Improvements in Utilising Slag or Cinder from Steel-melting Furnaces.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Utilising Slag or Cinder from Steel-melting
Furnaces.
I, JAMES RILEY, General Manager to The Glasgow Iron and Steel Company,
Limited, 36, St. Vincent Place, in the County of Glasgow, North Britain, Iron and
Steel Manufacturers, do hereby declare the nature of this inventon to be as
follows, that is to say :-
My said invention has for its object the advantageous utilisation of the slag or
cinder formed in the production of steel in open-hearth furnaces. This slag has
hitherto been a waste product, not only practically valueless, but causing expense
for its removal, and requiring large ground areas on which to deposit it.
By my
invention I make the slag available for general use in iron smelting or blast
furnaces, and thereby render it of value in replacing more or less of the iron ores
smelted in the furnaces.
In practice the slag runs out of the steel-melting furnace after the largest portion
if not the whole of the steel has been run into the ladle, it being usual to allow
the slag to run into the ladle and overflow into tubs or moulds in which it sets solid
and in which it is removed to the depositing ground. In carrying out my invention,
according to one modification I proceed, at the stage when the slag is passing from
the ladle to the tub or mould, to mix with the stream of slag rich ore in small
pieces such as can be had in abundance; or instead of such ore or along therewith
I may use scale or what is known as "purple ore or "blue billy "adding them in
suitable proportions. Where the slag is that from the acid steel-melting process I
would use ores as little silicious as possible; but where the slag is from the basic
process it is not so desirable to have the silica small in quantity.
"
The actual practical operations in carrying out my invention, may be varied but
the essential features are the enriching of the slag with suitable small ores to
render it advantageously applicable in blast furnaces, and the rendering conveniently
available in blast furnaces, small ores and the like, which have hitherto given much
trouble.
When mixing the ores with the slag lime or other fluxing material may also be
added if found desirable.
My invention is also applicable to the slag after it has solidified, and even after
it has been deposited for a shorter or longer period, it being merely necessary to
melt it in a cupola or other suitable furnace and to add to it the small ores or the
like as herein before described.
Dated this Twentieth day of August 1897.
EDMUND HUNT,
Applicant's Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in Utilising Slag or Cinder from
Furnaces.
Steel-melting
I, JAMES RILEY, General Manager to The Glasgow Iron and Steel Company,
Limited, 36, St. Vincent Place, in the County of Glasgow, North Britain, Iron and
Steel Manufacturers, 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 the advantageous utilisation of the slag or
cinder formed in the production of steel in open-hearth furnaces. This slag has
hitherto been a waste product, not only practically valueless, but causing expense
for its removal, and requiring large ground areas on which to deposit it. By my
invention I make the slag available for general use in fron smelting, or blast or
other metallurgical furnaces, and thereby render it of value in replacing more or
less of the iron ores smelted in the furnaces.
In practice the slag runs out of the steel-melting furnace after the largest portion
if not the whole of the steel has been run into the ladle, it being usual to allow the
slag to run into the ladle and overflow into tubs or moulds in which it sets solid
and is thence removed to the depositing ground.
In carrying out my invention according to one modification I proceed, at the
stage when the slag is passing from the ladle to the tub or mould to mix with the
stream of slag rich ore in small pieces such as can be had in abundance; or instead
of such ore or along therewith I may use iron or steel scale, or what is known as
purple ore or "blue billy" adding them in suitable proportions. Where the
slag is that from the acid steel-melting process I would use ores as little silicious as
possible.
"
33
The actual practical operations in carrying out my invention may be varied but
the essential features are the enriching of the slag with suitable small ores to
render it advantageously applicable in blast furnaces, and the rendering conveniently
available in blast furnaces, small ores and the like which have hitherto given much
trouble.
When mixing the ores with the slag lime or other fluxing material may also be
added if found desirable.
My invention is also applicable to the slag after it has solidified, and even after
it has been deposited for a shorter or longer period, it being merely necessary to
melt it in a cupola or other suitable furnace and to add to it the small ores or the
like as herein before described.
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
1. Making slag or cinder from steel-melting furnaces suitable for utilising in iron
smelting or blast furnaces, by mixing or combining therewith any suitable ore, or
scale or what is known as "purple ore" or "blue billy" or any combination of
such materials and with or without a fluxing material, substantially as herein before
described.
2. Mixing with slag or cinder from steel-melting furnaces either when first made
or after being remelted any suitable ore or iron or steel scale or what is known as

page_text: "purple ore" or "blue billy" or any combination of such materials, and with or
without a fluxing material, substantially as hereinbefore described.
3. The use in blast furnaces or other metallurgical furnaces of slag or cinder
from steel-melting furnaces, after having been treated substantially as hereinbefore
described.
EDMUND HUNT,
Applicant's Agent.