2001Sierra wrote:Ash content is SO IMPORTANT with a hand fired. You are shaking the ash down, and that can be real work. The lower the ash the easier your life will be. Buderus hand fired for 27 years. High ash coal is like pouring dirt into your stove.
Low ash coal is not always better when the ash content is below 5% the coal will not burn to well it will be harder to light
and will burn up faster with less heat output That is why you will see many coal breaker add higher ash content coal to mix with low ash content coal to up the ash content so the coal will burn longer and will light easier They will add a % of
slate as well as bone some will also add coal dirt / fines to get the ash content up . 6 to 14% ash is where you want coal to be anything lower or higher will not burn well or hold a fire long there are some where around 30 different veins of anthracite coal not all are the same some will be low ash content other's will have high ash content higher % of bone which is rock that is formed in the coal it does have a small amout of carbon in it the trick is to get the right mix of
coal's some veins are just naturally better then other's has the right ash content and high btu value with out doing anything to the coal but clean it & size it burn it other veins will need help adding other's to make it burnable .