Report of the Bureau of Mines of the Department of Internal Affairs of ...

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xliv INTRODUCTORY TO Off. Doc.
Cut No. 3.—This shows the culm bank at Black Diamond and the
place from which the culm is removed.
Cut Xo. i.—This is an idea which I have had for some time as
to how a plant of this sort should be constructed.
Mr. T. R. Griffiths
has made a drawing which is attached. You will notice it has three
sets of rollers and three small screens, one to screen the dirt from the
first i)air of rollers and the second screen to screen it from the second
pair and the third to screen it from the third. The first pair of rolls
should break the large bone and slate down to egg size, the second
pair should break it to chestnut size, and the third pair should grind
it to No. 2 buckwheat and dust.
This seems to be expensive, but sucii
a plant would save itself in pipes, w ater and labor in six months.
Cut No. 5.—Mr. T. R. Griffiths has also suggested a plan by which
we can feed the scraper line by steam power. You will notice by the
illustration that it is a frame on wheels that can be pushed into the
dump and kept against it; then comes a ])air of circular elevators to
take the dirt up in front over the top and dump the same into a chute
that leads into the main line of scrapers. Some might suggest a large
hose and water to wash it into the trough. This has too many objections.
1. Situated near towns there is no place to properly care for the
water.
2. It would feed the pipe irregularly and thus block it.
3. The stuff thus wet would clog half the buckets of the elevators
by sticking in the bottom and destroying their cai)acity.
4. In winter the w^ater would freeze.
"Dodson Culm Plant—Cost.
Cost of engine, crusher rolls, elevators and conveyors,. .
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Pump for supplying fresh w'ater for culm (lushing,
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Steam and column pipe for pump, v 1,250 00
Culm pipe from plant to shaft head,
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Culm i)i])e inside mines: Dodson breaker and bank culm ^
are fiuslu^d through the same pipe,
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500 feet of 4-incli pipe, y 1,350 00
2,500 feet of 5-inch pipe,
1,500 feet of (vinch pipe,
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Total, 17,473 42
From breaker
From culm bank,
('iilni Flushed Daily |7 hours").
110 Tons.
SO Tons.
Total
100 Tons.