Improvements in the Burning of Pressed Blocks of Purple Ore, and in Apparatus or Kilns therefor.
Year: 1891

page_text: Date of Application, 11th Sept., 1891
Complete Specification Left, 11th Mar., 1892-Accepted. 16th Apr., 1992
PROVISIONAL SPECIFICATION.
Improvements in the Burning of Pressed Blocks of Purple Ore, and
in Apparatus or Kilns therefor.
We, THEODOR HEINRICH JOHANN ESKUCHEN and HERMANN AUGUST
HAARMANN, both of the Georgs-Marien Bergwerks und Hütten, Osnabrück, in
the Empire of Germany, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the burning of pressed blocks of purple ore and it
consists in burning such blocks with or without the admixture of other materials in
a chamber of a kiln provided with grate firing and gas-firing arrangements, the
gases from the grate fire being first employed for drying the briquettes, and the
hot gases from the gas firing being afterwards allowed to pass through the kiln
chamber in conjunction with the gases from the grate firing, for the purpose of
obtaining a farther development of heat.
The grate is situated at one end of the kiln chamber and gas-channels are
arranged underneath the chamber in such a manner that the combustible gases
(blast furnace gases or the like) after ignition pass into the central channel and
then through transverse channels at the other end of the kiln into the side channels
in a reverse direction and behind the grate. The said gases then pass into the
kiln chamber through suitable openings and traverse the kiln chamber in
conjunction with the gases of the grate or coke fire before passing into the
chimney.
Dated the 11th day of September 1891
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in the Burning of Pressed Blocks of Purple Ore, and
in Apparatus or Kilns therefor.
We, THEODOR HEINRICH JOHANN ESKUCHEN and HERMANN AUgust
HAARMANN, both of the Georgs-Marien Bergwerks und Hüttenverein, Osnabrück,
in the Empire of Germany, 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 relates to the burning of pressed blocks of purple ore.
According to our invention the pressed blocks of purple ore, with or without the
admixture of other materials, are without farther drying. after pressing, burnt in a
kiln which is so constructed that both hearth or coke firing and gas firing can be
made to act upon the pressed blocks. After the insertion of the pressed blocks,
the latter are first of all dried by a slow fire upon the hearth, the combustible gases
are then ignited and led through suitably arranged channels, in order to be
conducted through the chamber of the kiln, which is filled with pressed blocks, in
conjunction with the gases from the hearth fire, to produce a continuously high
degree of heat.
To enable our invention to be fully understood we will describe how it can be
carried into practice by reference to the accompanying drawing in which :-
Figure 1 is a vertical transverse section of a furnace or kiln for burning pressed
blocks of purple ore according to our invention.

page_text: Figure 2 is a longitudinal section, and
Figure 3 is a horizontal section of the same.
The chamber A of the kiln or furnace, which is intended to receive the briquettes
of purple ore is suitably arched and of oblong shape. The front end of the furnace
is provided with fire bars B, Figure 3, for coke firing, and the gases of combustion 5
flow through several longitudinal channels C, Figures 1 and 2. placed under the
chamber A of the kiln, before they can gain access to the chamber A which
contains the briquettes. From thence they finally pass through the chimney D,
Figures 1 and 2, which is constructed at the opposite end to that at which the
grate is situated.
For the purpose of driving ont the moisture contained in the briquettes a small
fire is preferably lighted in the grate B provided at the front of the kiln in front
of the two side channels or flues C. When the moisture is driven out of the
briquettes, combustible gases (blast furnace gases or other similar ones) are admitted
at E, Figures 2 and 3, into the middle longitudinal channel or flue C the air 1
necessary for supporting combustion being also admitted at the same time. The
burning gases pass-through transverse channels or flues F, Figures 2 and 3, at
the end of the middle longitudinal channel or flue C into the two side channels or
flues C parallel with it, and pass through these towards the end of the kiln at which
the grates for the coke-firing are situated; the channels or flues C are separated 2
from the latter by transverse walls G immediately behind the grates as shewn in
Figures 2 and 3.
The burning gases rise vertically immediately in front of these transverse walls G
through the openings H, obtain access to the chamber A of the kiln, containing
the briquettes of purple ore, and passing between the latter in conjunction with the 2
combustible gases of the coke fire in the same direction they passed before, through
the middle channel or flue C, through the openings I, and then they pass downwards
in the chimney D toward the flue. The conduction of the gases and the stoking
of the coke fire are not interrupted when the briquettes have attained a bright
red heat, but continued until the whole of the briquettes forming the charge are 3
burnt, that is to say, after the burning has been continued for several days.
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 burning of briquettes of purple ore in a chamber of a kiln provided with g
grate firing and gas-firing arrangements, the gases from the grate fire being first
employed for drying the briquettes, and the hot gases from the gas firing being
afterwards allowed to pass through the kiln chamber in conjunction with the gases
from the grate firing, for the purpose of obtaining a farther development of heat,
substantially as set forth.
2. The use for burning pressed blocks of purple ore of a kiln comprising a grate
situated at one end of a kiln chamber and gas-channels arranged underneath the
chamber in such a manner that combustible gases (blast furnace gases or the like)
introduced therein pass, after ignition into the central channel and then through
transverse channels at the other end of the kiln into the side channels through
which they pass in a reverse direction to the back of the grate the said gases then
passing into the kiln chamber through suitable openings and traversing the kilu
chamber in conjunction with the gases of the grate or coke fire before passing into
the chimney, substantially as hereinbefore described and illustrated in the accom-
panying drawing.