Year: 1887

page_text: Date of Application, 23rd Mar., 1887
Complete Left, 23rd Dec., 1887
Complete Accepted, 3rd Feb., 1888
I GEORGE JAMES SNELUS, of West Cumberland Iron and steel works, Workington,
in the County of Cumberland, Engineer, do hereby declare the nature of this invention
to be as follows:-
My invention relates to a novel method of treating furnace slag to facilitate the
utilization thereof.
Heretofore furnace slag has either been thrown away as useless or else only partially
utilized for want of an economical method of dealing with it.
My invention is chiefly applicable to the slags from Siemen's Martin Steel melting
Furnaces but may be applied to any similar plant and products. At the present time
the slag from Siemens Martin Steel furnaces is allowed to run into a pit in the ground
close to the furnace and the mass, which oftens weighs over a ton, is then lifted and
tipped upon a spoil bank, perfectly useless, or only capable of utilization by a costly
process of breaking. In other cases the slag is run into a single block in a large iron
casing, which is then removed to the tip end.
Now my improvement consists in running the slag in a thin layer, say
1 to 3 inches thick upon a cast iron plate or into a mould so that when cool it can
easily be broken up into small pieces suitable either for use in a blast furnace to
recover the iron and manganese, or for road metal for which purpose it is admirably
suited, as after being run into a thin layer, it can be cheaply broken up and loaded
and is then ready for use.
If it is not convenient to place the casting plate close to the furnace I run the slag
into an ordinary steel casting ladle, lined in the usual manner and mounted upon a
travelling carriage, and then take it to any convenient spot and pour the slag upon
he casting plate as before. The plate can be of any size, so as to make the layer of
lag any desired thickness. The plate has a rim around it and should be placed upon
mall brick pillars so that the air can get under it to cool the whole. Sufficient plates
hould be provided to enable the whole of the slag to be dealt with without putting
Price 6d 1
'

page_text: one layer on top of another. A plate (which may be made in sections) 17 feet × 6 feet
is sufficient to take the slag from a 16 ton furnace and will give a layer of slag 2 to 3
inches thick which breaks up on cooling, and is very easily reduced to pieces of a
most convenient size for road metal or for reduction in a blast furnace.
A further advantage of this method of dealing with the slag is that all the steel
mixed up with the slag of which there is often quite a large quantity is easily separated
from the slag and thereby recovered.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed 1 wish it understood that I
claim
The improved method of treating furnace-slag, consisting in formning the same into
thin sheets or plates and then breaking up the said sheets or plates, substantially as,
and for the purposes, above set forth.
Dated this 23rd day of December 1887.
GEORGE JAMES SNELUS.
Haseltine, Lake & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.