Improvements in Obtaining Cyanides and other Products from Blast Furnaces.
Year: 1897

page_text: This print is in accordance with the Original Specification as it stands after Amend-
ment (under Section 11 of the Patents, &c., Act, 1883) as required by the decision
of the Chief Examiner, of the 9th day of April 1898.
Improvements in Obtaining Cyanides and other Products from Blast
Furnaces.
I, ANDREW KIRKWOOD McCOSH, of Gartsherrie Ironworks, Coatbridge, in the
County of Lanark, North Britain, Ironmaster, do hereby declare the nature of
this Invention to be as follows, that is to say :-
My said Invention has for its object to obtain from the gaseous matters
present at certain parts of blast furnaces cyanides and other utilisable products.
For this purpose I make one or more apertures through the boshes of a blast
furnace at one or more convenient points above the ordinary tuyere level and
between that level and the bottom of the zone of deoxidation of the ore,-say at
from eight to twelve feet above the tuyere level; and through such aperture
or apertures I by means of pipes, with draw part of the furnace gases," which
gases I draw or force through some suitable washing apparatus. The washing
Liquid having become charged with cyanides, ammonia, and other products, is
drawn off and fresh liquid is supplied to the washing apparatus. To separate
the ammonia I distil the liquid, and to obtain the cyanides I settle and decant the
liquid and thereafter evaporate to dryness, preferably in a partial vacuum the
product being crude cyanides. Or I add carbonate or hydrate of iron and form
ferrocyanide.
The pipes for the withdrawal of the gases from two or more furnaces are connected
with a main, and I make connections with this main and the furnace blast pipes,
all connections being provided with valves. With this arrangement gas can be
withdrawn from any furnace or air can be blown into it at the indicated level
above the tuyeres, I also connect steam injectors to the withdrawal pipes, and I
provide the pipes with doors and scrapers for clearing out matters deposited therein
together with travelling boxes or trucks for conveying the deposited matters to
apparatus for dissolving out from them any utilisable constitutents, the solutions
obtained being treated along with the liquid from the gas washing apparatus.
Dated this Fifth day of January 1897.
EDMUND HUNT,
Applicant's Agent.

page_text: COMPLETE SPECIFICATION (AMENDED).
Improvements in Obtaining Cyanides and other Products from Blast
Furnaces.
I, ANDREW KIRKWOOD McCOSII, of Gartsherrie Ironworks, Coatbridge, in the
County of Lanark, North Britain, Ironmaster, 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 to obtain from the gaseous matters
present at certain parts of blast furnaces cyanides and other utilisable products.
For this purpose I employ apparatus parts of which are shown on an accompanying
sheet of explanatory drawings to be hereinafter referred to.
Figure, 1, is a horizontal section, Figure 2, is an elevation; and Figure 3, is
a vertical section at right angles to Figure 2, showing a blast furnace as arranged
for carrying out my improvements.
I make a series of apertures, A, (or it might only be one aperture) through the
boches of the blast furnace at one or more convenient points above the ordinary
tuyere level, B, and between that level and the bottom of the zone of deoxidation
In these
of the ore, say at from eight to twelve feet above the tuyere level, B.
apertures A, I insert pipes, C, connected with a pipe, D, encircling the furnace.
The pipe, D, from the furnace (or from two or more furnaces) is connected with a
main, E, and a pipe, F, having a stop valve connects the encircling pipe, D, with
the furnace blast pipes, G, I may also connect steam injectors to the pipe, D.
With these arrangements part of the furnace gases can be withdrawn through the
pipes C, D, and the main, E, by an exhauster (not shown) placed beyond certain
condensing and washing apparatus to be hereinafter referred to; or air can be
blown into the furnace at the indicated level, A, from the blast pipes, G, through
the pipes, F, D, and, C. When the gas is being withdrawn as described it is
accompanied by sublimed particles of the cyanides and other products which become
deposited in the pipes, D, and main, E, and for the purpose of admitting scrapers
for clearing out such deposited matters I provide pockets, J, made with sliding doors
between the pipes, C, and pipe, D, and also attached to the main, E, and the latter
is provided with doors, H, for introducing scrapers. The deposited matters are
from time to time transferred from the pockets, J, to travelling boxes or trucks, K,
for conveyance to apparatus for dissolving out from them any utilisable constituents
the solutions obtained being treated along with the liquid from the gas washing
apparatus hereinafter referred to.
'
The part of the furnace gases withdrawn through the pipes, C, D, and the main E,
by the exhauster as herein before stated are also drawn through condensing and
washing apparatus of any suitable known kind. The washing liquid having become
charged with cyanides, ammonia, and other products, is drawn off and fresh liquid
is supplied to the washing apparatus. To separate the ammonia I distil the liquid,
and to obtain the cyanides I settle and decant the liquid and thereafter evaporate
it to dryness, preferably in a partial vacuum the product being crude cyanides. Or
I add carbonate or hydrate of iron and form ferrocyanide.
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 combination and arrangement of parts in connection with blast furnaces

page_text: substantially as and for the purposes hereinbefore described and as shown in the
accompanying drawings.
Dated this Fourth day of October 1897.
EDMUND HUNT,
Applicant's Agent.