Improvements in Metallurgical Furnaces.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Metallurgical Furnaces.
I, GEORGE. PLATT, of the Firm of Samuel Platt, of King's Hill Foundry,
Wednesbury in the County of Stafford, Engineer, do hereby declare the nature of
this invention to be as follows:-
This invention has reference to those metallurgical furnaces which are used for
the purpose of annealing and drying tubes, rods, bars, sheets, and other articles by
means of heated gases arising from the fire and passing along forward and backward:
flues or chambers before entering the escape flue.
In carrying, out my invention I make the fire grate either with the door at the
side or at the end of the furnace and leading at right angles therefrom and parallel.
to each other are two flues running the length of the furnace. From the ends of
the said flues farthest away from the fire grate I provide one or more passages,
leading to an annealing chamber the said annealing chamber being just above the
two flues and of a width to cover the same, the said annealing chamber terminating.
preferably over the fire grate with one or more upward passages to a flue which is
carried back along the centre of the furnace to the end farthest from the fire grate.
and then joining the escape flue. On each side of the said flue which leads from,
the annealing chamber are two parallel drying chambers the said chambers running
the length of the furnace. The ends of these drying chambers are provided with:
suitable doors through which the tubes rods, bars, sheets and other articles to be
dried are passed. The said annealing chamber is provided with a suitable door to
cover the mouth of the same and is provided with levers in any suitable way for
raising and lowering the said door.
In a modification of my invention instead of the gases passing through the said.
annealing chamber I make the said annealing chamber closed. In this case there:
are passages formed at the end of the flue farthest from the fire grate and leading.
into two, flues one on each side of the said closed annealing chamber. and from. the
ends of the said flues there are sloping passages leading to the centre flue, between
the aforesaid chambers..
In a further modification of my invention instead of supplying the gases as above..
described. I may use gases from a producer and in this case pass the same through
the fire.grate.
T
1+

page_text: Improvements in Metallurgical Furnaces.
I, GEORGE PLATT, of the Firm of Samuel Platt, of King's Hill Foundry,
Wednesbury, in the County of Stafford, 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:-
This invertion has reference to those metallurgical furnaces which are used for
annealing and drying seamless steel and other metal tubes, rods, bars, sheets and
other metal articles by means of heated gases passing along forward and backward
flues or chambers to the escape flue and this invention consists in combining and
arranging the flues and an annealing chamber and one or more drying stoves in
the manner herein described so that fuel is economised as the heated gases after
heating the annealing chamber pass upwardly and heat the drying stove or drying
stoves arranged on the top of the annealing chamber.
I will describe my invention by referring to the accompanying drawings on
which Fig. 1 is a cross section of a furnace constructed according to this invention;
Fig 2 is a longitudinal sectional elevation of the same but with the centre broken:
away to get the view on the drawing; and Fig. 3 is a cross sectional elevation of
a modified arrangement of my invention.
The same letters of reference indicate the same parts in all the figures of the
drawings.
=
In carrying out this invention I provide running all along underneath the
annealing chamber A two or more longitudinal flues B1 B2 through which the.
heated gases pass from the fire grate, which latter is arranged at one end of these
flues as indicated for instance at C in Fig. 2. The heated gases pass along the
Hues BB2 underneath the annealing chamber A and then rise up through openings b
at the end (see Fig. 2) and pass back along the annealing chamber A and then rise
up at d at the other end of the annealing chamber A and pass back along the flue D-
on the top of the annealing chamber A to the escape flue e. At each side of the
upper flue D and on the top of the annealing chamber A I provide two drying
stoves or chambers marked respectively F1 F2 which extend from end to end of the
annealing chamber A and are for the purpose of drying the metal tubes, rods, bars,
sheets or other articles. It will be seen that by arranging the drying chambers F1 F
on the top of the annealing chamber A 1 utilise a large percentage of the heat and
thus economise the fuel. The ends of the drying chambers F1 F2 and of the annealing.
chamber A are provided with the usual doors as will readily be understood.
The arrangement of the two drying chambers F1 F2 is very convenient when my
furnace is used for annealing and drying seamless steel tubes as the tubes which
have been pickled can be dried, say in the chamber F, and kept separate from
those tubes which have not been pickled and are being dried in the other
chamber F. The door of the drying chamber F is by preference arranged at
the opposite end to the door of the drying chamber F, so that the tubes can be
placed in and removed from the two drying chambers at opposite ends so that there
is no possibility of their getting mixed after they have been removed from the
drying stoves or chambers F F
It will be evident that instead of employing the one flue D and two drying
chambers FF on the top of the annealing chamber A I may, when greater heat
is required in the drying chamber, so construct the furnace that the passage D will
form the drying chamber, and the two passages F¹ F will form side flues along
which the heat passes from the annealing chamber to the escape flue.
When the annealing chamber A is required for close annealing and has to be

page_text: so arranged that the gases from the fire grate do not pass along the annealing
chamber, I provide, as shewn in Fig. 3, the two passages G G2 along the sides of
the annealing chamber A and along which the gases pass from the flues B1 B2 to the
upper flue or flues instead of passing through the annealing chamber A. These
flues G'G' extend right along the sides of the annealing chamber A as will readily
be understood.
It will be evident that instead of the heating gases being obtained from fuel
burning on the fire grate C, I may use heat from a gas producer and arrange the
flues and annealing furnace and drying chamber or chambers in any of the ways
above described with reference to the accompanying drawings.
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. In a combined annealing and drying furnace for seamless steel and other
metal tubes rods bars sheets and the like, arranging the drying chamber or drying
chambers immediately above the annealing chamber and with the flues so arranged
that the heat passes upwardly from the annealing chamber and heats the drying
chamber or drying chambers substantially as herein set forth.
2. In a combined annealing and drying furnace for seamless steel and other
metal tubes rods bars sheets and the like, the combination of the annealing
chamber and drying chamber or drying chambers and flues all arranged
substantially as herein before described with reference to Figs. 1 and 2 of the
accompanying drawings.
3. In a combined annealing and drying furnace for seamless steel and other
metal tubes rods bars sheets and the like, the combination of the annealing
chamber and drying chambers or drying chambers and flues all arranged
substantially as hereinbefore described with reference to Fig. 3 of the
accompanying drawings.
Dated this 5th dor of Santamber 1806
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.