U. S. Bureau of Mines Advice on Coal Storage
The Bureau of Mines has conducted a series of tests with bituminous coal that has led to the formulation of the following hints on storage of coals of that nature:
- Piles not to be over 12 feet deep and no part of the interior to be over 10 feet from the surface.
- Store only screened lump coal—if possible.
- Keep out dust as much as possible, and to do this avoid handling.
- Have lump and fine evenly distributed. Do not let lumps roll to the bottom and form air passages.
- Rehandle the screenings after two months, if possible.
- Store away from any sources of even moderate heat and well away from the main buildings of the plant; never against a frame building.
- Allow six weeks’ seasoning after mining before putting into storage piles.
- Avoid alternate wetting and drying.
- Avoid admission of air to the interior of the pile through interstices around timbers, irregular brickwork or a porous bottom, such as coarse cinders.
- If wet coal is received, dump in small piles around the edges, where air can get to it freely to carry away moisture, and where other coal will not be packed on top of it.