Have you ever seen coal burn? If yes, why?

BarqsHasBite@lemmy.world to Ask Lemmy@lemmy.world – 67 points –

In person I mean.

*Sigh. Not charcoal. Real coal.

71

Yes. Am Welsh. Coal fires are still pretty common in the South Wales valleys. My Grandfather still gets free coal deliveries every other month due to his time working in the pits.

As in part off his pension is free coal for life?

Could ever have a lump sum or coal for life, he picked the coal as the cash payout was around £5000, which would cover the coal cost for about 3 years at the time. He's been having that for over 30 years at this point, pretty good deal!

What if he picked the lump sum and received a giant lump of coal worth £5000

I've done some blacksmithing as a hobby. The two most common ways of heating the metal are a gas or a coal forge. The coal forge normally has some sort of forced air coming from the bottom to feed the fire. The coal starts burning real smoky like, but then turns to coke and burns hotter the more air you force through it. Typically you pile some coal around the sides of the fire so it converts to coke then you scoop it into the fire as needed. Also it produces a waste product called clinker that builds up at the bottom of the fire at the tuyere (the nozzle or grate the air is forced through). It's kind of like stone or metal and it needs to be cleaned out to keep the fire going.

Fun fact for those who don't know. You can forge metal with a wood fire if you have forced air.

There are also ways to build a clay oven so that it has a natural updraft, giving it that forced air. It's actually how people used to fire pottery.

Other than that, you can also use charcoal, which burns hotter with forced air.

Also, a hairdryer puts out enough air to forge with *unless you're running a ribbon burner set-up. But if you are, you likely know that already.

-A fellow hobbyist blacksmith

*Edit to add a word.

Most smithing was done for centuries with charcoal.

In a steam locomotive, but a scale model one that was ridden on instead of in. It was actually pretty cool; they still hand-stoked the firebox and everything, just... really small.

Yep, I dabble in blacksmithing.

You get it going -smokey as shit at first-and it melts together into a lighter, more solid piece that burns hotter and cleaner. That's called coke.

Then you toss your irons in

Yep. Grew up in a house with a wood stove as the only source of heat, and my parents would occasionally use some coal in it. Dad also had a coal forge for hobby blacksmithing.

Where the fires were was around the North and North East of Scotland. Coal man used to come round in a truck, filthy black from the coal, load up the bunkers. I remember it being very messy, sooty, but it was less smokey than the peat fires, though coal didn't smell as nice. There is something really nice about a real fire, though they're not clean. I doubt many of any of those houses have now, gas came along and there was a lot of change.

I'd never really considered that people might not have seen coal burn.

In Ireland both coal and turf are still fairly common as the primary method of heating. That said they are "trying" to phase it out.

Since we produce a lot of NG around here that's what we use for heating. But we always used electric clothes dryers...

Isn’t the burning of bog utterly wrecking parts of your ecosystem? I’m really surprised youse are still doing it in this day an age.

Coal stoves are still sometimes the principal source of heat for rural houses in Eastern Europe. They are slowly being phased out though.

There are apparently a few people here and there who still use it. I remember reading some article about a guy in the US who preferred it.

googles

https://www.npr.org/2019/03/03/699325560/for-the-few-who-heat-homes-with-coal-its-still-king

Every few weeks, John Ord does something unusual for most people living in 2019 — he stops by a local hardware store in rural northeastern Pennsylvania to buy coal to heat his home.

Ord's coal-burning stove burns 24 hours a day when it's cold. He likes the constant heat it gives off and says it's cheaper than his other options — oil and electric.

Yeah, I grew up in a poor area in rural Ohio and we heated primary with coal until 2021.

We used to have a coal fire when I was growing up, so routinely in the winters.

No, but this topic sent me down a rabbit hole briefly.

You may have heard of the Marshall Fire in Boulder, Colorado that burned 1000 homes and killed two people within the city in 2021.

In the area of the point of ignition of this wildfire, an underground coal fire has been known to be burning for the past 150 years. As far as I know they still haven't ruled it out as a possible cause.

The fact that the city decided to build over that is nuts.

It was the opposite of a flood plain, but the land was just as cheap!

Yes, in 1989.

East Perth to Midland train yards on the footplate of the Flying Scotsman.

The fireman was shovelling coal into the firebox, and it was one of the most concentrated sources of heat I have seen in my life.

Rode in an old steam train that has a boiler fueled by coal. Got to see the furnace* that heated the boiler have some fresh coal shoveled in before we went for a short ride.

*I don't remember if it is called a furnace on a train, it was a few decades ago and I'm too lazy to look it up.

If my son’s 9000 train-related books are to be trusted, I think it’s called a “firebox”.

Used to have a coal fire when I was growing up in the 90s, rural Wales, was able to heat our water too.

Nothing beats a baked potato cooked under a coal fire.

Yes. In the Aga at home and the coal fire in the living room. Also in the grate at a friend's house.

Why? Aga for cooking and hot water, coal stove for heat, likewise coal in a grate.

ETA: coal as in Anthracite, Stove Esse, Stove Nuts. Not charcoal or coke. The latter two I have cooked on and forged metal with respectively.

A lot of homes where I grew up still had coal fires, so yes, a lot, but its been a long while since I have seen a coal fire. Charcoal as the other commenter said i still see regularly on bbq's .

