Coal quality - ash by weight or volume ?

Coal quality - ash by weight or volume ?

PostBy: Sunny Boy On: Wed Dec 18, 2013 7:58 pm

I've seen anthracite coal quality listed by the percent of coal to ash, but is it by % of weight of coal burned to ash, or the volume of coal to ash ?

Paul
Sunny Boy
 
Hand Fed Coal Boiler: Anthracite Industrial, domestic hot water heater
Baseburners & Antiques: Glenwood range 208, # 6 base heater, 2 Modern Oak 118.
Coal Size/Type: Nuts !
Other Heating: Oil &electric plenum furnace

Re: Coal quality - ash by weight or volume ?

PostBy: Carbon12 On: Wed Dec 18, 2013 8:12 pm

I do mine by weight. 100 pounds burned produces 10 pounds of ash. 10% ash by weight. Volume I don't keep track of.
Carbon12
 
Stoker Coal Boiler: Keystoker KA-6
Coal Size/Type: Rice/Anthracite
Other Heating: Heat Pump/Forced Hot Air Oil Furnace

Re: Coal quality - ash by weight or volume ?

PostBy: Dennis On: Wed Dec 18, 2013 8:16 pm

I used to measure by weight,but this year i'm measuring by truck loads with this new coal :mad:
Dennis
 
Hand Fed Coal Boiler: AHS/WOC55-multi-fuel/wood,oil,coal
Coal Size/Type: Anthracite/stove size

Visit Hitzer Stoves

Re: Coal quality - ash by weight or volume ?

PostBy: lsayre On: Wed Dec 18, 2013 8:20 pm

By volume it's down right scary sometimes. :shock:
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Stockton Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW)

Re: Coal quality - ash by weight or volume ?

PostBy: Sunny Boy On: Wed Dec 18, 2013 8:20 pm

C12,

I've been doing the same - by weight. Been keeping track and it's running about 12% for the last 19 days.

I remember reading somewhere that 20 % was considered standard grade, and 15-12 % was high and ultra high grade.

Just can't remember where I found all that, and I don't think it said if it was weight of volume. :oops:

Paul
Sunny Boy
 
Hand Fed Coal Boiler: Anthracite Industrial, domestic hot water heater
Baseburners & Antiques: Glenwood range 208, # 6 base heater, 2 Modern Oak 118.
Coal Size/Type: Nuts !
Other Heating: Oil &electric plenum furnace

Re: Coal quality - ash by weight or volume ?

PostBy: Rigar On: Wed Dec 18, 2013 8:21 pm

Dennis wrote:I used to measure by weight,but this year i'm measuring by truck loads with this new coal :mad:


...me too...absolutely amazed at how much (heavy) ash i have this season...
..nothing like last year
Rigar
 
Hot Air Coal Stoker Furnace: Keystoker A 150
Coal Size/Type: anthracite rice
Stove/Furnace Make: Keystoker
Stove/Furnace Model: A 150 warm air furnace

Re: Coal quality - ash by weight or volume ?

PostBy: Sunny Boy On: Wed Dec 18, 2013 8:22 pm

Dennis wrote:I used to measure by weight,but this year i'm measuring by truck loads with this new coal :mad:



You truck out the ash ? That's a lot of coal burnin'. :shock:

Paul
Sunny Boy
 
Hand Fed Coal Boiler: Anthracite Industrial, domestic hot water heater
Baseburners & Antiques: Glenwood range 208, # 6 base heater, 2 Modern Oak 118.
Coal Size/Type: Nuts !
Other Heating: Oil &electric plenum furnace

Re: Coal quality - ash by weight or volume ?

PostBy: Lightning On: Wed Dec 18, 2013 8:25 pm

Yes I believe ash is measured by relative weight compared to coal. So the way I understand it, 100 pounds of coal with 10% ash should produce 10 pounds of ash. But It's difficult to be accurate since some un burned coal tends to end up in the ash. The only way to be close is to measure coal weight total for a couple weeks and compare it ash weight for that time period.
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: Coal quality - ash by weight or volume ?

PostBy: Carbon12 On: Wed Dec 18, 2013 8:27 pm

I was suspect about my 10% ash by weight findings but I've repeated the measurements several times with small and large quantities of coal and it has always come out to 10% ash by weight. Not complaining. By volume, it certainly is fluffy with sheet pans of coal cakes. Very little unburnt coal, however.
Carbon12
 
Stoker Coal Boiler: Keystoker KA-6
Coal Size/Type: Rice/Anthracite
Other Heating: Heat Pump/Forced Hot Air Oil Furnace

Re: Coal quality - ash by weight or volume ?

