Sciencemadness Discussion Board
Not logged in [Login ]
Go To Bottom

Printable Version  
Author: Subject: Thermite Cutting Torch
specialactivitieSK
Hazard to Self
**




Posts: 94
Registered: 21-10-2014
Member Is Offline

Mood: No Mood

[*] posted on 21-8-2021 at 10:45
Thermite Cutting Torch


I tried to make a Thermite Cutting Torch from patent https://patents.google.com/patent/WO2003006198A1/en

From the patent :

Preferably is a powder composition which comprises by weight from about 15% to 20% aluminum, from about 78% to 85% CuO, from about 1% to 3% SiC, and from about 0.2% to 4% nitrocellulose. The composition of the powder in the thermite charge 14 more preferably may include parts by weight about 16% to 18% aluminum, about 80% to 83% CuO, about 1% to 2% SiC, and about 0.5% to 2% nitrocellulose.
_____________________________________

used :
CuO : 80 %
Al : 16 %
NC : 4 % (from smokeless powder : NC 60%, DeGDN 35% )
(12.6%N)
_____________________________________

Visco fuse with vesuvit dont ignited the composition. Than I used sparkle from the top. Better would by the other side.

The result was a explosion.
_____________________________________

Video : https://www.youtube.com/watch?v=LPhrmw_C_w8

[Edited on 21-8-2021 by specialactivitieSK]

1.jpg - 176kB

[Edited on 21-8-2021 by specialactivitieSK]

[Edited on 21-8-2021 by specialactivitieSK]
View user's profile View All Posts By User
Johnny Cappone
Hazard to Self
**




Posts: 74
Registered: 10-12-2020
Location: Brazil
Member Is Offline


[*] posted on 21-8-2021 at 14:59


Thermite based on CuO and aluminum is known to be especially explosive. In fact, it is used as an alternative to explosive targets in shooting practice. A .22lr shot is enough to detonate it. I believe that adding nitrocellulose would only make the mixture even more sensitive.
By the way, you got a nice explosion in the video. I would say this is a pretty ineffective mixture to use in a cutting torch, unless the intent is to cut the space between your palm and fingers :D




View user's profile Visit user's homepage View All Posts By User
XeonTheMGPony
International Hazard
*****




Posts: 1640
Registered: 5-1-2016
Member Is Offline

Mood: No Mood

[*] posted on 22-8-2021 at 04:55


Thermite when used for that purpose needs very high loading pressures. he must have had a air pocket some where.

NC acts to cool the burn, not sensitize
View user's profile View All Posts By User
JohnDoe13
Harmless
*




Posts: 33
Registered: 3-2-2017
Member Is Offline

Mood: No Mood

[*] posted on 22-8-2021 at 08:00


http://www.sciencemadness.org/talk/viewthread.php?tid=22599#...
View user's profile View All Posts By User
Brightthermite
Hazard to Others
***




Posts: 133
Registered: 26-6-2019
Member Is Offline


[*] posted on 24-8-2021 at 19:03


Ive read that Barium nitrate is used in some of the cutting compositions. https://en.wikipedia.org/wiki/Thermate
View user's profile View All Posts By User
ShotBored
Hazard to Others
***




Posts: 124
Registered: 19-5-2017
Location: Germany
Member Is Offline

Mood: No Mood

[*] posted on 25-8-2021 at 11:34


Quote: Originally posted by XeonTheMGPony  
Thermite when used for that purpose needs very high loading pressures. he must have had a air pocket some where.


Exactly what I was thinking. Consolidation pressures for thermite cutters are very high. To give you an idea, a rod cutting torch I make is pressed at 4 to 4.5 tons of pressure on a hydraulic press.
View user's profile View All Posts By User
specialactivitieSK
Hazard to Self
**




Posts: 94
Registered: 21-10-2014
Member Is Offline

Mood: No Mood

[*] posted on 26-8-2021 at 01:22


This looks simple : Breach Pen

https://youtu.be/3Cuu8tG4wLM

Fire Pen

https://youtu.be/m5v__1Od4wA

[Edited on 26-8-2021 by specialactivitieSK]
View user's profile View All Posts By User
specialactivitieSK
Hazard to Self
**




Posts: 94
Registered: 21-10-2014
Member Is Offline

Mood: No Mood

[*] posted on 27-8-2021 at 23:30


TEC Torch. It looks they use pellets. Thats better for pressing.

[Edited on 28-8-2021 by specialactivitieSK]

Screenshot_20210828-092430.png - 594kB
View user's profile View All Posts By User
Junk_Enginerd
Hazard to Others
***




Posts: 251
Registered: 26-5-2019
Location: Sweden
Member Is Offline


[*] posted on 28-8-2021 at 23:27


Quote: Originally posted by Brightthermite  
Ive read that Barium nitrate is used in some of the cutting compositions. https://en.wikipedia.org/wiki/Thermate


Make sense. Barium nitrate is what is used in sparklers IIRC, and they burn pretty much as I would want a cutting torch to burn.
View user's profile View All Posts By User
Fulmen
International Hazard
*****




Posts: 1721
Registered: 24-9-2005
Member Is Offline

Mood: Bored

[*] posted on 28-8-2021 at 23:38


Quote: Originally posted by specialactivitieSK  

Breach Pen

https://youtu.be/3Cuu8tG4wLM


Wow. Almost as fast as a battery powered angle grinder...




