Year: 1897

page_text: France),
Date of Application (in United Kingdom), 6th Mar., 1897
Complete Specification Left, 6th Mar., 1897-Accepted, 15th May, 1897
I, JOSE DE MOYA, of 59, Boulevard Barbés, Paris, France, Engineer, 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, that is to say :-
My said invention has for its object an improved process for the manufacture of
steel which increases the yield of useful metal, reduces the expense, and produces
a superior, fine grained and homogeneous quality of metal, whilst employing
half the quantity of ferro-manganese, and silicospiegel used in the ordinary process.
My process is also applicable to the manufacture of steel in the cupola as well as
in a furnace, such as Martin's and in converters such as those of Bessemer, Thomas,
and others.
In principle my invention consists in adding to the bath of steel in a fused state,
at first chloride of sodium and carbonate of lime, and afterwards plumbago.
In order that my invention may be properly understood I will suppose that my
process is put in operation in a basic Bessemer converter working 8 tons of steel.
In this case I add to the mass under treatment 12 kilogrammes of chloride of
sodium and 20 kilogrammes of carbonate of lime. This addition must be made
immediately before removing the slag. The apparatus is rocked to liberate the
fumes whilst the blast is turned on; it is then brought to rest and allowed to stand
for about two minutes, and then the slag is removed. After this operation, the
ferro-manganese is added in a half less quantity than in the ordinary process; next
(the apparatus still being in a state of rest and the blast turned off) 6 kilogrammes
of plumbago are introduced; and the metal is allowed to stand for a minute after
which it can be poured.
The process followed is exactly the same where an acid converter is used, except
that, in this case, there is no necessity to remove the slag.
In the same way in the case of the manufacture of steel in a basic Martin furnace
the same proportions of chloride of sodium and carbonate of lime are used. The
addition of these materials is made immediately before removing the slag and then
about a quarter of an hour before pouring a supplementary addition is made of a
mixture containing 10 kilogrammes of chloride of sodium, 20 kilogrammes carbonate
of lime and 6 kilogrammes of plumbago.
Where, instead of a basic Martin furnace; an acid Martin furnace is employed,
the mixture of chloride of sodium and carbonate of lime is only once added. This
single addition is made about 15 or 20 minutes before pouring and it is followed by
an addition of 6 kilogrammes of plumbago added about four minutes before
ins

page_text: It will be understood that the proportions and the times herein indicated are only
given by way of example and may be varied to suit different cases without in any
way altering the nature of my invention.
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 improved process of manufacturing steel consisting in adding to the bath of
fused metal chloride of sodium, carbonate of lime and plumbago, substantially as
and for the purposes hereinbefore described.
Dated this Fifth day of March 1897.
EDMUND HUNT,
Applicant's Agent.
EDMUND HUNT,
Applicant's Agent.