Ash by volume, not by weight

Ash by volume, not by weight

I understand that by weight I should see roughly 8% to 14% of my coal feed returning in the form of ash, but looking at this differently, on a volume for volume basis how does the ash typically measure up?

For example: If I'm burning 10 gallons per day of coal, how many gallons per day of ash should I expect to get in return?

My first guess is 1/3, or roughly 3-1/3 gallons of ash out for every 10 gallons of coal in.
lsayre

Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Blaschak Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW)

Re: Ash by volume, not by weight

There are a huge number of variables in the answer to your question.
If in a flat bed stoker, where the coal gently rides down a slightly sloped grate, with very little mechanical 'crushing' occuring, I think that a gallon of coal may net 1/2 to 3/4 gallon of ash.

In the other extreem, in a stoker that has a lot of weight on the coal, and a lot of mechanical crushing action, like an AA or AHS boiler, then the gallon of coal may net less than a quart of ash. I think with my AA260, burning UAE [very low ash coal] Pea coal, I get probably a few cups of ash per gallon of coal burnt. I'm burning roughly two to three five gallon pails of coal per 24 hour period, and I'm getting less than 2 gallons of ash per day. I empty my ash pan every two or three days, and it rarely is more than 1/4-1/3 full. The AA firepot and sliding/slicing grate-drawer grinds the ash to a powder with a few mixed in clinkers that escape the grinding action.

In many hand fed stoves with a deep firebox, meaning a lot of weight on the ash against the shaker grates, the coal is ground to a fine powder..

So there are many variables.. but by weight will almost always be accurate, the fine powder is fairly heavy, so your % of ash by weight is pretty accurate.
I can certainly see the difference between 6-7% ash coal and 12-12% ash coal.. I have to empty the ashpans twice as often !!

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: Ash by volume, not by weight

I have a Keystoker 90 with the "Flat Plate Design" the ashes are high volume but low weight. The old hand fired Buderus gave dense powdery ash. I dump the ashes on the dirt ramp up to "Coal Barn". They are like walking on popcorn. Always crunching down and becoming more dense, then when dumped.
2001Sierra

Hot Air Coal Stoker Stove: Keystoker 90 Chimney vent
Coal Size/Type: Rice
Other Heating: Buderus Oil Boiler 3115-34
Stove/Furnace Model: Keystoker 90 Chimney Vent

Re: Ash by volume, not by weight

Never measured it but I would suggest 1/3 is a good guess , keep im mind it can be crushed down considerably.
Richard S.

Stoker Coal Boiler: Van Wert VA1200
Coal Size/Type: Buckwheat/Anthracite

Re: Ash by volume, not by weight

I don't want to sound like a jerk but is there a practical application to this question or are you guys so bored that you sit and think up this stuff. My Keystoker produces about a tub ful or a little more for every 240 lb load.
TAMNOZ

Stove/Furnace Make: KEYSTOKER soon
Stove/Furnace Model: Koker

Re: Ash by volume, not by weight

TAMNOZ wrote:I don't want to sound like a jerk but is there a practical application to this question or are you guys so bored that you sit and think up this stuff. My Keystoker produces about a tub full or a little more for every 240 lb load.

Not to sound like a nerd, but how many gallons is that tub?
lsayre

Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Blaschak Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW)

Re: Ash by volume, not by weight

I don't know or care. Whatever came with the stove is how big the tub is. If I had to guess I would say 10-15 gal. Again I ask is there a reason for such a question, does this tell you how well your stove is burning or what? Not to criticize anyone on this forum,I think it's one of the best forums that I follow. It's peolple ask questions and then I sit here pondering the answer and say to myself why should I or do I need to know that. I have learned more here than on any other forum. Thanks guys.
Jim
TAMNOZ

Stove/Furnace Make: KEYSTOKER soon
Stove/Furnace Model: Koker

Re: Ash by volume, not by weight

Based on my pouring in a 5 gallon paint pail of rice coal and looking at the volume of ash in the pan, I'd say about 1/3 to 1/4 the volume of coal ends up as ash. But, without weighing it, I'd say I'm getting about 10-15% ash by weight.

As mentioned above, crushing it will take up far less space. As an experiment, I used my workboot (with foot in it) to step down the ash after pulling it from my Alaska Channing III. Very gently, of course, to avoid a making a cloud in my basement. With one pressdown action, I think I compressed it by 30-40%. Of course, my black workboot was now all grey and I still got something of a cloud.

Although I would like to have less volume of ash, it's really moot for me. I leave it in contractors' bags (3mil) at the curb for the trash man each week. However...we are limited to a 50 pounds of trash per week/one 33 gallon trash can, although unlimited recycling paper & containers. Optionally, I can use \$2.00/bag "extra trash" bags purchased from the town to dump more trash. Not in my lifetime! One time, I put a couple of 35-40# bags of ash into my trash barrel and he left one behind with a sticker on it reminding me of the 50# limit. Unfortunately, he has to pick them up and toss them in the hopper rather than having an automated side loader truck, so I can't sneak in a fast one. So, in the coldest part of the winter, I have to start keeping about a bag a week of ash for later curbside disposal. This year, it was in August before I got rid of the last of my ash bags from last season.

Too bad I don't have a friend in the DPW that could throw the ash in with the sand/salt used on the roads...
Bratkinson

Hot Air Coal Stoker Stove: Alaska Channing III
Other Heating: Gas FA
Stove/Furnace Model: Channing III

Re: Ash by volume, not by weight

Its like jeopardy. My guess Hes he's trying to figure one of the following:

1. How often to empty the ash or how long he can go without doing it.
2. How many ash containers are needed to not have to go outside and dump.
3. Is the coal he obtained ashing more or less and is that a good thing.
4. How to build an auger or a storage mechanism for the ash.
5. What size contractor bags to buy that will hold all the ash.
ValterBorges

Stove/Furnace Make: AHS
Stove/Furnace Model: S260

Re: Ash by volume, not by weight

Pretty good guesses overall.
lsayre

Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Blaschak Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW)

Re: Ash by volume, not by weight

Depending on where you live go talk to your local road crew and see if they will let you throw it on the salt pile. I t runs thru the salt spreader with no problems and has better antiskid qualities.
Jim
TAMNOZ

Stove/Furnace Make: KEYSTOKER soon
Stove/Furnace Model: Koker

Re: Ash by volume, not by weight

There is no better anti-slip than coal ash. It is very abbraisive, and more effective than sand. My Dad's crew uses it in the barn so the cattle don't slip.
Rob R.

Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: Ash by volume, not by weight

Bratkinson wrote:Too bad I don't have a friend in the DPW that could throw the ash in with the sand/salt used on the roads...

Not sure what town you're in. In Dalton, the transfer station collects ash in a container that periodically is emptied by the Highway Department. If you have a sticker, there's no fee.

Mike
Pacowy

Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: Ash by volume, not by weight

On a snowy nite I have no problem sharing my ashes with the highway dept. at the end of the street.
2001Sierra

Hot Air Coal Stoker Stove: Keystoker 90 Chimney vent
Coal Size/Type: Rice
Other Heating: Buderus Oil Boiler 3115-34
Stove/Furnace Model: Keystoker 90 Chimney Vent