PostBy: Sunny Boy On: Wed Dec 18, 2013 8:29 pm

Rigar wrote:
Dennis wrote:I used to measure by weight,but this year i'm measuring by truck loads with this new coal :mad:


...me too...absolutely amazed at how much (heavy) ash i have this season...
..nothing like last year


Interesting. I started keeping track because I was running much less than I remember having to empty the 6 gallon ash can I use. It's been taking 3-1/2 to 4 days of ash to fill it. Past years, I couldn't get more than 3 days worth of ashes in that can.

Also, this years load of nut is running slightly larger sizes with a few chunks up in the stove coal size range.
And no wood chunks this year either. Past years there's always been wood chunks. Last year it was so loaded with wood there was at least one chunk in every coal hod full.

Paul
Sunny Boy
 
Hand Fed Coal Boiler: Anthracite Industrial, domestic hot water heater
Baseburners & Antiques: Glenwood range 208, # 6 base heater, 2 Modern Oak 118.
Coal Size/Type: Nuts !
Other Heating: Oil &electric plenum furnace

Re: Coal quality - ash by weight or volume ?

PostBy: Sunny Boy On: Wed Dec 18, 2013 8:36 pm

Carbon12 wrote:I was suspect about my 10% ash by weight findings but I've repeated the measurements several times with small and large quantities of coal and it has always come out to 10% ash by weight. Not complaining. By volume, it certainly is fluffy with sheet pans of coal cakes. Very little unburnt coal, however.


That would seem about right from here too. I got a better scale that has proven itself rather accurate when checked with know weights. I'm getting a couple pounds more than you because my stove doesn't burn it all to ash. I get some unburned coal.

But, if quality is measured by % of weight then 10% is off the scale I remember reading.

Paul
Sunny Boy
 
Hand Fed Coal Boiler: Anthracite Industrial, domestic hot water heater
Baseburners & Antiques: Glenwood range 208, # 6 base heater, 2 Modern Oak 118.
Coal Size/Type: Nuts !
Other Heating: Oil &electric plenum furnace

Re: Coal quality - ash by weight or volume ?

PostBy: Dennis On: Wed Dec 18, 2013 8:45 pm

Sunny Boy wrote:
Dennis wrote:I used to measure by weight,but this year i'm measuring by truck loads with this new coal :mad:



You truck out the ash ? That's a lot of coal burnin'. :shock:

Paul


It was ment as a joke,but iv'e been used to UAE coal and with this Blaschak coal it's more than twice the ash and half the heat,i'm very dissapointed :down:
Dennis
 
Hand Fed Coal Boiler: AHS/WOC55-multi-fuel/wood,oil,coal
Coal Size/Type: Anthracite/stove size

Re: Coal quality - ash by weight or volume ?

PostBy: Sunny Boy On: Wed Dec 18, 2013 8:52 pm

Dennis wrote:
Sunny Boy wrote:
Dennis wrote:I used to measure by weight,but this year i'm measuring by truck loads with this new coal :mad:



You truck out the ash ? That's a lot of coal burnin'. :shock:

Paul


It was ment as a joke,but iv'e been used to UAE coal and with this Blaschak coal it's more than twice the ash and half the heat,i'm very dissapointed :down:


Sorry to hear that Dennis.

Paul
Sunny Boy
 
Hand Fed Coal Boiler: Anthracite Industrial, domestic hot water heater
Baseburners & Antiques: Glenwood range 208, # 6 base heater, 2 Modern Oak 118.
Coal Size/Type: Nuts !
Other Heating: Oil &electric plenum furnace

Re: Coal quality - ash by weight or volume ?

PostBy: Richard S. On: Wed Dec 18, 2013 8:56 pm

It's by weight and keep in mind when you are given figures by breaker that's from a lab. Lab conditions are not going to be duplicated in the real world especially with a stoker.
Richard S.
 
Stoker Coal Boiler: Van Wert VA1200
Coal Size/Type: Buckwheat/Anthracite

Re: Coal quality - ash by weight or volume ?

PostBy: Rob R. On: Thu Dec 19, 2013 6:28 am

Just because a certain coal source has a lower ash by weight figure than another doesn't mean you will have to empty the ash tub less frequently. Some coal produces ash that is fluffy and fills the tubs quickly...but they will be easier to carry. :)

Edit: I suppose this is might be harder to observe in hand-fired equipment since the ashes are usually ground to a powder...but in a stoker it can be very easy to see. Probably the biggest difference I observed when running a hand-fed was how easy the stove shook down when burning coal that produced fluffy white ash.
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

Visit Hitzer Stoves