Small Unburnt Coal Pieces in Ash Pan??

A Coal stoker furnace or stove controls most operations including automatically feeding the coal. They are quite similar to any conventional oil and gas units and easily operated for extended periods of time. They commonly use rice coal but may use larger sizes like buckwheat. They can be used as primary heat, supplementary heat or have a dual set up with your existing oil/gas furnace.
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HDRIDERNH
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Joined: Tue. Dec. 11, 2007 11:45 am
Stove/Furnace Make: Keystoker
Stove/Furnace Model: KA-6 Coal / Oil

Post Thu. Dec. 13, 2007 6:40 pm

Hello,
Any ideas on Small unburnt coal pieces that are mixed in with the ash? Possibly an adjustment needed on my Keystoker KA-6 Boiler?

jimbo970
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Post Thu. Dec. 13, 2007 6:59 pm

they are most likely rocks or shale

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Richard S.
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Stoker Coal Boiler: Van Wert VA1200
Coal Size/Type: Buckwheat/Anthracite
Location: NEPA

Post Fri. Dec. 14, 2007 12:39 am

Lightly hit it with a hammer, is it shiny inside?

Post a picture, it's easier to know exactly what you're talking about.
"The difference between stupidity and genius is that genius has its limits."

- Albert Einstein


HDRIDERNH
New Member
Posts: 5
Joined: Tue. Dec. 11, 2007 11:45 am
Stove/Furnace Make: Keystoker
Stove/Furnace Model: KA-6 Coal / Oil

Post Fri. Dec. 14, 2007 1:05 am

I snapped a piece and it is in fact shiny inside. Not sure what that tells you? Coal? I'll get a picture of it and post it here. I Turned the boiler temp down to about 160 from 180 to see how that works? I read in another post about it today.
Thanks much for you time.

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Richard S.
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Posts: 12714
Joined: Fri. Oct. 01, 2004 8:35 pm
Stoker Coal Boiler: Van Wert VA1200
Coal Size/Type: Buckwheat/Anthracite
Location: NEPA

Post Fri. Dec. 14, 2007 2:31 am

Well what you might have is mixture of good coal and not so good coal. I think what happens is the not so good coal burns up quickly and doesn't get hot enough to ignite the real good stuff... i.e its like throwing pine and oak together and the oine burns up quickly and the oak is just getting started. With the coal though possibly by that time it's already going into the ash pan, just a guess really but I've seen it before and generally the unburned pieces are of high quality. Odd but it happens.
"The difference between stupidity and genius is that genius has its limits."

- Albert Einstein

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stoker-man
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Joined: Mon. Nov. 19, 2007 9:33 pm
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Fri. Dec. 14, 2007 5:43 am

I would watch the fire. If the entire firebed is glowing orange and the feed rate is at it's normal pace and black stones are then found in the ash pan, I don't know how it could be coal.
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