Improvements in the Manufacture of Iron.
Year: 1891

page_text: Date of Application, 5th Nov., 1891
Complete Specification Left, 2nd Aug., 1892-Accepted, 10th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Iron.
HERBERT LE NEVE FOSTER, Round Oak Iron and Steel Works Ltd.,
Brierley Hill, Staffordshire, Steel Works Manager, do hereby declare the nature
of this invention to be as follows:-
My invention consists in producing refined iron in a furnace having a basic or
neutral lining, I prefer to employ a regenerative furnace lined with shrunk dolomite,
or chrome iron ore, as by this means I can by melting a common silicious and
phosphoric pig, with or without a mixture of oxide of iron, obtain a refined metal
free or nearly so from phosphorus and silicon and suitable for puddling.
Dated November 5th 1891.
FRANCIS M. ROGERS,
Agent.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Iron.
I, HERBERT LE NEVE FOSTER, Steel Works Manager, Round Oak Iron &
Steel Works, Ltd., Brierley Hill, Staffordshire, 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 consists in producing refined iron in a furnace having a basic or
neutral lining. I prefer to use a regenerative furnace lined with shrunk dolomite,
basic slag, or chrome iron ore. As by this means, I can by melting a phosphoric
and silicious pig (commonly called cinder iron) with or without a mixture of oxide
of iron, obtain a refined metal, free or partially free from phosphorus and silicon,
and suitable for puddling.
To enable my invention to be better understood, I will now describe the same
more particularly
For the production of refined iron, I prefer to employ a furnace constructed
upon the regenerative principle, the conversion, however, may be effected in any
suitable form of furnace in which sufficient heat can be obtained to melt the iron;
the furnace, however, must be lined with a basic or neutral material.
Dolomite is burnt in a kiln or cupola at a high temperature, and produces what
is termed "shrunk or "calcined dolomite."
I find on melting a common iron containing a high percentage of both silicon and
phosphorus, say 2% to 3% silicon and 2% to 2% phosphorus, in a furnace
lined with the material I have described, with or without the addition of oxide of
iron, I can eliminate a large proportion of both silicon and phosphorus, and
obtain a refined iron of a composition of % silicon and 1% phosphorus, or less
when required.
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 :-
1. In the manufacture of refined iron suitable for puddling, the use in a
regenerative or other suitable furnace of a basic or neutral lining for the purpose
of depriving of phosphorus and silicon, pig iron melted therein, substantially as
described.
2. For the purpose of depriving common pig iron of phosphorus and silicon,
07

page_text: thereby fitting it for puddling purposes, the use and employment of shrunk
dolomite as
a lining for the regenerative or other furnace employed for this
purpose.
FRANCIS M. ROGERS,
Agent.