Improvements in Regenerative Furnaces.
Year: 1893

page_text: Date of Application, 7th Feb., 1893-Accepted, 11th Mar., 1893
COMPLETE SPECIFICATION.
Improvements in Regenerative Furnaces.
I, RICHARD DIETRICH of Concordiahütte, near Bendorf on the Rhine, in the
German Empire, Engineer, do hereby declare the nature of this invention, and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention consists in an arrangement of the gas generators of regenerative
furnaces in conjunction with the suppression of the air regenerators thereof and in
the provision of a jointless furnace head formed by the ramming or stamping in of
a finely ground fire proof material.
Referring to the accompanying drawing the furnace head, that is to say, that
part A, B, C, D, of the furnace in which the flues are located has hitherto been
built up of brick, the joints or crevices in which frequently injuriously affect the
head part and the whole furnace. In constructing the jointless furnace head
according to this invention, the flues preferably of circular or elliptical cross section
are formed by lining pieces or pipes such as A or by brickwork. Any suitable
material sufficiently fire resisting to withstand the temperature of the furnace may
be used to form the furnace head but I prefer a mixture of chrome ore with
magnesite and from 3 to 5 per cent. of Martin furnace slag. This mixture finely
ground has added to it so much tar as will just allow of it being rammed or stamped
down. Before the lining A which is made of fire resisting material is melted or
burnt out the rammed mass becomes set hard. A furnace head of this kind is
more durable than one of brickwork because it is without joints. Further in the
furnace of this invention there are not four regenerators, as hitherto usual, but only
two, these being gas. regenerators. In the flue A-the air flue-there is entered
the gas flue R in the form of an exchangeable fire clay pipe, so that the air passing
into the furnace plays round the gas pipe and round the gas. In this way there is
an intimate mixing together of the gas and air and a short hot flame produced.
Upon the introduction of the air in a cold state as is the case with the suppression
of the air regenerators, the air entering round the gas flue operates to keep this
latter cool and prevent it from burning away. The air valve is done away with.
In its place flaps K are provided. These allow of the regulation of the admission
of cold air through a passage L into each separate air flue and into the furnace.
The admission of gas is regulated by means of a plug or valve arrangement S applied
to each flue. Tis the gas passage.
This construction of furnace is extremely simple, all the parts are readily accessible
and well cooled and any of the parts may be repaired without much interruption of
working.
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 regenerative furnaces the arrangement of a rammed or stamped jointless
furnace head composed of finely ground fire proof material in combination with fire
proof flue linings, for the purpose specified substantially as described and shewn.
2. The construction of regenerative furnaces without air regenerators in com-
bination with the arrangement in each flue of regulable air and gas passages
substantially as described and shewn.
3. In regenerative furnaces the arrangement of the gas conduit in the air flue in
such a way that the entering compressed or uncompressed air plays round the gas

page_text: and at the same time cools the exchangeable gas supply pipe, substantially as
described and shewn.
Dated this '7th day of February 1893.
CAPITAINE & VON HERTLING,
89, Chancery Lane, London, W.C., Agents for the Applicant.