What temperature does anthracite burn at?

What temperature does anthracite burn at?

PostBy: funstuff On: Sun Dec 02, 2007 12:55 am

Does any one know at what temperature anthracite coal burns? In a refractory setting with plenty of primary air and secondary super heated air?
funstuff
 
Stove/Furnace Make: Home made boiler

Re: What temperature does anthracite burn at?

PostBy: funstuff On: Sun Dec 02, 2007 1:57 pm

Nobody knows?
funstuff
 
Stove/Furnace Make: Home made boiler

Re: What temperature does anthracite burn at?

PostBy: Yanche On: Sun Dec 02, 2007 2:49 pm

Assuming complete combustion of the anthracite coal, 4770 deg. F to 4910 deg. F.
Yanche
 
Stoker Coal Boiler: Alternate Heating Systems S-130
Coal Size/Type: Anthracite Pea


Re: What temperature does anthracite burn at?

PostBy: funstuff On: Sun Dec 02, 2007 3:03 pm

Wow! thats hot. Do these coal stoves reach that temp. inside?
I am thinking of useing this coal in my home made boiler. I will have to be carfeul not to melt my heat exchanger. LOL. Hopefully the thermal mass will absorb the flue gases and knock temps down to 2000 degrees. I' ll see. Thanks
funstuff
 
Stove/Furnace Make: Home made boiler

Re: What temperature does anthracite burn at?

PostBy: jpen1 On: Sun Dec 02, 2007 3:56 pm

That is the temperature in the coal bed of perfect fire which will never happen in a coal fired appliance. I think the actual temp at the base of the flames will be around 2000 * F in a stoker but since the fire is small it's kind of like a concentrated flame on a torch so to speak. My stoves body will reach 500 -600 degress on about a 2/3 burn.
jpen1
 
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: 110 Boiler

Re: What temperature does anthracite burn at?

PostBy: funstuff On: Sun Dec 02, 2007 4:00 pm

So I suppose I could burn the stuff in my outdoor wood boiler. Just need to watch how much air it gets. Now how do these stoves remove the ash from around the coal pile. Theold stuff I guess you shook some sort of grate. What do these auto feed stoves do?
funstuff
 
Stove/Furnace Make: Home made boiler

Re: What temperature does anthracite burn at?

PostBy: Matthaus On: Sun Dec 02, 2007 4:37 pm

Before you burn any coal in your furnace you should read up on how a hand fed stove works... you have to have grates and a way to shake them to get the ash to fall into an ash pan below. You also need a way to regulate air coming in under the caol bed. IMO your idea to burn blocks of coal will probably have some insurmountable challenges. :o But then again where there is a wil and plenty of time there is a way. :)

A stoker uses a catch pan under the stoker mechanism or a pit to remove the ash. Burning coal is way different than anything else and needs a proper design to work. My suggestion would be to read up on as many designs as you can before attempting to design your set up for burning coal. :)

Have fun, your boiler looks like a well thought out efficient design for burning wood. :idea:
Matthaus
 
Stoker Coal Boiler: Leisure Line WL110 Dual Fuel, natural gas
Hot Air Coal Stoker Stove: Leisure Line Lil' Heater (rental house)
Coal Size/Type: Rice and Buckwheat Anthracite

Re: What temperature does anthracite burn at?

PostBy: funstuff On: Sun Dec 02, 2007 6:33 pm

I already have an 8inch high space for getting ash. I think some sort of fan to blast the ash off the coal every now and again might do the trick. We will see. I have looked at quite a few designs.
funstuff
 
Stove/Furnace Make: Home made boiler

Re: What temperature does anthracite burn at?

PostBy: Cap On: Mon Dec 10, 2007 8:34 pm

See images.

The long probe sits directly above the coal fire. Temps will vary between 700F & 1000F. The fire I show below corresponds to the image I included in real time. Note: The 2nd image is without a flash. The 3rd is with a flash.
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Cap
 
Hand Fed Coal Boiler: Harman SF 250, domestic hot water loop, heat accumulator

Re: What temperature does anthracite burn at?

PostBy: LsFarm On: Mon Dec 10, 2007 11:05 pm

I've used a probe thermometer and put it directly into the fire, the highest temp I saw was 2200*. Most of the time I could find 1600-1800* spots with ease.

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: What temperature does anthracite burn at?

PostBy: coaledsweat On: Tue Dec 11, 2007 12:01 am

LsFarm wrote:I've used a probe thermometer and put it directly into the fire, the highest temp I saw was 2200*. Most of the time I could find 1600-1800* spots with ease.

Greg L

.


2200* is plenty hot. Steel melts at about 2500F and iron around 2750F, its obvious now what a good overdraft could do.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: What temperature does anthracite burn at?

PostBy: Kent On: Fri Dec 21, 2007 11:35 pm

From the internet research I did tonight, anthracite burns at 900- 950 degrees. No wonder I had trouble getting it started from firewood, -Kent
Kent
 
Stove/Furnace Make: "Home Heater"
Stove/Furnace Model: hand fired coal/wood circa1980

Re: What temperature does anthracite burn at?

PostBy: coaledsweat On: Sat Dec 22, 2007 12:06 am

Yeah, with an ignition point about 3 times that of wood, I would say its not easy to light. :) It has been waiting around so long to get used (300 million years, now thats seasoned!), it takes it a little while to get going.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: What temperature does anthracite burn at?

PostBy: Black_And_Blue On: Sat Dec 05, 2009 9:08 am

Was just thinking the other day about some winter hobbies. You could suspend a crucible in there and melt some low point metals like aluminum, zinc and lead for some home made sand molds or projects.

Only caveat would be the effects of waste gases on the inside of the firebox over time.

Just thinking out loud......
Black_And_Blue
 
Hot Air Coal Stoker Stove: Alaska 140

Re: What temperature does anthracite burn at?

PostBy: coaledsweat On: Sat Dec 05, 2009 10:38 am

You can melt steel too. I did it for years with my hand fired's firebrick retaining bars. The gases won't hurt the firebox to my knowledge.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea