IM- PROVEMENTS IN EFFECTING THE ELIMINATION OF THE METALLOIDS IN IRON ORES AND CAST IRON
Year: 1879

page_text: LETTERS PATENT to John Clayton Mewburn, of 169, Fleet Street, in the City
of London, Patent Agent and Consulting Engineer, for the Invention of " IM-
PROVEMENTS IN EFFECTING THE ELIMINATION OF THE METALLOIDS IN IRON
ORES AND CAST IRON." A communication from abroad by Le Comte Charles
De Montblanc and Lucien Gaulard, Chemist, both of Paris, France.
PROVISIONAL SPECIFICATION left by the said John Clayton Mewburn at
the Office of the Comunissioners of Patents on the 16th June 1879.
JOHN CLAYTON MEWBURN, of 169, Fleet Street, in the City of London, Patent
Agent and Consulting Engineer. "IMPROVEMENTS IN EFFECTING THE ELIMINATION
OF THE METALLOIDS IN IRON ORES AND CAST IRON." [A communication from
abroad by Le Comte Charles De Montblanc and Lucien Gaulard, Chemist, both of
Paris, France.]
The object of this Invention is to effect the elimination or removal of the
metalloids in iron ores and cast iron.
If a current of steam be passed over iron heated to redness the steam is
decomposed into oxygen, which becomes fixed on the iron, and into hydrogen; and
in consequence of its power of occlusion this latter gas filters, so to speak, through the
mass of the metal and penetrates all its pores. Under these conditions the hydrogen
which is in the nascent state combines with all the metalloids contained in the ores
or metal, especially with phosphorus, to form the gas (phosphoretted hydrogen),
which is eliminated in this state.
In order to apply this process or method to the dephosphoration of ores, and to
the elimination therefrom of the other metalloids, I fit in the axis of the tuyere of
the blast furnace or cupola a cone or nozzle for introducing steam, which enters
with the air blown in. The injection of the steam should be regulated by means of
a cock until the metalloids have been entirely eliminated, and the pressure of the
steam should be greater than that of the air discharged.
This Invention therefore consists essentially in the injection of steam with the
air blown in by the tuyere in order to eliminate sulphur, phosphorus, or other
metalloids in iron ores and cast iron:

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Clayton Mewburn in the Great Seal Patent Office on the
16th December 1879.
JOHN CLAYTON MEWBURN, of 169, Fleet Street, in the City of London, Patent
Agent and Consulting Engineer. "IMPROVEMENTS IN EFFECTING THE ELIMINATION
OF THE METALLOIDS IN IRON ORES AND CAST IRON." A communication from
abroad by Le Comte Charles De Montblanc and Lucien Gaulard, Chemist, both of
Paris, France.
The object of this Invention is to effect the elimination or removal of the
metalloids in iron ores and cast iron.
If a current of steam be passed over iron heated to redness the steam is
decomposed into oxygen, which is fixed on the iron, and into hydrogen; and in
consequence of its power of occlusion this last gas filters, so to say, through the
mass of the metal and penetrates all its pores.
Under these conditions the hydrogen which is found in the nascent state is com-
bined with all the metalloids contained in the ores, especially with phosphorus, for
forming the gas (phosphoretted hydrogen) which is eliminated in this state.
For the application of this process to the dephosphoration of ores, and also to the
elimination of all the other metalloids, there is fitted into the axis of the tuyere of
the blast furnace or cupola a cone or nozzle for the introduction of steam, which
enters with the air blown in. The injection of the steam should be regulated by
means of a cock until the complete elimination of the metalloids, and the pressure
of this steam should be geater than that of the air flowing back.
Having now described and particularly ascertained the nature of the said
Invention, and the manner in which the same is or may be used or carried into
effect, I would observe in conclusion that what is claimed as the Invention secured
to me by the hereinbefore in part recited Letters Patent is,-
The use of steam injected with the air blown in through the tuyere for the
elimination of sulphur, phosphorous, and other metalloids in iron ores and cast iron,
substantially as herein before described.
In witness whereof, I, the said John Clayton Mewburn, have hereunto set my
hand and seal, this Sixteenth day of December, in the year of our Lord
One thousand eight hundred and seventy nine.