An Improved Fire Resisting Compound, Especially Suitable for Forming the Stoppers and Nozzles Used in Steel Melting Operations and other similar Purposes.
Year: 1887

page_text: Date of Application, 12th Sept., 1887
Complete Left, 3rd Oct., 1887
Complete Accepted, 4th Nov., 1887
An Improved Fire Resisting Compound, Especially Suitable for
Forming the Stoppers and Nozzles Used in Steel Melting
Operations and other similar Purposes.
HERBERT LE MEVE FOSTER Bergholt House Yarrow on Tyne in the County of
Durham, Metallurgist, do hereby declare the nature of this invention to be
as follows:-
My invention relates to an improved admixture or compound, especially suitable
for forming the stoppers and nozzles used in steel melting operations, and other
similar purposes.
As is well understood in the steel industry, stoppers and nozzles, or nozzle pots,
are the plugs or valves used for letting the molten steel out of the ladle; hitherto
these have generally been made of fire clay or gannister which is liable to crack,
and does not resist the intense heat engendered by the molten metal for any length
of time.
I have found that a mixture consisting of about 15 to 25% of plumbago and
fire clay or gannistre, or the same amount of plumbago, fire clay and gannister when
moulded and burnt into a brick forms a material well suited for making stoppers
and nozzles or nozzle pots, as it has no disposition to crack, and does not disintegrate
or break up under the heat.
FRANCIS M. ROGER,
Applicant's Agent.

page_text: An Improved Fire Resisting Compound, Especially Suitable for
Forming the Stoppers and Nozzles Used in Steel Melting
Operations and other similar Purposes.
HERBERT LE MEVE FOSTER Bergholt House Yarrow on Tyne in the County of
Durham, Metallurgist, 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 an improved admixture or compound, especially suitable
for forming the stoppers and nozzles used in steel melting operations, and other
similar purposes.
As is well understood in the steel industry, stoppers and, nozzles, or nozzle pots, are
the plugs or valves used for letting the molten steel out of the ladle into the ingot or
other mould. The annexed drawings will however clearly convey the general shape
and appearance of two of the forms in common use.
In the drawing
:-
Fig. 1, Is an elevation in perspective of the exterior of a nozzle.
Fig. 2, A vertical section.
Fig. 3, A plan of Fig. 5.
Fig. 4, An elevation in perspective of another form of nozzle.
Fig. 5, A vertical section of same.
Hitherto stoppers and nozzles or nozzle pots, have generally been made of fire clay
or gannister, which is forced into a mould and afterwards burnt to a brick. Whenever
formed of fire clay or gannister, they are liable to crack, and do not resist the intense
heat engendered by the molten metal for any length of time. I have found that a
mixture consisting of about 15 to 25% of plumbago and fire clay or gannister, or
the same amount of plumbago, fireclay and gannister, when moulded and burnt into
a brick forms a material well suited for making stoppers and nozzles or nozzle pots,
as it has no disposition to crack, and does not disintegrate or break up under heat.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I would like it understood
that although I have by the annexed drawing shewn two distinct shapes of such
nozzles, I do not thereby bind myself to any such shape or shapes, as these may be
varied to almost any extent to suit circumstances.
What I believe to be novel and therefore claim is.
In the manufacture of stoppers and nozzles or nozzle pots used in the ladles
employed in steel melting purposes, the admixture of from 15 to 25% of plumbago,
with fireclay or gannister, or 15 to 25% of plumbago fireclay and gannister, which
is afterwards moulded into a suitable shape, and burnt into a brick in the usual
manner for the purpose described.
FRANCIS M. ROGER,
Applicant's Agent.