PROCESS FOR REDUCTION OF IRON ORES AND PRODUCTION OF IRON AND STEEL
Year: 1884

page_text: FROVISIONAL 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 the
County of Glamorgan Steel Manufacturer do hereby declare the nature of the
said invention for "PROCESS FOR REDUCTION OF IRON ORES AND PRODUCTION OF
IRON AND STEEL" to be as follows:-
•
Ores of iron have been reduced in open hearth regenerative gas furnaces by
mixing with them reducing and fluxing materials, but in those cases the batch
operated on bas been subjected to direct contact of the flame so as to be more or
less chemically acted on, and the temperature has been carried to, or maintained
at only such a point as to produce the inetal in the form of sponge or puddled ball.
Now, according to this invention, the batch of finely pulverised ore thoroughly
mixed with carbonaceous and fluxing materials is troated in a regenerative gas
furnace constructed and worked as described in a Provisional Specification filed by
the said Frederick Siemens on the 8th December 1883 N° 5677, that is to say the
batch is subjected not to contact with the flame but exclusively to the heat
radiated from it, and this heat is carried to such a point that the metal, as it is
reduced, appears in a state of complete fusion, the slag also being completely fused
and separating itself from the molten metal.
The slag and metal may be tapped off, or the metal may be treated in the usual
way. It may be more or less decarburated if desired by addition of ore or by
Bessemer treatment and it may have added to it ferro-manganese and other
materials such as are employed in the production of steel. In cases where addition
of manganese chromium and the like is desired, a proportion of ores or salts of
these metals may be in the first instance mixed with the batch.
.

page_text: COMPLETE SPECIFICATION,
We, 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 PROCESS FOR THE REDUCTION OF IRON ORES AND PRODUCTION.
OF IRON AND STEEL and in what manner the same is to be performed to be 8
particularly described and ascertained in and by the following statement :—
16
"
Ores of iron have been reduced in open hearth regenerative gas furnaces by
mixing with them reducing and fluxing materials, but in those cases the batch
operated on has been subjected to direct contact of the flame so as to be more or
less chemically acted on, and the temperature has been carried to or maintained at
only such a point as to produce the metal in the form of sponge or puddled ball.
Now, according to this invention the batch of finely pulverised oro thoroughly
mixed with the usual carbonaceous and fluxing materials is treated in a regenerative
gas furnace constructed and worked as described in the Specification of the said
Frederick Siemens' Patent N° 5677 of 1883; that is to say the batch is subjected 1
not to contact with the flame but exclusively to the heat radiated from it, and this
heat is carried to such a point that the metal, as it is reduced, appears in a state of
complete fusion the slag also being completely fused and separating itself from the
inolten metal.
As the mixture of ore with the carbonaceous and fluxing materials is pulverulent,
we make it up before its introduction into the bath if necessary, with addition of
agglutinating material, into lumps, blocks or bricks, or we charge it in its
pulverulent form in iron vessels, which on being introduced into the furnace, melt
down with the rest of the material.
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
The herein described process for reduction of iron ore and production of iron
and steel by subjecting a mixture of iron ore with carbonaceous and fluxing
materials to the radiant heat of a furnace flame carried to such intensity that the
metal and slag are melted to a fluid condition and separate by gravity.
Dated this 25th day of February 1885.
ABEL & IMRAY,
Agents for the Applicants,
28, Southampton Buildings, &
London, W.C.