coal not burnibg

coal not burnibg

PostBy: sbucky On: Sat Mar 15, 2008 4:25 pm

my efm coal stoker has a lot of unburned coal in the ashes can you tell me what is wrong
sbucky
 
Stove/Furnace Make: efm
Stove/Furnace Model: ?

Re: coal not burnibg

PostBy: LsFarm On: Sat Mar 15, 2008 7:43 pm

Usually unburnt coal in the ashes is a problem with the coal. Substandard coal has a lot of black shale [rock] in it that looks like coal, but won't burn... also a lot of coal breakers are using 'reclaimed' coal for their rice and buckwheat size coal they sell.
This 'reclaimed coal' is the coal stacked up in huge piles around the breakers that has sat there for decades.. The piles are of small size coal.. it was the leftovers from breaking up large coal down to stove, nut and pea size. Untill recently there wasn't that much of a demand for smaller sizes like rice.. So the piles sat in the sun, wind and rain for decades.

When coal sits in the sun, wind and rain, some or all of the 'volitiles' evaporate away, this leaves some of the coal VERY difficult to burn.. Some just won't burn..

So the unburnt in your ashpan may be just bad coal..

OR: is there a dark spot on your burner?? like a pie shaped wedge that is dark, where the coal is not burning??
Are you pulling the lever every day and dumping the fines into the ashpan??
If you have a dark spot, you have a bad grate-section, you need to shut it down, clean it out and replace/reseat/reseal the grate, and clean out the fines.

Take a look at the burn pot, is there a even red/orange ring of hot coals, with an even perimeter of ash?? Or is it irregular, and a part of the hot coals dropping off the edge into the ashpan??

Hope this helps,, give us some more info. maybe we can helps.

greg L
LsFarm
 
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland

Re: coal not burnibg

PostBy: e.alleg On: Sat Mar 15, 2008 10:29 pm

Did it start when you switched or got a new batch of coal, or are you new to using the EFM? It might be a simple air/feed adjustment, not enough air will create lots of unburned coal in the pan. If it was fine previously then like Greg said it's probably the coal. I had the same problem a while back, finally I started saving the unburned pieces and throwing them directly on the fire. They didn't sizzle or burn, they were just stones.
e.alleg
 
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: coal not burnibg

PostBy: LsFarm On: Mon Mar 17, 2008 10:00 am

I remember throwing black pieces of 'coal' back on the fire, once, scorching my gloves really bad,, I thought to myself,, with that much heat, even the %$#@%&((@ rocks should BURN !! :lol: :lol: :lol:

Greg L
LsFarm
 
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland

Re: coal not burnibg

PostBy: stoker-man On: Mon Mar 17, 2008 11:17 am

When somebody asks about this at efm, I just reason with them that if all the surrounding coal is glowing orange, how is it that a few pieces aren't burning.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove