A NEW AND IMPROVED PROCESS FOR BURNING MAGNESIAN OR OTHER LIME STONE
Year: 1879

page_text: LETTERS PATENT to Friedrich Carl Glaser, of 92, Lindenstrasse, Berlin, in the
Kingdom of Prussia, and Empire of Germany, Engineer and Patent Agent, for
the invention of "A NEW AND IMPROVED PROCESS FOR BURNING MAGNESIAN
OR OTHER LIME STONE." A communication from the Vereinigte Koenigs
& Laurahuette (United Kings and Laura Iron Works), Berlin, Prussia,
Germany
Sealed the 14th May 1880, and dated the 28th November 1879.
PROVISIONAL SPECIFICATION left by the said Friedrich Carl Glaser at the
Office of the Commissioners of Patents on the 28th November 1879.
FRIEDRICH CARL GLASER, of 92, Lindenstrasse, Berlin, in the Kingdom of
Prussia, and Empire of Germany, Engineer and Patent Agent. "A. NEW AND
IMPROVED PROCESS FOR BURNING MAGNESIAN OR OTHER LIMESTONE," A communi-
cation from the Vereinigte Koenigs & Laurahuette (United Kings and Laura
Iron Works,) Berlin, Prussia, Germany.
In order to burn limestone to such a high degree as to render it either not
slakeable at all, or only slakeable with difficulty in water, and so that it does not
break up on exposure to the air, thereby producing what may be termed a dead
burnt lime, an intense white glowing heat during several consecutive days is
necessary. The heat it is possible to obtain in the present ordinary kilus or
furnaces is however insufficient to suitably burn special cleaner or purer kinds of
limestone.
In order to dead burn the cleaner or purer kinds of lime itself, and in a short
time, I employ pure oxygen, or oxygen containing only some per centage of
nitrogen.
The process is as follows:-
The furnace or kiln of any construction, but fired by gas, intended for dead
burning the line is lined with lime bricks, or the lining is made by stamping
in lime.
To the coal gas obtained at the gas works is, in addition to the atmospheric air,
added pure oxygen, or oxygen containing only some percentage of nitrogen, by
which means a considerably more perfect combustion of the carbon, and a heat
increased to the highest degree, is obtained.
By this method it is practicable to dead burn pure limestone itself in a short
time.
The same object may also be attained by burning hydrogen gas in a furnace or
kiln.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Friedrich Carl Glaser in the Great Seal Patent Office on the 21st
May 1880.
FRIEDRICH CARL GLASER, of 92, Lindenstrasse, Berlin, in the Kingdom of
Prussia, and Empire of Germany, Engineer and Patent Agent. "A NEW AND
IMPROVED PROCESS FOR BURNING MAGNESIAN OR OTHER LIMESTONE." A communi-
cation from the Vereinigte Koenigs & Laurahuette (United Kings and Laura Iron
Works), Berlin, Prussia, Germany.
In order to burn limestone to such a high degree that it presents a perfectly
black fracture, and is either not slakeable at all, or only slakeable with difficulty in
water, and so that it does not break upon exposure to the air, thereby producing
what may be termed a dead burnt lime, an intense white glowing heat during
several consecutive days is necessary. The heat it is possible to obtain in the
present ordinary kilns or furnaces is however insufficient to suitably burn special
cleaner or purer kinds of limestone.
In order to dead burn the cleaner or purer kinds of lime itself, and in a
short time, I employ pure oxygen, or oxygen containing only some per centage of
nitrogen.
The process is as follows:-
The furnace or kila of any construction, but fired by gas, intended for dead
burning the lime is lined with lime bricks, or the lining is made by stamping in
lime.
To the coal gas which has arrived in the burning chamber I add, in addition to
the atmospheric air, pure oxygen, or oxygen containing only a per centage of
nitrogen, by which means a considerably more perfect combustion of the carbon,
and a heat increased to the highest degree, is obtained.
By this method it is practicable to dead burn pure limestone itself in a short
time.
The same object may also be attained by burning hydrogen gas in a furnace or
kiln with the aid of heated air.
Having now described and ascertained the nature of the Invention, communi-
cated to me as aforesaid, and in what manner the same is or may be performed,
what
I claim as secured to me by the hereinbefore in part recited Letters Patent is,-
The use of oxygen or hydrogen gas for the dead burning of magnesian or other
limestone, substantially as hereinbefore specified.
In witness whereof, I, the said Friedrich Carl Glaser, have hereunto set my
hand and seal, this Eighteenth day of May, in the year of our Lord One
thousand eight hundred and eighty.
F. C. GLASER. (L.S.)