MANUFACTURE OF IRON AND STEEL
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
We, FREDERICK SIEMENS of N° 12 Queen Anne's Gate Westminster in the
County of Middlesex, Engineer, and JOSEPH GORDON GORDON of Landore in tho
County of Glamorgan Steel Manufacturer do hereby declare the nature of the said
invention for "MANUFACTURE OF IRON AND STEEL" to be as follows:-
This invention relates to a process for manufacturing iron and steel, which is
effected in the following manner. In the bed of a regenerativo gas furnace pig
iron is melted to form a bath. Into this bath is introduced an intimate mixture
of iron ore with carbonaceous or fluxing materials and the heat is raised to a very
high point. The ore becomes reduced and the metal resulting from it mixes with
the molten pig iron producing a metal which may be made to contain more or less
per centage of carbon so as to constitute steel of a less or greater degree of
mildness, the most mild condition being practically undistinguishable from that of
malleable iron. The mixture of ore with reducing and fluxing ingredients may
before its introduction into the bath be made up into lumps with tar or other
suitable agglutinating materials. Or the mixture may be introduced in its
pulverulent form by charging it into a skip that can be canted over or have its
bottom opened within the furnace so as to discharge its contents into the bath.
The skip may itself bo left in the bath to melt down with the other materials.

page_text: COMPLETE SPECIFICATION.
"
WC, FREDERICK SIEMENS of No: 12 Queen Anne's Gate Westminster, in the
county of Middlesex, Engineer, and JOSEPH GORDON GORDON of Landore in the
county of Glamorgan, Steel Manufacturer do hereby declare the nature of our
invention for "MANUFACTURE OF IRON AND STEEL" and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement :-
This invention relates to a process for manufacturing iron and steel, which is
effected in the following manner. In the bed of a regenerative gas furnace, pig
iron with or without addition of scrap is melted to form a bath of molten metal.
Into this bath is introduced an intimate mixture of iron ore with carbonaceous
and fluxing materials and the heat is raised to a very high point. The ore becomes
reduced and the metal resulting from it mixes with the molten pig iron producing
a metal which may be mado to contain more or less percentage of carbon so as to
constitute steel of a less or greater degree of mildness, the most mild condition
being practically undistinguishable from that of malleable iron.
The admixture of ore with reducing and fluxing ingredients may before its
introduction into the bath be made up into lumps with tar or other suitable
agglomerating materials. Or the mixture may be introduced in its pulverulent
form by charging it into a skip that can be canted over or have its bottom opened
within the furnace so as to discharge its contents into the bath. The skip may
itself be left in the bath to melt down with the other materials.
The heat is to be carried to such a point and maintained until the slag and
metal are completely fused and may be tapped off. The inetal may then be
treated in the usual way. It may be more or less decarbonated if desired by
addition of oro or by blowing air through it, and it may have added to it ferro-
manganese, and other materials such as are employed in the production of steel.
In cases where the addition of manganese chromium and the like is desired, a
proportion or ores or salts of these metals, may be, in the first instance mixed with
the batch.
Having now particularly described and ascertained the nature of our invention
and in what manner the same is to be performed we declare that what we claim is
The berein described process for manufacturing steel by subjecting an admixture
of iron ore with carbonaceous and fluxing materials in a bath of molten metal to
the heat of a furnace flame of such intensity that the metal and slag are melted to
a fluid condition and separate by gravity.
'