Improvements in Apparatus for Controlling the Air Inlets in Blast Furnaces and the like.
Year: 1898

page_text: Date of Application, 4th June, 1898-Accepted, 9th July, 1808
COMPLETE SPECIFICATION
Improvements in Apparatus for Controlling the Air Inlets in Blast
Furnaces and the like.
I, PAUL BENNI, Mechanical Engineer and Manager of the Blast Furnaces,
Ostrowiec, in the Government of Radom, Russian Empire, 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 present invention relates to an apparatus for the regulation of the area
of fee inlet in air tubes for furnaces.
The apparatus obviates very considerable inconvenience because as 18 well
known the alteration of the area of the blast inlets is necessary at intervals vary-
ing from twice monthly to once weekly, in order to secure the regularly satis-
factory operation of the blast furnace.
This operation 18 under the present conditions namely, the changing of the
cast on lining only attainable by stopping the blast furnace for from half an
hour to two hours. This stoppage, however, again causes uregulanty in the
working of the blast furnace, and consequently the reduction in the production
On this account the frequent alteration of the inlet area 18 often omitted, and
the importance of it disputed
My invention remedies all the diaw-backs and renders necessary neither >>
stoppage of the blast furnace nor any inconveniences in the operation, because
the alteration can be effected without difficulty by hand.
Referring to the accompanying drawing
Figure 1 shows the apparatus as constructed for blast furnaces, in section, and
Figure 2 18 a sectional view of the regulating device
Its
In the nozzle F of the blast furnace tuyere of ordinary construction, is placed
a hollow ng R. This ring 18 provided with the tubes r and r, which pass
through the cover D of the inlet, and serve to convey water to the ring R This
water flows through the tube of the R into the hollow of the ring, and flows out
through the tube r¹ The ring R with its tubes r and can be adjusted in the
nozzle of the tuyere, and can be moved backwards or forwards as desired
outside diameter 18 equal to the smallest internal diameter of the conical tuyere
nozzle, and consequently the ring when in the end position shown in the draw-
ing, will fill the nozzle and there will remain as free aperture for the blast only
the opening of the ring If, however, the ring 18 drawn further back, as for
instance, into the position shown in dotted lines in the drawing, the free area
of inlet for the blast will be increased by the amount of the space between the
inside of the nozzle and the outer periphery of the hollow ring This surface is
the greater the further the ring is drawn back, and can be altered from zero to a
maximum, which latte 18 substantially indicated by the position of the ring
shown in dotted lines, the said ring R being moved backwards or forwards by
means of the water tubes
The total area of free inlet corresponding to each position of the hollow ring,
is shown on a scale which is attached to the tuber near the covering lid D.

page_text: 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 18 —
1. The improved apparatus for regulating the area of free inlet in air inlets
for blast furnaces, characterized by the arrangement that by the displacement of
a body of any convenient shape, such as a hollow ring filled with water in
conical or pyramidal part of the tube such as the tuyere, any required area of
inlet can be obtained, substantially as described
a
2. A modification of the apparatus set forth in Claim 1, devised especially for
blast furnaces, and characterized by the arrangement that the insertion piece of
suitable shape cooled by constant cuculation of water, and inserted in the tuyere,
can be actuated from the outside without involving any stoppage of the blast
furnace, constructed substantially as and for the purpose set forth, and illustrated
in the accompanying drawing.
Dated the Fourth day of June 1898
W. P THOMPSON & Co,
322, High Holborn, London, WC, Patent Agents for the Applicant.