Improvements in the Manufacture of Steel.
Year: 1891

page_text: Date of Application, 13th Apr., 1891
Complete Specification Left, 12th Sept., 1891-Accepted, 17th Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Steel.
I, JOHN HENRY DARBY of Pen-y-garth near Wrexham in the County of
Denbigh Iron and Steel Manufacturer do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates more particularly to a method of adding ferro-manganese,
spiegel, ferro-silicon, silico-spiegel, ferro-aluminium, ferro-nickel or other metal or
alloy to molten steel in conjunction with solid carbon.
In my Specifications Nos. 418, 20,586 and 4,030 I have described an
invention for adding carbon to steel or iron and the manner in which it may be
carried out.
In the adding of carbon to the steel in the way described in my aforesaid
Specifications great difficulty has been experienced in adding of the carbon to the
iron in definite quantity without any appreciable amount of this carbon being
oxydized by the oxygen of the air, or that of the slag, or in other words in
plunging of the carbon into the iron so as to bring it into intimate contact with
the latter.
Now as for most steel purposes the silicon, aluminium, nickel, or manganese alloy
of iron has to be employed in any case, and as it has been found that this alloy can
be added to the iron in the solid form I make use of this alloy to plunge the carbon
below the surface of the iron. To effect this I place in the hopper or chute or
other receptacle to contain the ground carbon the ferro-manganese or other metal
or alloy broken in small pieces mixed along with the carbon or above the carbon ;
the carbon and alloy then pass together through the regulating valve in the
hopper &c. and mix and dissolve in the molten steel. By this means the operator
need not be exposed to the scorching heat of the metal by standing over the mouth
of the ladle while there is a large volume of flame issuing from it as he is frequently
obliged to do when adding the carbon to the iron in any other way.
Dated this 11th day of March 1891.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Steel.
1, JOHN HENRY DARBY of Brymbo, near Wrexham, in the County of Denbigh,
Iron and Steel Manufacturer, do hereby declare the nature of this invention 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 more particularly to a method of adding ferro manganese,
spiegel, ferro-silicon, silico-spiegel, ferro-aluminium, ferro-nickel or other metal or
alloy to molten steel in conjunction with solid carbon.
In my Specifications Nos. 418, 20586, and 4030) I have described an
invention for adding carbon to steel or iron and the manner in which it may be
carried out.
In the adding of carbon to the steel in the way described in my aforesaid
Specifications difficulty has been experienced in adding the carbon to the iron
in definite quantity without any appreciable amount of the carbon being oxidised
by the oxygen of the air or that of the slag, or, in other words, in plunging
the carbon into the iron, so as to bring it into intimate contact with the latter.

page_text: Now, as, for most steel processes, the silicon, aluminium, nickel or manganese
alloy of iron has to be employed in any case, and as it has been found that
this alloy can be added to the iron in the solid form, I make use of this alloy
to plunge the carbon below the surface of the iron. To effect this, I place, in
the hopper or chute or other receptacle for containing the ground carbon, the 5
ferro-manganese or other metal or alloy broken in small pieces mixed along
with the carbon or above the carbon; the carbon and alloy then pass together
through the regulating valve in the hopper, etcetera, and inix and dissolve in
the molten steel.
Where the alloy is used in the form of small ingots of given weight, these 1
can be cast hollow and the carbon packed inside them.
By this means the operator need not be exposed to the scorching heat of the
metal by standing over the mouth of the ladle, while there is a large volume
of flame issuing from it, as he is frequently obliged to do when adding the
carbon to the iron in any other way.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
In the manufacture of steel, adding the free carbon to the blown or oxidised
charge along with the spiegeleisen or other alloy whereby the weight of the
alloy assists in immersing the carbon in the molten metal.
Dated this 11th day of September 1891.
2
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.