Year: 1888

page_text: I, WILLIAM EVANS, of Llwyncelyn House, Merthyr Tydvil, in the County of
Glamorgan, Manager of Iron and Steel Works do hereby declare the nature of this
invention to be as follows :-
This invention has for its object to effect an increase in the output of metal and to
prolong the life of the furnace. To this end there is provided in addition to the usual
arrangement of twyeres opening into the lower portion of the furnace, an additional
range of twyeres opening into the furnace at a considerable height above the level of
the twyeres now in general use, preferably about 8 to 10 feet below that point called
the bosh. These twyeres are provided with casings and water blocks and are supplied
with blast and water from suitable mains. Each twyere is furnished with a valve for
shutting off the blast when desired, and each water block is provided with a stop cock.
The upper or additional twyeres are operated from a platform carried on brackets
arranged at a convenient height around the furnace and are or may be similar to the
existing bottom range of twyeres now in general use.
In a furnace arranged according to this invention a large yield may be obtained
with a moderate pressure of blast and injury to the furnace lining due to excessive
pressure of blast is avoided. Furthermore "Scaffolding" is obviated so that the
furnace can be worked with great regularity, whereby there is obtained a less pro-
portion of inferior iron and a greater proportion of iron fit for direct conversion into
steel. The increased output will reduce the fixed charges per ton of metal produced
and thus effect a great economy.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Blast Furnaces.
I, WILLIAM EVANS, of Llwyncelyn House, Merthyr Tydvil, in the County of
Glamorgan, Manager of Iron and Steel Works, 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 invention has for its object to effect an increase in the output of metal from
and to prolong the life of blast furnaces. To this end there is provided in addition to
the usual arrangement of tuyeres opening into the lower portion of the furnace, an
additional range or set of tuyeres opening into the furnace at a considerable height
above the level of the tuyeres now in general use and preferably about eight to ten
feet below the "boshes" of the furnace. These additional tuyeres are provided with
casings and water blocks and are supplied with blast and water from suitable mains.
Each tuyere is furnished with a valve for shutting off the blast when desired and each
water block is provided with a stop cock. The upper or additional tuyeres are
operated from a platform carried on brackets arranged at a convenient height around
the furnace and are or may be similar to the existing bottom range of tuyeres now in
general use.
In the accompanying four sheets of illustrative drawings
Fig. 1 is a vertical section of one half of a blast furnace provided with an additional
range or set of tuyeres according to this invention.
Fig. 2 is a horizontal section in the line A B Fig. 1 shewing half of the
furnace.
Fig. 3 is a detail view hereinafter referred to.
Fig. 4 is a front elevation of the end furnace of a group of blast furnaces provided
with the additional tnyeres.
Fig. 5 is a horizontal section in the line E F of Fig. 4.
In Figs. 4 and 5 only one furnace is shewn but it is to be understood that the other
furnaces of the group are similar to the one shewn.
1,1 are the ordinary tuyeres opening into the lower portion of the furnace as
shewn and through each of which an air blast passes from an air main 2 in the
ordinary manner. 3, 3 are the additional tuyeres that open into the furnace at a
considerable height above the level of the tuyeres 1 and which may as hereinbefore
stated be advantageously placed about eight or ten feet below the "boshes" 4 of the
furnace as shewn in fig. 1.
These additional tuyeres 3 are like the ordinary tuyeres furnished with water
casings 5 and water blocks 6 and are supplied with blast from an additional air main 7
that is fed from the blast main 8.
The water casings and blocks are supplied with water from a water main 9 fed
from any suitable source a suitably arranged stop cock being provided for shutting
off or controlling the water supply...

page_text: The goose neck 10 for conveying air to each tuyere 3 is provided with a valve
at 10 for shutting off or controlling the blast to such tuyero.
11 is a platform carried by brackets 12, one of which is separately shewn in Fig. 3.
This platform is so situated that the valves for controlling the supply of air and water
to the additional tuyeres, water casings, and blocks, can be readily manipulated as
desired.
In a furnace constructed with an additional range or set of tuyeres as described, a
large yield may be obtained with a moderate pressure of blast, injury to the furnace
lining, caused by excessive pressure of blast being thereby avoided.
Furthermore "scaffolding" is obviated so that the furnace can be worked with
great regularity whereby there is obtained a less proportion of inferior iron, and a
greater proportion of iron fit for direct conversion into steel. The increased output
of the furnace will reduce the fixed charges per ton of metal produced and thus effect
considerable economy as compared with furnaces constructed with one set of tuyeres
in the ordinary manner.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is-
Providing a blast furnace with two sets of tuyeres the one set arranged in relation
to the other set substantially in the manner hereinabove described with reference to
and illustrated in the drawings annexed for the purposes specified.
Dated this 12th day of January 1003.
WILLIAM EVANS.
W. Lloyd Wise,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.