Them weird clumps in the stove ?

[ChuckRock]

Y'all ever get " rocks" in your ash like porous "rocks" I'm guessing sap ash and minerals from the wood + heat ? It's just a wonder me and a few friends have .
*Hint elm and maple seem to make more .

 

[Natster]

Yes, it's common. No idea what it is. But that yes, I get them too. Elm tends to make more.
N

 

[Saiso]

Nope. Although I know what you mean. I mostly burn red maple and white birch. With the odd sugar maple.

 

[stumpy75]

Yup. I see them mostly with the slippery(red) elm I have.

 

[Flint Mitch]

I get that on occasion. I burn mostly ash, with a little red and sugar maple

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[buzz sawyer]

I get em with Elm.

 

[babybart]

I get them no matter the wood I burn, red/white oak, white pine, poplar, hickory. They are only front center where the air enters the firebox.

 

[moresnow]

clinkers

 

[Del_]

40 years of burning wood and have never had 'clinkers'.

 

[John Lyngdal]

I burn oak and find the fairly often.

 

[MechanicMatt]

Get them often, left over carbon is my guess. Some chemist in our group will likely chime in and tell us what it is

 

[Del_]

My Jotul F600 CB must be burning that carbon. Ash in the Jotul drops through a grate in the base in the stove into an ash pan that has a separate door. The gaps in the grate are about 1/4 inch or so. Not a clinker in 20 years.

 

[moresnow]

My Jotul F600 CB must be burning that carbon. Ash in the Jotul drops through a grate in the base in the stove into an ash pan that has a separate door. The gaps in the grate are about 1/4 inch or so. Not a clinker in 20 years.

That's interesting. Very common here. Mostly with Elm. I never get it with softwoods. Actually barely even get any ash when I burn pine.

 

[tla100]

Funny, just started thread on it. Junk cottonwood is the culprit

 

[Del_]

Maybe the clinkers are silica.

Trees do pull silica from the soil into their tissue.

Snow protects tree roots as they 'pump' silica - Futurity

Carbon gets lots of love from ecologists. Removing snow from a section of forest, however, shows that silica warrants attention, too.

www.futurity.org

 

[panolo]

Maybe the clinkers are silica.

Trees do pull silica from the soil into their tissue.

Snow protects tree roots as they 'pump' silica - Futurity

Carbon gets lots of love from ecologists. Removing snow from a section of forest, however, shows that silica warrants attention, too.

www.futurity.org

Yes. More than likely this is it.

 

[Sandhill Crane]

Never seen one.

 

[Ol' Brian]

Yes, used to get those from time to time when we had the wood burning furnace in our basement. I always thought it was from the wife throwing something in there that she didn't want me to see LOL

 

[Bobby Kirbos]

Not a chemist, so this is a hypothesys -
Perhaps it is the minerals in the wood being fused together by the heat, like firing ceramics. Obviously the environment is not as controlled, nor are the minerals packed together, so the result is very porous with weak bonds.

Maybe???

 

[HappyHomeowner]

Yes I get those all the time I think they are as others suggested loosely fused mineral materials probably mostly silica and stuff from soils. I get them from every type of wood I get here, but, every type of wood I get here grows in soil with sand and limestone, granite, sandstone in it in relatively high ratios.