Improvements in the Method of and in Apparatus for Washing Coal.
Year: 1899

page_text: Date of Application, 14th July, 1899-Accepted, 9th Sept., 1899
COMPLETE SPECIFICATION.
Improvements in the Method of and in Apparatus for Washing Coal.
I, MATTHEW FOSTER HARRISON, of 6, Onslow Terrace, Featherstone, in the
County of York, Mechanical Engineer, do hereby declare the nature of this in-
vention, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:
-
My invention relates to the type of coal washer in which the impurities (being
of greater specific gravity than the coal) are removed by reason of their sinking
to the bottom of the trough or vessel in which the washing takes place.
vention, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:.
-
My invention relates to the type of coal washer in which the impurities (being
of greater specific gravity than the coal) are removed by reason of their sinking
to the bottom of the trough or vessel in which the washing takes place.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a front elevation of my improved coal washing apparatus.
Fig. 2 is a plan of same, with feed conveyor, feed hopper, and feed water pipe
removed.
Fig. 3 is a cross section of washing trough.
In constructing my apparatus I employ a trough A, of any convenient length
and inclined at a suitable angle, which can be varied and adjusted according
to the amount of dirt to be washed out of the coal. Within the trough A is
fixed a screw B, which fits closely to the sides and bottom of the trough and
revolves therein in an upward direction.
A stream of water, regulated by the valve C, is passed into the upper end of the
trough A, and meets with the separated slack or small coal as it is discharged
from the feed hopper D, to which it is passed by means of the conveyor E.
The coal or slack is carried by the action of the water over the screw B towards
the lower end of the trough A, where it is kept by the said screw in a state of
constant agitation, so causing the dirt and impurities to sink to the bottom of
the trough.
The coal or slack is eventually washed away at F by the overflow water, and
passes over the waste water drainer G to the delivery shoot H, where it may be
loaded into the wagons. The impurities in the bottom of the trough A are
carried by the revolving screw B to the upper end of the trough, where they are
discharged by means of the shoot K into the dirt conveyor L, the water being
first drained off at M.
My improved apparatus is suitable for washing slack or various sizes of small
coal, but to ensure efficient working the coal is separated into suitable grades
or sizes before commencing the washing operation.
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:-
1. In coal washing apparatus for removing and separately discharging all
impurities, the employment of a screw revolving within an inclined washing
trough or vessel, substantially as shown and described.
2. The coal washing apparatus consisting of the trough A, revolving screw B,

page_text: feed conveyor E, hopper D, feed water valve C, coal delivery shoot H with
waste water drainer G, refuse shoot K with drainer M, and refuse conveyor L, all
arranged and operated substantially as, and for the purposes, shown and described.
T1 1941 of T..1.. 1900
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent for the Applicant.