hotblast1357 wrote:the primary control is the same thing, but it depends how open you open yours, i never opened mine more than 2.5 turns out, it always ran between .75 and 1.5 turns out the majority of the time, how open do you open yours? it sounds like your just giving it to much secondary air, how long have you let it run like that? maybe just try it for a day and see what happens, crack your secondary pipes open, and open your primary on the door a little more. and watch it for a day, it shouldnt go out.
Once the fire is established I run the primary control about 1 turn out. It burned about 30 hours like that over the weekend before it needed tending. It held a nice steady temp around 240 degrees over the load door before slowly falling at about the 26 hour mark.
As for the secondary air control I tried to open and close it on an established fire and it didnt seem to have much impact on the ant fire at all. No real change in the in temp over the load door or in the flue pipe.
A couple of observations about the difference in the characteristics of burning bit and anthracite;
*The shake down of the anthracite ash is much more labor intensive than it is with bit (at least in this type of stove). The anthracite ash packs pretty tightly in all the corners and along the edge of the grates. I had to spend a fair amount of time with a long poker scraping down the sides and cleaning out the corners.
Different from bit in regard to the shakedown process. When I shake with bit it all just falls out without a lot of effort.
*There is a little more fuss trying to get the fresh anthracite coal to ignite. You have to be conscious to not smother the fire.
With bit, you just throw it on and look out... lol
*Ironically the anthracite is much dustier and has a lot of fines in it. This kind of surprised me a little. Not unmanageable...just a something I didn't expect.
I use lump bit coal so there are no fines and no dust. Just fill a bucket with some baseball and softball sized pieces and carry it in. If it's cold out throw a football sized piece or two on top.
*Anthracite is MUCH more stable.
*There is NO smoke.
*There is NO smell.
*The extended burn times at low temps a very nice too.
I can see where some people may not have the patience to burn anthracite in a stove of this type. In my opinion the "V" shaped firebox and the shaker grates are NOT ideally designed to burn anthracite coal to say the least.
Lightning's modification to tie the front and rear rocker grates together so it takes the slop out of that connection is a MUST to burn anthracite in this type of stove. If you don't, I'm not sure you could ever effectively clear enough ash from the rear of the firebox for it to burn efficiently.
As for bit coal (or least the lump coal from eastern KY), the Hot Blast stove/furnace is a bit coal burning machine. There are a couple of modifications that you can make that are nice but it will burn bit right out of the box...and burns it very well. FOR THE MONEY, I'm not sure you can find anything that burns bit and wood much better.
All and all I'm very happy with what I've learned about anthracite coal and how it works in my stove.
The positive characteristics of it way out weigh any negatives so far. I'm sure as time goes on I'll develop some routines that will help smooth out my anthracite tending issues.
I'll be curious to see the difference in the burning characteristics between the two fuels when it gets really cold out.