Improvements in the Construction of Steel Smelting Furnaces.
Year: 1891

page_text: Date of Application, 14th Aug., 1891
Complete Specification Left, 16th May, 1892-Accepted, 2nd July, 1892
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Steel Smelting Furnaces.
We, MAXIMILIAN MANNABERG Metallurgist and JOSEPH CLIFF, Managing
Partner, both of the Frodingham Iron and Steel Works, Frodingham in the
County of Lincoln, do hereby declare the nature of this invention to be as
follows:-
--
The invention has for its object improvements in the construction of steel
smelting furnaces of the class called regenerating furnaces whereby the regene-
rators can be repaired without interfering with or injuring the furnace, the furnace
can expand and contract without injuring the regenerators and the possibility of
the air and gas mixing in their passage to the furnace is reduced to a minimum.
For this purpose we support the hearth of the furnace on girders carried by
columns instead of as heretofore supporting it on brickwork above the roofs of the
regenerators, and we build the air and gas regenerators, and their inlet and outlet
passages in pairs on each side of the free space left underneath the furnace; the
main air and gas regenerators and the channels leading into the same occupy the
lowest part of the brickwork, and the inlet channels are fitted with valves as usual
whereby the direction of the air and gases can be reversed at will. The main gas
regenerator is preferably arranged with its length at right angles with that of the
main air regenerator and the said main gas regenerator communicates with a
supplemental gas chainber or regenerator at a slightly higher level; the passages
from the air and gas regenerators to the furnace are mainly vertical, they are
parallel with each other, and they lead at their upper ends into short flues or
passages opening into the furnace and constructed at different levels.
The bed of the furnace is at its sides supported also on girders carried by the
brickwork and immediately above such side girders are cold air tubes or channels.
The bed of the furnace can be freely inspected from below and the air and gas flues
being completely independent from and not crossing each other as is generally the
case there is less probability of leakage from the one to the other and the brick-
work is more easily built and repaired.
COMPLETE SPECIFICATION.
Improvements in the Construction of Steel Smelting Furnaces.
We, MAXIMILIAN MANNABERG, Metallurgist, and JOSEPH CLIFF, Managing
Partner, both of the Frodingham Iron and Steel Works, Frodingham, in the
County of Lincoln, 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 invention has for its object improvements in the construction of steel
smelting furnaces of the class called regenerating furnaces, whereby the regene-
rators can be repaired without interfering with or injuring the furnace, the furnace
can expand and contract without injuring the regenerators, and the possibility of
the air and gas mixing in their passage to the furnace is reduced to a minimum.
For this purpose we support the hearth of the furnace on girders carried by

page_text: columns, instead of, as heretofore, supporting it on brickwork above the roofs of
the regenerators, and we build the air and gas regenerators and their inlet and
outlet passages in pairs on each side of the free space left underneath the furnace ;
the main air and gas regenerators and the channels leading into the same, occupy
the lowest part of the brickwork, and the inlet channels are fitted with valves as
usual, whereby the direction of the air and gases can be reversed at will. The
main gas regenerator is preferably arranged with its length at right angles with
that of the main air regenerator, and the said main gas regenerator, communicates
with a supplemental gas chamber or regenerator at a slightly higher level..
This supplemental gas chamber receives all dirt, slag, etc.,, is free of chequer
bricks, can very easily be cleaned, and protects in that way the main gas regene-
rator. The passages from the air and gas regenerators to the furnace are mainly
vertical, they are parallel with each other, and they lead at their upper ends into
short flues or passages opening into the furnace and constructed at different
levels.
The bed of the furnace is at its sides supported also on girders carried by the
brickwork, and immediately above such side girders, are cold air tubes or cliannels.
The bed of the furnace can be freely inspected from below, and the air and gas
flues, being completely independent from and not crossing each other, as is
generally the case, there is less probability of leakage from the one to the other,
the partition wall of the regenerators is not weakened, and the brickwork is more
easily built and repaired.
And in order that our said invention may be more clearly understood and readily
carried into effect, we will proceed, aided by the accompanying drawings, more
fully to describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure is a cross section, drawn on the line 1-1 of Figure 2, of a steel
smelting furnace constructed according to our invention.
Figure 2 is a horizontal section of the same drawn on the line 2-2 of Figure 1.
Figure 3 is a horizontal section drawn on the line 3-3 of Figure 1.
Figure 4 is a vertical section of parts drawn on the line 4-4 of Figure 1, and
Figure 5 is a vertical section of parts drawn on the line 5-5 of Figure 1.
In all the figures like parts are indicated by similar letters of reference.
a is the hearth of the furnace, which we support on girders & carried by columns.c,
instead of, as heretofore, supporting it on brickwork above the roofs of the regene-
rators. a a are the charging doors, and a² are openings for examining the wall on
the charging side, and a³ is the tapping hole. A free space is left underneath
the furnace bottom, and on each side of such free space we build the air and gas
regenerators e and and their inlet passages e, and outlet passages e² 2, in
pairs. The main air and gas regenerators ef and the channels ef leading into
the same, occupy the lowest part of the brickwork, and the inlet channels are fitted
with valves ef, as usual; whereby the direction of the air and gases can be
reversed. at will. The main gas regenerator is preferably arranged with its
length at right angles with that of the main air regenerator e, thereby obtaining a
convenient arrangement, and the main gas regenerator f communicates with the
supplemental gas chamber or regenerator *, which latter is built at a slightly
higher level, and is easily cleaned through manhole m. The passages from
the air and gas regenerators to the furnace are mainly vertical, they are parallel
with each other, and the arrangement of the regenerators enables to construct them
in such way that they do not cross each other and do not weaken the partition walls
of the regenerators, and they terminate at the upper ends in short inclined, flues: or
passages opening into the furnace and constructed at different levels. The bed aof
the furnace is at its sides supported also on girders gy carried by the brick work,
and immediately. above such side girders gg, are cold air tubes or channels h h.
By the construction of furnace above described, the, bed of the furnace can be

page_text: freely inspected from below, and the air and gas flues, being completely inde-
pendent from and not crossing each other as is generally the case, there is less
probability of leakage from the one to the other, and the brickwork is more
easily built and repaired.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that
what we claim is :-
1. The improved construction of steel smelting furnace, substantially as herein
shown and described.
2. In steel smelting furnaces, a bed supported on cross girders carried by
columns, and by side girders carried by the brickwork, and a free space under-
neath said bed to facilitate inspection thereof, substantially as herein shown and
described.
3. In steel smelting furnaces, the air and gas regenerators, constructed in pairs,
and a supplemental gas chamber, all in one block of brickwork, on, each side of a
free space below the furnace bottom, and communicating with the furnace by flues
or passages, which are mainly vertical, are parallel with and do not cross each
other, and at their upper ends lead into the furnace by short flues, substantially as
herein shown and described.
4. The arrangement of the regenerators with vertical axis at right angles to
each other, and a supplemental gas chamber where all dirt and slag accumulate
without entering and spoiling the main gas regenerator.
Dated this 16th day of May 1892.
MAXIMILIAN MANNABERG,
JOSEPH CLIFF,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.