Once burnt coal

Once burnt coal

PostBy: robb On: Mon Jan 03, 2011 8:39 pm

OK after reading and talking to some old timers (in there 70s and 80s) they said I could take the hardened gray/tan kernel left from the first burn sift out the ash and mix it with new coal to reburn it...#1: is that true?? #2: will it screw up heat capacity (gut says yes as the btus must be less with less to burn)
robb
 
Stove/Furnace Make: Hitzer
Stove/Furnace Model: 608 stoker

Re: Once burnt coal

PostBy: LsFarm On: Mon Jan 03, 2011 9:30 pm

A lot of that 'stuff' you describe in the ash is slate. You can put it through the fire again, but it won't add any heat to the fire..

I've taken a handfull of black pieces from the ash, and put them in the center of the grate, and watched them as they worked their way down to the ashpan again. They glowed red from the heat of the other coal burning, but turned dark faster than the 'fresh' burning coal.. And when inspected the second time in the ashpan, the stuff looked the same as before the second trip through the fire..

So yes you can sift it out, and run it through the fire again, but you won't get any more heat out of it.. at least from my experiences it won't .

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: Once burnt coal

PostBy: tsb On: Mon Jan 03, 2011 9:35 pm

I've done some experiments with the ash from my two stokers.
I rub the ash between my hands (gloves) and then tumble and blow out the dust.
The coal left over burns fine, but the process is a dusty mess. I hope
to work on a more sophisticated process to separate the coal from the ash.
It might be a fools' mission, but it'll be fun to try.
I tried a wet process, but that is more of a mess than the dry method.
tsb
 
Stoker Coal Boiler: Binford 2000
Hot Air Coal Stoker Stove: LL Pioneer top vent
Hand Fed Coal Stove: Saey Hanover II

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Re: Once burnt coal

PostBy: I'm On Fire On: Tue Jan 04, 2011 1:11 pm

I too have thought about running some of the larger chunks of ash through the stove a second time. But considering I'm kind of a lazy person I don't want to be bothered with doing that.

I do however want to start sifting my coal to get the fines out of it. I burn Kimmels and it has a lot fines in it.
I'm On Fire
 
Hand Fed Coal Stove: DS Machines DS-1600 Hot Air Circulator

Re: Once burnt coal

PostBy: Bratkinson On: Tue Jan 04, 2011 5:45 pm

Is it really worth fooling around with the ashes to save, perhaps, 10$? And that's assuming your labor and any equipment you may use and/or buy is completely free.

In looking through the ashes of my stoker, I'd guess that less than 5% appears dark grey to black. Just last week, I took a larger piece (rice coal) and gently hit it with a hammer on the concrete floor of my basement. It didn't break apart like coal does. There were no shiny sides to the small pieces left. It may be slate, it may be dirt mixed into the piece of coal and what's left is the thoroughtly charred/toasted dirt. In my estimation, it's probably unburnable, or, as mentioned above, glows nice when heated but doesn't add heat.

for what it's worth, I don't have a coal-dust problem, but I do get a small amount of ash coating everything in my basement a light grey. Perhaps twice per season I take a damp cloth and wipe down the easy-to-do parts like my stove, the ducts, etc. I do everything I can to minimize the ash that doesn't make it to the garbage baggie in my garbage can. Why would I want to do anything that would most likely increase the flying ash and not yield much of a perceptable benefit?
Bratkinson
 
Hot Air Coal Stoker Stove: Alaska Channing III
Other Heating: Gas FA
Stove/Furnace Make: Alaska
Stove/Furnace Model: Channing III

Re: Once burnt coal

PostBy: mozz On: Tue Jan 04, 2011 5:58 pm

Locals call it bone. I have heard it doesn't burn but yet you need some mixed in with the coal to get the best heat output. This is rice i am speaking of, i can't say i see anything unburnt right now in my AA130 pea ash.
mozz
 
Stoker Coal Boiler: Axeman Anderson 1982 AA-130 Steam

Re: Once burnt coal

PostBy: MoBe On: Wed Jan 05, 2011 5:28 pm

My wifes grandfather is of about 70 years old and has an old Sears Hercules Coal boiler in his wood shop... I know he re-burns his ashes and when he is ready to take the ashes out there is nothing left but DUST and I mean DUST... Keep in mind this is in a hand fired Bit boiler. I think its a generation thing, myself the only time I re-burn ashes is when I have a high Vol coal I will sprinkle some on top of green coal so it doesn't run off on me or when the power goes out it buys some time and insulates the fire... This insulation will keep a good fire underneath for a long wile and keep the boiler cool until the power comes back on (the only downfall to radiant heat) it doesn't gravity...
MoBe
 
