Lignite coal which is lowest grade of coal may only have 14 million BTU's per ton, the highest quality anthracite can exceed 28 million. You can expect about 24 to 25 million BTU's per ton on average from anthracite coal. The BTU content of wood is …

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A Menzies Cone is used to separate crushed anthracite coal from rock. Inside the cone is slurry mixture of water and magnetite. The magnetite slurry has a high specific gravity. This allows the lighter coal to float, the rock and coal with a lot of rock in it sinks.

1 天前 · Stoker Coal Furnaces & Stoves Using Anthracite (Hot Air) A Coal stoker furnace or stove controls most operations including automatically feeding the coal. They are quite similar to any conventional oil and gas units and easily operated for extended periods of time. They commonly use rice coal but may use larger sizes like buckwheat.

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Stoker Coal Boiler: Gentleman Janitor GJ-5, Van Wert VA-600, Axeman Anderson130 X3. Hand Fed Coal Furnace: Harman SF3500 reduced down to 3 grates connected to its own plenum Coal Size/Type: Rice, Chestnut and whatever will fit through the door on the Harman Other Heating: Noth'in but COAL! Well, Maybe a little tiny bit of wood

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Anthracite coal used for home heating purposes is uniformly sized to the following dimensions. The different sizes are used in different applications. The larger sizes consisting of stove, chestnut and pea are typically used in hand fired applications.

Smaller sized anthracite coal like rice will have more volume than larger sizes like chestnut. This may sound counter-intuitive but smaller sizes have much more surface area than larger sizes. The air gaps between the coal may be smaller but the total volume of the those air gaps is a lot more because they occur so much more.