Improvements in the Manufacture of Steel and Ingot Iron.
Year: 1890

page_text: Date of Application, 14th Oct., 1890
Complete Specification Left, 14th July, 1891-Accepted, 15th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Steel and Ingot Iron.
I, RICHARD SMITH CASSON of Round Oak Iron Works, Brierley Hill in the
County of Stafford, Manager, do hereby declare the nature of this invention to be
as follows:-
My invention relates to the manufacture of steel and ingot iron, the object being
to provide improved means for carbonizing the molten metal so that the amount of
carbon in the resulting metal may be more or less accurately determined.
To this end I introduce the carbon (preferably in the form of charcoal) into the
casting ladle, the bottom of which may be covered by same, and then tap the metal
direct from the converter or furnace into said ladle, afterwards adding any desired
quantity of ferro manganese or other material.
In this way a high percentage of carbon can be readily introduced into the metal
and a high grade of steel produced.
Dated this 14th day of October 1890.
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London, Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Steel and Ingot Iron.
I, RICHARD SMITH CASSON of Round Oak Iron Works, Brierley Hill in the
County of Stafford, Manager, 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:-
My invention relates to the manufacture of steel and ingot iron, the object being
to provide improved means for carburizing the molten metal so that the amount of
carbon in the resulting metal may be more or less accurately determined.
To this end I introduce the carbon (preferably in the form of charcoal) into the
casting ladle, the bottom of which may be covered by same, and then tap the metal
direct from the converter or furnace into said ladle, afterwards adding any desired
quantity of ferro manganese or other material. In this way a high percentage of
carbon can be readily introduced into the metal and a high grade of steel
produced.
In practice for producing a high grade steel capable of standing from say 26 to
34 tons tensile strain I propose to use about five pounds weight of finely ground
charcoal per ton of metal and also to increase somewhat the usual percentage of
ferromanganese. The charcoal is preferably introduced into the ladle in a loose
form, but if desired it may be put into cotton or other bags.
It will be evident that other forms of carbon than wood charcoal may be
employed so long as it does not contain such a high percentage of sulphur or other
ingredient which would be injurious to the resultant steel.
I am aware that it has previously been proposed to recarburize the molten
metal by introducing wood charcoal and other forms of carbon in various ways, and
I do not broadly claim the recarburizing of steel or ingot iron by the introduction
of wood charcoal, but

page_text: 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 :-
The improvements in the manufacture of steel or ingot iron which consists in
placing the requisite amount of carbon in the ladle and then running the molten
metal thereon, substantially as described.
Dated this 14th day of July 1891.
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London, Applicant's Agent.