steamup wrote: Also, I have been told that if not enough ash content exists in the coal, it may not burn good. Be careful of what you ask for.
It's super dense and and hard to burn especially with the stokers if there isn't a lot of wiggle room for adjustments. I ran into this problem one year and was getting all kinds of complaints it wouldn't burn. Ash content was in 5% range and the coal looked like chunks of glass. They were even having trouble at the breaker with the crusher if they put too big a piece in, it was doing the shake and rattle dance. After I explained the problem that it was "too good" most were able to adjust enough to get it to work right. The hand fired people on the other hand were very happy, lot of good comments the next year. Only trouble there is when you bring them outstanding product like that they expect it again.