ron138 wrote:I don't know about Knighthawk, but all the IL coal I've burned so far was so full of iron, you could see the rust in it and pyrite. It would clinker up really bad. My stove doesn't handle them very well. Something to keep in mind.
That was my experience with the Indiana coal we burned when I was a kid - full of pyrite and actually had yellow sulfur on it.
Conversely, this coal I'm burning now from Knight Hawk is beautiful. Not quite as shiny as anthracite pea or nut, but pure black, clean and not messy to handle, i.e. it doesn't turn everything that touches it black. However, this coal is the exception, not the norm. These low sulfur, low ash coals were formed in limited areas where the peat deposits were not overlain with marine sediments - i.e. a river through the swamp covered the peat with fresh water silts first before seawater covered the area. Most of these low sulfur deposits have long been mined-out.
My coal does tend to coke and "agglutinate" quite a bit, but seems to lessen as the coal weathers - it's worst in freshly mined coal. But it doesn't clinker very readily, so would likely work well in a hand fed stove (and your coal would work better in a stoker)