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The broken coal then goes to the 6 mm, perforation eccentric 
swinging screen (4) on which the screenings under 50 mm. from 
(2) also fall. 
The sizes under 6 mm. fall direct into the bucket elevator pit (A) 
below, while the lumps over 6 mm. are taken to the two bell mills 
(5) and crushed to under 6 mm. when they also fall into the pit (A). 
Washing Plant 
The Elevator (6) lifts the coal from (A) to the distributing 
screws of the twelve Ilumboldt Patent Percussion Screens (7) with 
1 mm. spaces, through which the dust under 1 mm. falls. 
The sizes 1 -—6G mm. are flushed away in launders to the was- 
hers (8). The clean washed coal of No. 1 quality flows through 
launders to the bucket elevator sump (B), is lifted by the predraining 
bucket elevator (9) to the distributing scraper conveyor (10), and is 
divided up among the four storage bunkers (C). = 
Each bunker compartment holds about 50 tons, so that 200 T. 
in all can be stored, sufficient for about two days output. 
In these towers the coal continues to drain, the water that 
trickles through being taken direct to the bucket elevator sump (B). 
Scraper plates (11) are placed under the discharge openings of 
the towers, which enable a definite quantity of coal to be scraped 
off into the screw conveyors (12), leading to the disintegrator (13). 
The middlings and dirt from the washer (8) are discharged in 
their lower portions, taken through pipes to the middlings elevator 
(14), lifted to an elevated launder, and flushed to the fur, 3 screen 
felspar washers (15). Three products are here obtained, viz: Coal, 
quality No. 2, shale, and pyrites. 
The washed coal quality No. 2 flows through launders to the 
bucket elevator sump (D), is lifted to the distributing scraper con- 
veyor (17) by the pre-draining bucket elevator (15), and is distri- 
buted among the three storage bunkers (E). 
The dust under 1 mm. from the percussion screens (7) iscaught 
in the pocket (F) under same, lifted to the scraper conveyor (17) by 
the dust elevator (18) and mixed on the former with the washed 
coal No. 2 quality. 