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Re: Once burnt coal

PostBy: mcrchap On: Fri Feb 04, 2011 2:02 pm

I used to have a handfired hot air coal furnace. It was normal to have coal slip through the grates when I shook the grates or to have hot coals fall down....especially if my wife tended the fire. I'd pick about 1/2 bucket of unburnt coal for every 5 buckets of ashes. I'd burn it again....why throw it away? Of course I could not tell if I picked the same "coal" each time!
mcrchap
 
Hot Air Coal Stoker Furnace: Keystoker A 90
Coal Size/Type: rice
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Stove/Furnace Make: keystoker
Stove/Furnace Model: Econo

Re: Once burnt coal

PostBy: steamup On: Fri Feb 04, 2011 2:40 pm

I tried this by running the ashes from my k-6 through a 1/4" mesh hardware cloth screen and found that there are two problems.
The first is that there are a large amount of clinklers that are greater than 1/4". These are hard glassy pieces that will not burn.
The other stuff that looks somewhat like coal may actually be slate a previously mentioned. It won't burn again.

When I dumped a sifted batch back into my hopper, I mixed some new coal into it. The next day I had an outfire and had to scoop out truly unburned coal from the ashes.

Lesson learned- Not worth the mess, effort or risk of an outfire.
steamup
 
Stoker Coal Boiler: Axeman-Anderson AA-130, Keystoker K-6
Hand Fed Coal Boiler: HS Tarm 502 Wood/Coal/Oil
Coal Size/Type: pea, buck, rice

Re: Once burnt coal

PostBy: heartofcoal On: Fri Feb 04, 2011 8:33 pm

I'm On Fire wrote:I too have thought about running some of the larger chunks of ash through the stove a second time. But considering I'm kind of a lazy person I don't want to be bothered with doing that.

I do however want to start sifting my coal to get the fines out of it. I burn Kimmels and it has a lot fines in it.


I set up a whole system for screening when I was burning Reading.
For every ten bags I sifted, I ended up with 40-50 lbs. of fines and other junk.
Switched to Blaschak for $10.00 more a ton. What a difference!!!
If you figure in your time and what you throw away from each ton, It's not worth it.
I hear Kimmels is about the same as Reading as far as quality goes. I'd switch brands if it's available.

Ray
heartofcoal
 
Stove/Furnace Make: Russo
Stove/Furnace Model: C-80

Re: Once burnt coal

PostBy: robb On: Fri Feb 04, 2011 9:06 pm

I guess probably not worth the time....but I am cheap and look for something to do when bored drinking a beer.....especially in the winter when hunting season is over.
robb
 
Stove/Furnace Make: Hitzer
Stove/Furnace Model: 608 stoker

Re: Once burnt coal

PostBy: heartofcoal On: Fri Feb 04, 2011 10:45 pm

A couple days ago my brother gave me two bags of deer jerky
It's the best batch he ever made!
Now that's great with beer. Until the next day of course. :funny:
heartofcoal
 
Stove/Furnace Make: Russo
Stove/Furnace Model: C-80

Re: Once burnt coal

PostBy: robb On: Sat Feb 05, 2011 7:57 pm

I have a friend who makes it in bulk and sells it privately to people who buy veggies from him and what not...it is on the downlow because the backwards state Sovietsylvania dictates it cant be sold for public consumption...WHAT A JOKE! Any ways his is awesome with a good Pilsner too.
robb
 
Stove/Furnace Make: Hitzer
Stove/Furnace Model: 608 stoker

Re: Once burnt coal

PostBy: heartofcoal On: Sat Feb 05, 2011 8:02 pm

Has to have that USDA stamp on it brother.
Uncle sam wants his cut!
Here in Mass, we had a hard time getting house insurance because we have chickens!
heartofcoal
 
Stove/Furnace Make: Russo
Stove/Furnace Model: C-80

Re: Once burnt coal

PostBy: robb On: Sat Feb 05, 2011 8:52 pm

that is BS>>>>Big Brother watching me makes me wish I was born and lived 200 yrs ago....be like Jim Bridger or Redford in Jeremiah Johnson!! I am so sick of govt controlling everything....There is a huge difference between govt regs and govt control....we are in an era of total govt control! Being from mass have you ever had Vermont Long Trail? If so is it any good? Distributor down here is selling it cheap.
robb
 
Stove/Furnace Make: Hitzer
Stove/Furnace Model: 608 stoker

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