Improvements in the Construction and Working of Blast Furnaces and Cupolas.
Year: 1899

page_text: Date of Application, 8th Mar., 1899
Complete Specification Left, 7th Dec., 1899-Accepted, 27th Jan., 1900
PROVISIONAL SPECIFICATION.
Improvements in the Construction and Working of Blast Furnaces
and Cupolas.
I, ARTHUR JAMES HENDERSON, of No. 60, Queen Victoria Street, in the County
of London, Civil Engineer, do hereby declare the nature of this invention to be
as follows:-
In employing blast furnaces and cupolas for smelting and melting metal, the
charge is to a large extent supported by the fuel that is mingled with it, but the
presence of this fuel is often objectionable owing to the impurities which the
metal receives from it. Attempts have therefore been made to work blast fur-
naces and cupolas with gaseous fuel, such as producer gas, water gas, or oil
vapour and air, but the application of this fuel at the bottom of the furnace is
difficult owing to the fact that there is nothing to support the charge.
My invention relates to means of overcoming this difficulty, which I do by
fixing at a suitable distance above the tuyeres or inlets for the gaseous fuel a
perforated arch or floor of refractory material which supports the charge but
allows the molten metal to descend through it to the well below. I prefer to
make above the well a comparatively narrow opening through which the flame
passes upwards and above this opening to taper the interior to a considerably.
larger diameter where it is spanned by the arch or floor.
Dated this 8th day of March 1899.
ABEL & IMRAY,
Agents for the Applicant.
Improvements in the Construction and Working of Blast Furnaces
and Cupolas.
I, ARTHUR JAMES HENDERSON, of No. 60, Queen Victoria Street, in the County
of London, Civil 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:
-
In employing blast furnaces and cupolas for smelting and melting metal, the
charge to a large extent supported by the fuel that is mingled with it, but the
presence of this fuel is often objectionable owing to the impurities which the
metal receives from it. Attempts have therefore been made to work blast fur-
naces and cupolas with gaseous fuel, such as producer gas, water gas, or oil
vapour and air, but the application of this fuel at the bottom of the furnace is
difficult owing to the fact that there is nothing to support the charge.
Price 81

page_text: My invention relates to means of overcoming this difficulty, which I do by
fixing at a suitable distance above the tuyeres or inlets for the gaseous fuel a
perforated arch or floor of refractory material which supports the charge but
allows the molten metal to descend through it to the well below. I prefer to
make above the well a comparatively narrow opening through which the flame
passes upwards and above this opening to taper the interior to a considerably
larger, diameter where it is spanned by the arch or Hoor.
Fig. 1 of the accompanying drawings is a vertical section of a cupola or blast
furnace according to my invention.
Figs. 2 and 3 are part sections, part elevations, and Fig. 4 is a section of
several forms of the perforated arch or floor of which Fig. 5 is a plan.
a is the well in which the molten material collects and from which it is dis-
charged through the tap hole b. By tuyeres (of which there may be a number
around the well, combustible gas or vapour and air are blown in, and just above
their inner mouths there is a contracted neck d above which the lining tapers
to a large diameter, its conical interior forming a seat for the perforated deck
or floor e of refractory material, which supports the charge of metal or of ore
and flux or other material occupying the upper part ƒ of the furnace.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what 1
claim is:
-
1. The herein described method of working a cupola or blast furnace hy
blowing combustible gas or vapour and air into a well below a perforated arch
or floor which supports the charge of material to be fused or smelted and through
which the molten material can flow to the well below.
2. A cupola or blast furnace constructed with well, tuyeres, narrow neck and
perforated arch or floor substantially as and for the purpose set forth.
Dated this 7th day of December 1899.
ABEL & IMRAY,
Agents for the Applicant.