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Author Topic: thermite ratio?  (Read 9173 times)

Offline younggun

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thermite ratio?
« on: 22/04/2006 03:50:40 »
I have magnetite powder (gatherd froum sand useing a magnet) and aluminum powder, and would like to know the aluminum to magnetite
ratio for thermite


 

Offline harryneild

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Re: thermite ratio?
« Reply #1 on: 23/04/2006 01:26:21 »
OK

reaction is as follows :  3Fe304 + 8Al    --> 9Fe     + 4Al203
RMM:                      696AMU + 216AMU --> 504AMU  + 408AMU

Ratio for magnetite:aluminium = 696:216 which is roughly 3:1

I think that this ratio will be fine. You cannot simply light thermite because it has a high activation energy. You must obtain a hotter ignition source. Im not sure if i should tell you a possibilty for one because if you has any experience, which you should have, you would have sorted this ratio out. Thermite is very dangerous.

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Offline younggun

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Re: thermite ratio?
« Reply #2 on: 23/04/2006 05:15:12 »
Thanks!
 

Offline younggun

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Re: thermite ratio?
« Reply #3 on: 25/04/2006 22:38:39 »
Sorry to ask agin but is this ratio by weight
or voloum?

          Thanks

 

Offline Cut Chemist

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Re: thermite ratio?
« Reply #4 on: 09/05/2006 03:14:40 »
I think that's a molar ratio

AMU= atomic mass unit
 

Offline Nick Meyer

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Re: thermite ratio?
« Reply #5 on: 08/06/2006 00:15:48 »
Th best method of ignition is magnesium ribbon. use it like a fuse because thermite is nasty stuf and get away fast


Nick
 

Offline Mr Andrew

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Re: thermite ratio?
« Reply #6 on: 08/06/2006 20:41:52 »
You should probably have a longer fuse of rope or something connected to the Mg because this stuff can melt through almost anything.  My chemistry teacher did a demonstration and the thermite burnt a hole in the slate countertop the size of a fist--and he didn't use very much.

Don't run this reaction on your front lawn, that probably wouldn't make your parents/neighbors/local fire department very happy.:(

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The Naked Scientists Forum

Re: thermite ratio?
« Reply #6 on: 08/06/2006 20:41:52 »

 

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