Improvements in Tuyeres for Blasts of Furnaces and for Agitating Molten Material.
Year: 1887

page_text: Date of Application, 28th Nov., 1837
Complete Specification Left, 1st Aug., 1888
Complete Specification Accepted, 7th Sept., 1888
PROVISIONAL DIDIFICATION.
Improvements in Tuyeres for Blasts of Furnaces and for Agitating
Molten Material.
We, HENRY BOWES SCOTT of Broadway Chambers, Westminster in the County of
Middlesex Engineer and WILLIAM GENTLES of St. Helens in the County of Lancaster,
Metallurgist do hereby declare the nature of this invention to be as follows:-
This invention relates to tuyeres such as are used for injecting blasts of air or other
fluid into furnaces or into masses of molten material to effect agitation, the object
which we have in view being to give durability to the tuyeres by a certain extent of
cooling, and to utilise the cooling medium, which may be water, steam or air, by
injecting it or a portion of it in a heated condition along with the blast.
A tuyere
according to this invention is in the form of a double pipe, the inner central or blast
pipe open at both ends, and the outer which annularly surrounds the central pipe, as a
casing being closed at the end. In the annular space between the inner pipe and the
outer casing we arrange several tubes extending nearly to the closed end of the casing.
Through these tubes we send currents of water, steam or air which issuing from the
ends of the tubes impinge on the closed end of the casing cooling that end of the
tuyere, the fluid returning along the annular space and more or less cooling the rest
of the casing. In cases where it is desired to admit water spray, or superheated
steam or hot air with the blast, we provide apertures or passages from the annular
casing into the central blast pipe at the outer end of the tuyere, so that when water is
used for cooling, spray of the water can issue from the casing into the central pipe
joining the blast therein, or when steam or air is used for cooling, jets of the steam
superheated or of the air heated in its passage along the casing can be admitted to
join the main blast.
Dated this 28th day of November 1887.
ABEL & IMRAY,
Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Tuyeres for Blasts of Furnaces and for Agitating
Molten Material.
We HENRY BOWES SCOTT of Broadway Chambers Westminster, in the County of
Middlesex Engineer and WILLIAM GENTLES of St. Helens in the County of Lancaster,
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 :-
This invention relates to tuyères such as are used for injecting blasts of air or other
fluid into furnaces, or into masses of molten material to effect agitation, the objects
which we have in view being to give durability to the tuyères by a certain extent of
cooling, and to utilise the cooling medium, which may be water, steam, or air, by
injecting it or a portion of it in a heated condition along with the blast.
Figs. 1 and 2 of the accompanying drawings are longitudinal sections on planes
perpendicular to each other, and Fig. 3 is a transverse section on X X¹ of a tuyere
according to our invention. A is the pipe supplying the blast of air or other fluid
which may be heated; this pipe terminates in a central jet orifice a and has a
removeable plug a¹ for giving access to clear the pipe. B is the central tube of the
tuyere enclosed in a casing C of larger diameter so that there is an annular space D
surrounding the central tube. A pipe E with branches F F communicating with
tubes GG within the space D, is supplied with air, steam or water, which is directed
in jets against the end of the space D, and returns to passages H leading into the
central tube B. By the heat to which the casing C is subjected the air or steam
is superheated or the water is vaporised cooling the casing, and the heated air or
steam issuing from the passages H, joins the central jet from a and mixes with the
blast.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed we declare that what we
claim is:
•
The construction and use of a tuyere substantially as described and shewn by the
drawings.
Dated this 30th day of July 1888