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One ton of coal is approximately equal to 40 cubic feet. Therefore, three tons of coal would require around 120 cubic feet of storage space.
A cubic foot of crushed coal typically weighs between 50 to 60 pounds, depending on the coal size and density.
fifoenergy.com says 35.314 cubic feet per 1 ton of bituminous coal. My coal supplier tells me to figure about 36 cubic feet for my antrhacite pea coal wikianswers says about 40 cubic feet per ton of antrhacite.
Oxygen is the element in the air that is needed for coal dust to burn. When coal dust is exposed to oxygen and heat, it can ignite and burn.
Coal is removed from the earth through a process called mining. There are two main methods of coal mining: surface mining and underground mining. In surface mining, large machines remove the topsoil and rock layers to access the coal deposits, while in underground mining, tunnels are dug deep into the earth to reach the coal seams.
that would depend on the size of the blast furnace.