Manufacture of Hard Coke.
Year: 1888

page_text: Manufacture of Hard Coke.
[, JOHN JAMESON of Akenside Hill, in the City and County of Newcastle-upon-Tyne
Consulting Engineer, 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 of improvements in apparatus for obtaining bye-products in the
manufacture of hard coke consist in part in modification of the arrangements patented
by me in 1884 No. 14551, in so far as these arrangements relate to the irons and in
the oven floors. Instead of the horizontal T irons therein specified I use vertical irons.
These irons I may make of round section for square recesses left in the brickwork of
the false floor of the oven or I may make them of square iron for round recesses, or
in any other convenient form and I prefer that the iron should taper from the top
downwards and that at the top it should be furnished with a thin mushroom head so as
to keep small particles of coal or coke dust from falling in to the gas passages. The
heads of the irons I round off and 1 place them about a quarter of an inch below
the level of the floor so as to avoid risk of catching the rake in the drawing of the
oven.
A section of the oven floor in the drawing hereto attached illustrates all these
points wherein the line A. B. is the oven floor, and the shaded portions underneath is
brickwork and the unshaded parts are gas passages and the black burs are the irons
referred to. Another part of my invention consists in a method of making the true
Hoor of the oven air tight. It is extremely difficult to form a structure of brickwork
with any kind of cement which will bear the heat imparted to the floor of a coke
oven and the application of quenching water while in a highly heated state and at the
same time remain permanently so unaffected in structure as to be nearly air tight and
in order to obviate this difficulty 1 by my invention introduce cooling arrangements
between the true floor and the false floor of the oven whereby I can prevent the
variation of temperature which I find to be so injurious. These arrangements may
consist of circulating pipes in which water or air are circulated or the arrangements

page_text: may consist of a cistern of water in which the water is exposed to the direct action of
the oven gas and is in part evaporated so as to take away the heat due to the
convection of the brickwork. The latter method is that shewn in the drawing. The
water is supplied to the lower part of the cistern and may be maintained at any
convenient height below the level of the gas suction pipe by connection to an outside
cistern or otherwise. I am thus enabled to use an iron cistern which so long as it is
supplied with water can never become overheated.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what I
claim is :
1st. The use of vertical irons in the false floor of a coke oven adapted to the
recovery of bye products, substantially as described.
2nd. The application of arrangements whereby the true floor of such coke oven is
exempted from considerable changes of temperatures and maintained practically air-
tight, substantially as described.
Dated this Fourteenth day of September 1888.
JAMESON & SCHAEFFER,
Agents for Applicant.