[hamdani yusuf]

You are probably the only person on Earth who thinks that a match near a block of warm charcoal will set it on fire.

So you should do the experiment.
The rest of us already know the answer.

So you think you can read my mind.
It would be easier if it's in the form of powder.
The author of the article shown in google search thinks that flash point of charcoal is 40 degree C. How would you reconcile that with your statement above?

If I have the time and other resources to do the experiment, I'll do it. But currently I'm occupied with something else that I think are more important and urgent.

What makes you think that you can represent the rest of us?

[hamdani yusuf]

What do you mean by saying that charcoals don't have flash point?

[hamdani yusuf]

Did you send the author a request for a video demonstrating the claim's truth?

I haven't. Do I have to?

[Bored chemist]

The author of the article shown in google search thinks that flash point of charcoal is 40 degree C. How would you reconcile that with your statement above?

By pointing out that he is wrong.

Why don't you understand that?
If he was right then putting a match near a piece of charcoal on a warm day would set the stuff on fire.

Do you understand what "flash point" means?

I haven't. Do I have to?

You asked me; why not him?
Why are you still asking me about something which someone else wrote, and which is clearly wrong?

[Bored chemist]

What do you mean by saying that charcoals don't have flash point?

Charcoal doesn't have a defined flash point.

[Petrochemicals]

I am not familiar with charcoals flash temperature

It doesn't have one.

I just googled it.

The flashpoint of charcoal is the temperature at which it will ignite and give off an open flame. The Flashpoint of Charcoal is 40 degrees Celsius. Dec 23, 2021

40c seems a bit low, at that temperature in hot countries you would not be able to smoke on a hot day. Wood and charcoal go through a couple of different stages of cumbustion. First they are heated causing the release of smoke from the wood as the cellulose decomposes, secondly the remainder oxidises. If the flash temperature of the vapour only needed to be 40c fires would not smoke I would not think.

[hamdani yusuf]

By pointing out that he is wrong.

Which means I'm not the only one, contrary to your claim.

https://fireproofdepot.com/is-charcoal-flammable/

What Is The Flashpoint Of Charcoal?
The flashpoint of charcoal is the temperature at which it will ignite and give off an open flame. The Flashpoint of Charcoal is 40 degrees Celsius.

This is the temperature that should be reached to make a piece of charcoal useful for cooking or burning other substances.

[hamdani yusuf]

Charcoal doesn't have a defined flash point.

Does it mean that it can't be ignited even in elevated temperature?

Does sugar have a flash point?

[hamdani yusuf]

You asked me; why not him?
Why are you still asking me about something which someone else wrote, and which is clearly wrong?

This video uses coal dust instead of charcoal dust, but I think it can represent my point.

[Bored chemist]

Which means I'm not the only one, contrary to your claim.

You would need to ask him if it's a mistake or something.
You, on the other hand, seem to genuinely believe it.

Feel free to ask him.

[Bored chemist]

Does it mean that it can't be ignited even in elevated temperature?

No that would be an unbelievably stupid thing to say, since it is used as a fuel.

Does sugar have a flash point?

Do the experiment , and find out.

[Bored chemist]

but I think it can represent my point.

What point?
He certainly didn't do a series of experiments at different temperatures and show that there was a change in behaviour at 40C.

You really don't understand what a flash point is, do you?
Why not just google it?

[hamdani yusuf]

What point?

It doesn't have to be you. It can be anyone. Don't take it personal.
The evidence should show the limiting factors. e. g. failing to set charcoal to burn below 40C but success when it's over 40C. Some other influential parameters should be stated, such as particle size of the charcoal, air pressure, oxygen concentration, humidity, spark size/energy.

[hamdani yusuf]

He certainly didn't do a series of experiments at different temperatures and show that there was a change in behaviour at 40C.

Is there any other way to support a statement that flash point of charcoal is 40C?

[hamdani yusuf]

You really don't understand what a flash point is, do you?
Why not just google it?

First entry of google search :
The flash point is the lowest temperature at which a volatile substance evaporates to form an ignitable mixture with air in the presence of an igneous source and continues burning after the trigger source is removed.

What's important about knowing the flash point of a substance is to know if a process or storage involving it is safe from fire hazard. Getting the incorrect information may lead to loss of lives or assets, or loss of business opportunity.

[hamdani yusuf]

Does it mean that it can't be ignited even in elevated temperature?

No that would be an unbelievably stupid thing to say, since it is used as a fuel.

Does sugar have a flash point?

Do the experiment , and find out.

Some datasheets state that flash point of sugar is N/A (not available or not applicable) or left blank. But we can learn from someone else's mistake.

https://en.m.wikipedia.org/wiki/2008_Georgia_sugar_refinery_explosion

The 2008 Georgia sugar refinery explosion was an industrial disaster that occurred on February 7, 2008, in Port Wentworth, Georgia, United States. Fourteen people were killed and forty injured when a dust explosion occurred at a sugar refinery owned by Imperial Sugar. Dust explosions had been an issue of concern among United States authorities since three fatal accidents in 2003, with efforts made to improve safety and reduce the risk of recurrence.

[eric2011 (OP)]

If I use a charcoal furnace and after I use it to melt something but I want to annael it for couple days inside the charcoal furnace, what insulation material is best at containing the heat for a long period of time without loosing heat?

Or if I ask it another way what charcoal foundry insulation material is best for preserving the heat inside the foundry for a long time?

[Petrochemicals]

You asked me; why not him?
Why are you still asking me about something which someone else wrote, and which is clearly wrong?

This video uses coal dust instead of charcoal dust, but I think it can represent my point.

I think most solids ability to combust is down to their fineness.

[Bored chemist]

He certainly didn't do a series of experiments at different temperatures and show that there was a change in behaviour at 40C.

Is there any other way to support a statement that flash point of charcoal is 40C?

PLWASE JUST FIND OUT WHAT "FLASH POINT" MEANS!

[Bored chemist]

If I use a charcoal furnace and after I use it to melt something but I want to annael it for couple days inside the charcoal furnace, what insulation material is best at containing the heat for a long period of time without loosing heat?

Or if I ask it another way what charcoal foundry insulation material is best for preserving the heat inside the foundry for a long time?

If you  want to keep it hot for days then you either need incredibly good insulation or a really big furnace,  or you have to keep feeding the furnace.
I don't think annealing usually takes that long.

The best lagging that you can easily get is probably rockwool.
If you want something more robust you can use perlite, glued together with sodium silicate, but that's only good up to about 700C if i remember rightly.
I have seen stuff on the net about mixing fire cement or fire clay with vermiculite.