# The Naked Scientists Forum

### Author Topic: Can two gas torches heat a crucible to over 2000 degree Centigrade?  (Read 1150 times)

#### eric2011

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##### Can two gas torches heat a crucible to over 2000 degree Centigrade?
« on: 01/03/2016 11:44:08 »
Hello

If I take two small mapp gas torches and start them up, and put a crucible between them, by the combine power will they produce at least 2100 C? If I put something with a melting point of 2000 inside the crucible will it melt?
« Last Edit: 01/03/2016 17:33:52 by chris »

#### chiralSPO

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##### Re: Mapp gas question
« Reply #1 on: 01/03/2016 14:28:16 »
Not necessarily. The temperature of the contents of the crucible will depend on the rate of energy coming in and the ability of the crucible to radiate thermal energy. If the crucible has a small surface area, and cannot radiate heat efficiently then it will heat up to very nearly the temperature of the flames. But imagine, for instance, trying to heat a ridiculously huge flower pot of a crucible. It might not ever get hotter than a couple hundred degrees before it can radiate all of the incoming heat...

#### eric2011

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• Posts: 15
##### Re: Mapp gas question
« Reply #2 on: 01/03/2016 15:06:07 »
The crucibles lenth is like a 7 year boys piners. So its small

#### eric2011

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• Posts: 15
##### Re: Mapp gas question
« Reply #3 on: 01/03/2016 15:12:24 »
The crucibles lenth is like a 7 year boys piners. So its small

The crucible is 0.3 inch thick

#### chiralSPO

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##### Re: Mapp gas question
« Reply #4 on: 01/03/2016 15:19:59 »
The crucibles lenth is like a 7 year boys piners. So its small
If we're going to to talk science, I suggest we use well-defined units of measurement. Inches, centimeters, even cubits. I don't want to have to convert the Stephan-Boltzmann constant into units of (skittle energy content) times (resting heart rate of a baby sloth) per (7-year-old's penis)2 per (absolute fraction of a bad fever)4 that's just stupid...
« Last Edit: 01/03/2016 20:41:29 by chiralSPO »

#### eric2011

• Jr. Member
• Posts: 15
##### Re: Mapp gas question
« Reply #5 on: 01/03/2016 15:37:19 »
Chiral I dont think u have any experience with mapp gas.  I will find an answer somewhere else.

MOD EDIT: I have removed abusive and homophobic language from your post. Difference of opinion is fine, but ad hominem attacks and offensive language are not permitted on this forum.
« Last Edit: 01/03/2016 19:23:14 by chiralSPO »

#### chiralSPO

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##### Re: Can two gas torches heat a crucible to over 2000 degree Centigrade?
« Reply #6 on: 01/03/2016 20:40:25 »
You're right. I have not ever used mapp gas. I typically use propane (with or without added O2), and if I need to melt quartz, I use an oxygen-hydrogen torch.

Feel free to look for answers elsewhere--just be prepared to describe more effectively what you are trying to do...

#### The Naked Scientists Forum

##### Re: Can two gas torches heat a crucible to over 2000 degree Centigrade?
« Reply #6 on: 01/03/2016 20:40:25 »