We're not banging rocks together here. We know how to put a man back together.
View user's profile View All Posts By User
Nitrosio
Hazard to Self
**




Posts: 57
Registered: 31-3-2018
Member Is Offline

Mood: No Mood

[*] posted on 29-8-2021 at 00:46


Thermic Lancing:

https://www.youtube.com/watch?v=dt4v-vulKpEThermic Lancing


KClO4 + Mg = KCl + MgO + 1.5 O2
2 Fe + 1.5 O2 = Fe2O3
View user's profile View All Posts By User
specialactivitieSK
Hazard to Self
**




Posts: 94
Registered: 21-10-2014
Member Is Offline

Mood: No Mood

[*] posted on 7-7-2022 at 23:48


Portable metal cutting pyrotechnic torch 1800°C
US20030145752A1

CuO : 46%
Cu2O : 31%
NaClO3 : 12%
Aluminium : 11%
Binder 1%
Component are smaller than 10 mikrometer

Binder : 0-6%
Polyethylene glycol or Polyurethane polymer and epoxy curing agent.

Screenshot_20220708_091127.jpg - 92kB
View user's profile View All Posts By User
Fantasma4500
International Hazard
*****




Posts: 1681
Registered: 12-12-2012
Location: Dysrope (aka europe)
Member Is Offline

Mood: dangerously practical

[*] posted on 24-7-2022 at 04:48


thermite cutting charges have been used but thats very controversial, iirc it was a barium composition, thermate?

instead of CuO+Al, maybe MgAl+Fe2O3
i believe the trick is to use the right particle size
depending on actual grainsize you wanna modify it maybe with an oil or something that prevents it from shooting through the air inbetween the granules

the first thing you mentioned.... i think they added nitrocellulose as a binder, not just dry powder
i remember a thread on here where a man mentioned he had a cup of some CuO Al mixture with NC, supposedly dinitrate, he had about 30 grammes of it and ignited it by fuse- it ended up detonating, i could never replicate this. engine oil should work, its made of non-corrosive oil which you wanna keep in check if youre using easily corroded metals
i can get you chunks of MgAl50 if you wanna play around with mesh size




~25 drops = 1mL @dH2O viscocity - STP
Truth is ever growing - but without context theres barely any such.

https://en.wikipedia.org/wiki/Solubility_table
http://www.trimen.pl/witek/calculators/stezenia.html
View user's profile View All Posts By User
Herr Haber
International Hazard
*****




Posts: 1236
Registered: 29-1-2016
Member Is Offline

Mood: No Mood

[*] posted on 7-8-2022 at 19:17


I can confirm that if used as a binder it'll slow burning.
Tried that in a tin can with NC dissolved in acetone "just to see what would happen".
I remember it being so slow it was really unimpressive.




The spirit of adventure was upon me. Having nitric acid and copper, I had only to learn what the words 'act upon' meant. - Ira Remsen
View user's profile View All Posts By User
Fantasma4500
International Hazard
*****




Posts: 1681
Registered: 12-12-2012
Location: Dysrope (aka europe)
Member Is Offline

Mood: dangerously practical

[*] posted on 23-8-2022 at 15:00


yes but try taking some NC and put in aluminium foil and slowly heat it from the outside, it will detonate eventually.



~25 drops = 1mL @dH2O viscocity - STP
Truth is ever growing - but without context theres barely any such.

https://en.wikipedia.org/wiki/Solubility_table
http://www.trimen.pl/witek/calculators/stezenia.html
View user's profile View All Posts By User
Mateo_swe
National Hazard
****




Posts: 545
Registered: 24-8-2019
Location: Within EU
Member Is Offline


[*] posted on 29-8-2022 at 02:21


There is a tool called a thermic lance that is used to cut holes in very thick solid steel.
These are used when making holes in bank vault doors and similar very thick steel items.
They consist of a steel pipe about 15mm OD with strands of solid steel wire inside and in the absolute centre a single magnesium strand.
The back end of the pipe is connected to a oxygen flask (and regulator) and the front end is lit by a cutting torch.
The manesium and steel burns very hot when in a oxygen stream.
When the steel and magnesium starts to burn the lance is pushed through the bank vault door with molten steel pouring out the hole.
These thermic lances are able to make a holes in a half meter solid steel doors.
Maybe it isnt what you are looking for but is kind of related and quite intresting.
View user's profile View All Posts By User

  Go To Top