steam
through the tuyeres into a cupola viz. by means of a steam pipe or pipes fitted
around the interior of the tuyere, said pipe or pipes being arranged in a ring or
coil or spiral or other like form advantageously corresponding with the contour
of the tuyere, to which pipe or pipes the steam is led by any suitable pipe or
connection the said ring etc. being formed with a series of holes or openings
through which the steam is emitted, such holes or openings being advantageously
drilled on the inside of said ring so that the steam jets converge and meet one
another either at the centre of said ring or at such an angle that the said jets of
steam converge in a conical form at a short distance beyond the ring towards the
opening of the tuyere into the cupola-but in either case so as to converge in
and across the path of the air blast into the cupola-the said ring etc. being
mounted in any suitable manner in the tuyere but advantageously embedded or
partly embedded in the wall or lining of the tuyere (and the steam pipe leading
thereto may also advantageously be embedded or partly embedded in the tuyere
lining or wall of the cupola) so that a clear opening is thus left through the
tuyere for the poker or other device to be passed therethrough when desired.
The air blast is introduced through the tuyere in the usual or any suitable
manner and carries in with it the steam issuing in a series of jets (in the form of
a ring or rings) as aforesaid owing to said converging ring (or rings) of steam
jets being interposed in the path of said air blast on its way to the interior of the
cupola and thereby the steam combined with the air blast is introduced into the
cupola in a very efficient manner.
Referring to the accompanying drawings:-
Fig. 1 is a plan of a cupola having four tuyeres therein each fitted with a ring
nozzle according to the present invention.
Fig. 2 is a vertical section on line 2-2 Fig. 1; .e. taken right through the
tuyeres.
A is the wall of the cupola and B the tuyeres formed therein.
C is steam pipe from boiler (and super-heater where the latter is employed)
leading to each of the four ring nozzles D for instance by branch pipes C¹ as
shown these branch pipes each being provided with a cock or valve C
respectively to enable a supply of steam through each such branch pipe C₁ indi-
vidually to be regulated independently of the others and each such branch pipe
leading through the wind-belt E in any suitable manner and secured to and pass-
ing through the wall of said chamber E in any suitable manner for instance by
means of the nuts c d and a running coupling 2 to permit said connection to be
made in a steam-tight manner.
The ring D is provided with a series of holes or openings D¹ all round same
(advantageously drilled on the inside of said ring) in a direction so that the steam

page_text: jets issuing therefrom converge and meet one another at the centre or within
the plane of said ring, or said holes may be drilled or formed in other suitable
direction for instance at such an angle that the jets of steam issuing therefrom
will converge in a conical form at a short distance beyond the ring with the apex
of said cone of steam jets towards the interior of the cupola.
The ring D is shown embedded or partly embedded in the wall or lining of the
tuyere and also the part C2 of the steam pipe C¹ leading thereto may likewise be
embedded or partly embedded in the tuyere lining or wall of the cupola as shown
in Fig. 2 this arrangement having the advantage that neither this part of the
steam pipe nor the ring nozzle will be liable to be damaged by the poker or other
device passed through the tuyere into the cupola but it will be obvious that I do.
not confine myself to thus embedding or partly embedding the ring nozzle D in
the wall or lining of the tuyere as same may be mounted in any suitable manner
in the tuyere; so that a clear opening is thus always left through the tuyere for
the poker or other device to be passed therethrough when desired.
The air blast is introduced through the tuyere in the usual or any suitable
manner for instance through the wind-belt E which is provided with doors E¹ to
obtain access thereto opposite the tuyeres and forming observation holes in the
usual manner and such air blast carries in with it the steam issuing in a series of
jets (in the form of a ring or rings) as aforesaid owing to said converging ring or
rings of steam jets being interposed in the path of said air blast on its way
through the tuyeres to the interior of the cupola.
The steam pipe or nozzle 1 at the point where the series of jets issue therefrom
as aforesaid may be other than in the exact form of a circle as shown in the
drawings for instance if the form of the tuyere be oval, triangular, square or
rectangular the perforated steam pipe I would or could be made to follow the
shape of said tuyere, or the shape of the ring nozzle D may be of a different form
or shape from the shape of the tuyere.
By this invention important advantages are obtained in carrying out the
Doherty process for melting iron according to the above-named patents the
steam being introduced in a finely divided state and diffused over a larger area of
the incandescent mass than with a single jet of steam in each tuyere and enabling
a larger amount of steam to be decomposed.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed. I declare that what
I claim is:-
1. The combination with a cupola, and tuyeres in the said cupola; of steam
pipes fitted completely around the interior of the said tuyeres, and having per-
forations therein, substantially as described.
2. The combination with a cupola, and tuyeres in the said cupola; of steam
pipes fitted completely around the interior of the said tuyeres, and having per-
forations therein arranged to allow jets of steam therefrom to converge in the
path of the air blast; substantially as described.
3. The combination with a cupola, and tuyeres in the said cupola, of steam
pipes fitted around the interior of the said tuyeres and partly embedded in the
wall or lining of the tuyeres, the said steam pipes having perforations therein to
produce a ring of steam jets substantially as described.
4. The combination with a cupola, and tuyeres in the said cupola, of steam
pipes fitted around the interior of the said tuyeres and partly embedded in the
wall or lining of the tuyeres, the said steam pipes having perforations for the
escape of steam the said perforations being arranged to produce a series of jets
of steam which will converge in the path of the air blast, substantially as
described.
5. Apparatus for injecting steam into cupolas in the process of melting iron
consisting of a steam pipe fitted completely round-and following the contour of--

page_text: the opening through the tuyere of a cupola and a series of apertures in said steam
pipe arranged in suchwise as to produce a ring of steam jets in the tuyere which
will converge in the path of the air blast through the tuyere substantially as and
for the purposes described and illustrated in the drawings hereunto annexed.
Dated this 4th day of November 1900
TONGUE & BIRKBECK,
31, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.