Don’t go to a lot of BBQs, I take it?

Charcoal isn't coal. There are several types of natural coal and charcoal, and they all have slight differences in density and chemical composition; so they probably all look a bit different when burning. Just like how different brands and types of charcoal can also look slightly different when burning (such as one kind throwing off sparks while it ignites and another that doesn't).

I've never seen natural coal burning. But I've seen at least 3 types (not just brands but actual differences in how they are made) of charcoal burn, and they all give quite a different "show" as they do.

I'm talking real coal.

Ehrm yes, that's also 'real' coal. There are multiple types of coal.

https://zgrills.com.au/coal-vs-charcoal

Coal is a natural mineral that forms over the span of millions of years while charcoal is a manufactured product created from wood. While coal in its natural state is never used alone in a barbeque or smoker, it is commonly added to charcoal briquettes to increase the energy density.

Here in New Zealand you can buy it at the Hardware store in 20KG bags. Older houses have pot belly "stoves" for heat, which are smaller then log burners usually, and coal is the best fuel for them.

I don’t think I’ve ever seen coal burn, but you can find pieces of it along the abandoned railways and beaches in my area. We have a coal dock that’s been abandoned for 50 years and the ground is still black with coal dust

Edit: actually a scenic railroad in my area still has a coal fired steam locomotive so yes, I can say I’ve seen coal burn!

A friend of mine bought a literal ton of coal for $75 to heat his pole barn in a wood burner that could also be used to burn coal. His chimney wasn't tall enough and wind would drag the smoke down to ground level as it passed over the gambrel roof. It was nasty. I believe later on I learned that coal from my region is of poor quality and gets sent overseas

I have open fires in my house, it was built in the 1840s so yes.

This is very common in the uk, though in many places smokeless replacements for coal are legally required.

I did an hour of a metalworking class at scout camp in the 80s.

Yes. I picked a bunch of coal pieces up at Stockton beach once as a kid and took them home because coal was interesting - I tested burning at least one of those pieces in the wood fire that winter.

Yes, growing up. Even saw it get made, though I don't remember much. Perks of being part of the peasantry I suppose...

We had to make it ourselves because it was too expensive to buy. Used a little bit for everything, cooking, heating, making booze.
Then things changed, laws passed, gas became cheaper and coal-making was forgotten because it was too much work for too little gain.

Yes, I have seen and lit it several times.

I was often in charge of lighting the grill when I lived at home with my parents, we used a hot air gun to light the grill, and it worked really well, we never used lighter fluid, just hot air, and during the process you easily see flames comming up from the burning coal.

Failing that, I used to be an active member of a herritage railroad with steam trains, looking into the firebox of a steam enging you clearly see the coals burning.

Why would you not do that?

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I lived in wv, you find chunks of it out in the ground sometimes. I was a curious kid and tried to get some to light. It was real low quality though so it burnt like shit

Yes. I got to look around a steam train when they were doing trips for Father's Day. I even got to keep a piece as a momento.

Yes, my grandparents had a potbelly stove that they used for heat. A coal tripple was about a quarter of a mile from our house and we could walk down the railroad tracks and collect a bucket full.

While growing up my family's home had heating stoves capable of burning both wood and coal. While we primarily burned wood, coal would sometimes be used, particularly on nights when it was really cold out as it tended to burn hotter and usually burned longer than wood of the same volume.

What's the difference?

One you can mine from the ground.

The other you get by smelting oak logs in a furnace

You can also get the former by killing wither skeletons, making it a renewable resource.

Coal is mined out of the ground.

Charcoal is wood that has been super heated to remove the water.

Charcoal is wood that has been heated above combustion temperature without oxygen. That does drive off water, but it also chemically decomposes the lignin and other organics into primarily carbon while creating a volatile mixture of gasses known as woodgas.

Source: Have a woodgas generator. Byproduct is charcoal.

Yes, I have coal furnace + boiler as a central heating installation.

Charcoal for cooking on a grill is most frequent and normal. (Yes, I know charcoal briquettes are not pure coal, but some do contain coal as an additive).

Because of schooling and work, I've seen it burned in power plants and burned it myself in a laboratory setting (comparing bituminous to anthracite to others). My sister volunteers at a historical blacksmith shop, they have a couple different demonstration furnaces and one burns coal. There's also a steam engine demonstrator that runs on coal, but they don't fire that one up very often.

When I was a little kid, so young my memories are very hazy, i was taken to see the sod house my great grandma grew up in before it was torn down. They used coal for heating.

Do bituminous and anthracite burn differently? Visually or otherwise?

If you're in the field maybe your can also say how you pronounce bituminous. I've always heard bitch-you-min-us, but I recently heard beh-tu-min-us.

I've heard bi-tuminous. Hard "I", like in bi-cycle. And bit-uminous, soft "I" like in "he bit into the apple".

I have never heard the "t" turned into a "tch" sound.

And you don't even have to burn them to see a difference. You can see and feel it.

It might be more bich-you-min-us.

So what's the difference in coals? I'm actually interested if and how they visually burn differently.

Yes. Used to build and install coal boilers for hot water heating systems.

Yep. When I was young, we had a stove in my house for heat that burnt coal or wood. We mostly burnt coal in it.

Yes. Grew up in a house without central heating. Learned to build up and maintain fire in an oven as a kid.