Improvements in the Method of Treating Blue Billy or Purple Iron Ore, Iron Sand, and other Ores in a similar Condition, for the purpose of Preparing them for the Reducing Furnace.
Year: 1892

page_text: Date of Application, 18th May, 1892
Complete Specification Left 18th Feb., 1893-Accepted, 18th May, 1893
PROVISIONAL SPECIFICATION.
Improvements in the Method of Treating Blue Billy or Purple Iron
Ore, Iron Sand, and other Ores in a similar Condition, for the
purpose of Preparing them for the Reducing Furnace.
I JOHN BOWING of Tilbury Essex Consulting Chemist do hereby declare the
nature of this invention to be as follows:-
The object of my present invention is to prepare such substances as blue billy or
purple iron ore iron sand and other ores which are in an unfit condition for treat-
ment in blast furnaces in such a manner as to make them suitable for being treated
in reducing furnaces.
**
I have already described how this may be effected in one way in the Specifi-
cation of Letters Patent 11083 of 1891 granted to me for an invention of
Improvements in the method of treating blue billy or purple iron ore iron sand
and similar substances for the purpose of preparing them for the reducing
furnace."
According to my present invention I take for example the "blue billy" and I
mix therewith a suitable proportion of some coking coal and I may in some cases
use water also for the purpose of more effectually mixing these bodies. The
mixture so formed may then be coked in the usual coking ovens and it will be found
to have coked into hard dense masses which can be easily handled and is suitable
for use in an ordinary blast furnace.
I may in some cases add to the mixture a certain suitable proportion of non-
coking coal. But in all cases the best proportions by weight of the different
materials can only be ascertained by experiment and will depend to some extent on
the sort of furnace in which it is proposed to reduce the ores.
Dated this 18th day of May 1892.
JOHN BOWING.
COMPLETE SPECIFICATION.
Improvements in the Method of Treating Blue Billy or Purple Iron
Ore, Iron Sand, and other Ores in a similar Condition, for the
purpose of Preparing them for the Reducing Furnace.
I JOHN BOWING of Tilbury in the County of Essex, Consulting Chemist 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:
The object of my present invention is to prepare such substances as blue billy or
purple iron ore, iron sand, and other ores which are in an unfit condition for treat-
ment in blast furnaces in such a manner as to make them suitable for being treated
in reducing furnaces.
I have already described how this may be effected in one way in the Specification
of Letters Patent 11083 of 1891 granted to me for an invention of "Improvements
in the method of treating blue billy or purple irou ore, iron sand and similar
substances, for the purpose of preparing them for the reducing furnace."
According to my present invention I take for example the "blue billy" and
I mix therewith a suitable proportion of some coking coal and I may in some cases
use water also for the purpose of more effectually mixing these bodies. The
mixture so formed may then be coked in the usual coking ovens, and it will be
found to have coked into hard dense masses which can be easily handled and is
Price dl

page_text: suitable for use in an ordinary blast furnace. I may in some cases add to the
mixture a certain suitable proportion of non-coking coal. I have obtained good
results by the use of 50 per cent. of a highly bituminous coal with 50 per cent. of
blue billy. But in all cases the exact proportions by weight of the different
materials can only be ascertained by experiment and will depend on the quality of
the coal and to some extent on the sort of furnace in which it is proposed to reduce
the ores.
In some cases I find it desirable to use the coking coal in the form of a com-
paratively fine powder, and the powdered coal may be used dry, or water may be
added to it and it may be mixed with the blue billy, and drained, in which case the
powdered coal plays the part of a substitute for tar in the above mentioned process
described in No. 11083 of 1891.
Having now described and ascertained the nature of my invention, and in
what manner the same is to be performed I declare that what I claim is :-
66
(1.) Preparing blue billy" and other disintegrated or friable ores for the
reducing furnace substantially as described.
(2.) The use of a powdered coking coal as a substitute for tar or pitch in the
preparation of ores for the reducing furnace according to the processes referred to
above.
Dated the 18th day of February 1892
JOHN BOWING.