Watched a film last night about some bank robbers, Anyway it made remember the MOD using these things to burn concrete bases out, if your not sure what they are here's the you tube link, there basically oxegen+iron!!......Has anyone ever had a go????
Apparently it is a tool which is a consumable iron bar packed with carbon steel rods which are burned in a oxygen rich super heated environment. I always thought it used Thermite to burn, but although it is related to thermite, ie: aluminium powder and metal oxide which is usually ignited by magnesium or similar (we used a sparkler). I have seem this burn through a block of steel and into the concrete below, it really is ultra hot. Probably too hot for a controlable thermic lance.
Many moons ago I did a weekend commercial diver acquaint course in a freezing cold flooded dry dock within Leith Docks. Used a similar process called "Broco" a bit of practice topside, then burning off huge bolts holding simulated flanged pipe together. Awesome to watch and use, not many materials will withstand the ferocious business end of a Broco rod!!
They look just the job for burning the pins out of 360s and Dozzers.....Might have to get me one of them....havent a clue on cost, but on the mfs site there advertised as low capital outlay, so sounds good......TBH I thought they'd been made ilegal....