Blast Furnace Slag Ladles.
Year: 1899

page_text: Date of Application, 12th June, 1899-Accepted, 22nd July, 1899
COMPLETE SPECIFICATION.
Blast Furnace Slag Ladles.
I, JOHN LESTER STEVENSON, of Cleveland Steel Works, South Bank R.S.O., in
the County of York, Engineer, and Jons Evans, of Cleveland House, South Bank,
in the County of York, Engineer Student, 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 to improvements in slag ladles intended to carry molten
or solid slag from the blast furnace to the tipping ground, but more particularly
slag in a molten state, by which operation a large amount of labour is saved,
and about two thirds of the tipping space only is taken up when compared with
the same weight or volume of solid slag tipped.
The object of this invention is to provide a wrought iron or steel ladle or pot
made in one piece, instead of fining the outer wrought ladle with fire bricks,
or cast iron segments, as hitherto.
The necessity of having a ladle, which will clear itself of its contents, without
any further trouble or expense than tilting it over, is clearly apparent, when the
difficulty of emptying ladles not constructed according to this improved form,
especially when the slag has become solid, is taken into consideration.
Another advantage arising from the use of this improved form of ladle and pot,
is, that the inner lining or pot can be changed in a very short time, and at a
very small cost for labour, as compared with ladles now in use not constructed
according to this invention.
This invention consists then. in the peculiar form and construction of the
inner pot used, which is cast in one piece; the same consisting of a circular
conical pot with a dome shaped bottom, the upper or open portion of the pot
having a strong flange running entirely round it, by which it is firmly bolted to
the outer wrought ladle.
The evident use of the outer ladle, is to prevent serious accidents in case of
breakage of the inner cast iron ladle or pot while full of molten slag, and also
to prevent the inner cast iron ladle or pot, coming into direct contact with the
atmosphere, especially during frosty weather. The space between the two ladles,
preferably to be left open, but may be filled with nonconducting composition
without effecting this invention. The whole is mounted on a suitable carriage
which does not form any part of this invention.
In the accompanying drawings, forms of ladles are shown, fully illustrating and
setting forth this invention.
In Figure I is shown a wrought ladle with inner cast iron pot: Figure II is
plan of same showing circular ladle which however may be made oval or oblong
and still embody our invention, which consists of a wrought iron or steel ladle a
made of strong plates, into this ladle is fixed the cast iron pot or ladle b this
latter is made to taper inwards from the circular opening to the bottom which
is dome shaped, so as to allow the slag whether molten or solid to slide out
easily when the ladle is tipped over by the crane used for the purpose of empty-
ing the ladles.

page_text: The carriage may be fitted with tilting gear without in any way effecting the
value of this invention, which provides a ladle for the purpose described which
can be emptied clear of its contents, an advantage not possesed by any ladle at
present used for the same purpose.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
1. ladle for the purpose described, made of cast iron in one piece, and
fitted into a wrought, outer ladle to which it is attached substantially as described.
2. A ladle for the purpose described, made of wrought iron or steel, containing
a solid cast iron ladle fastened to it by a strong flange substantially as described.
Dated this Tenth day of June, in the year of our Lord One thousand eight
hundred and ninety-nine.