Welding accident

[Disco_owner]

While looking around you tube for welding vids , I came across this Vid:eek:

watch the bloke welding , he'd just finished welding ........then Booom.

YouTube - Welder Incident (http://au.youtube.com/watch?v=1WZsGk34DoU)

Please Note!

GRAPHIC CONTENT in video..

[mcrover]

I wonder what caused that, maybe he was welding something under pressure?

[Xavie]

freakin hell poor guy.

[spudboy]

Looks like the explosion took off his head - literally.. Hope it was only his helmet, but it didn't look good :(

[BMKal]

This clip was floating around the mining industry some time ago.

From memory, I don't think that he is welding - but attempting to cut out a piece of tramp steel which is jammed inside a crusher. The machine he is sitting in is a large Primary Gyratory Crusher.

When a piece of metal becomes jammed in a gyratory or cone crusher, it is under immense pressure. If the crusher mainshaft (centre or conical section) cannot be lowered to reduce the pressure and release the tramp metal, the only way to release it is to cut it out. Unfortunately, this can often result in a sudden release of pressure, and the molten metal that was being cut can shoot out of the crushing chamber in any direction.

I've seen it done many times - worst example is usually with mill balls (steel balls). You normally try to put as much distance between the boilermaker and the piece of metal being cut as possible, usually by using a long cutting lance.

From memory - this incident occurred in the Pilbara at one of the Iron Ore mines, and the boilermaker was seriously injured.

[Fusion]

Bloody Hell :eek::eek::eek::eek: .

[rijidij]

Years ago my metalwork teacher showed us a picture of an acetalene bottle that had exploded when a guy tried to weld a handle on the side of it......and get this........it was the bottle he was using to do the welding with.:eek: The bottle was spread wide open, and the guy lost his leg.

[Disco_owner]

Years ago my metalwork teacher showed us a picture of an acetalene bottle that had exploded when a guy tried to weld a handle on the side of it......and get this........it was the bottle he was using to do the welding with.:eek: The bottle was spread wide open, and the guy lost his leg.


:eek::eek: wholly smoke , I've heard blokes doing some dumb things but this one takes the cake.

[stuee]

This clip was floating around the mining industry some time ago.

From memory, I don't think that he is welding - but attempting to cut out a piece of tramp steel which is jammed inside a crusher. The machine he is sitting in is a large Primary Gyratory Crusher.

When a piece of metal becomes jammed in a gyratory or cone crusher, it is under immense pressure. If the crusher mainshaft (centre or conical section) cannot be lowered to reduce the pressure and release the tramp metal, the only way to release it is to cut it out. Unfortunately, this can often result in a sudden release of pressure, and the molten metal that was being cut can shoot out of the crushing chamber in any direction.

I've seen it done many times - worst example is usually with mill balls (steel balls). You normally try to put as much distance between the boilermaker and the piece of metal being cut as possible, usually by using a long cutting lance.

From memory - this incident occurred in the Pilbara at one of the Iron Ore mines, and the boilermaker was seriously injured.

Sounds like a good case for automation. I've just finished a project at uni that automates the racking process during removal or installation of a circuit-breaker (for reasons why look up "arc flash" on u-tube). Sounds like a pretty straight forward process to automate. Its just whether or not companies are willing to invest in the expense.

Out of curiosity how long are the cutting lances they use (the extended ones)??

[BMKal]

Out of curiosity how long are the cutting lances they use (the extended ones)??

The ones that I've seen are usually about three or four feet long. In theory, they could be any length you like - it's just a matter of how well you can control the position of the flame at the other end.

[Bigbjorn]

What is "tramp steel" and how does it get into a crusher? I assume the crusher is for crushing ore. Likewise the mill balls. How do they escape the ball mill drum and get into something they can jam?

[CraigE]

Tramp steel is any garbage that comes in with the ore from the mine or from clean up around the plant. Metal detectors, magnets etc are used to try and eliminate it before it gets to the crushers, though usually in big gyratory's is not a concern but can jam them as seen. Normally more in cone crushers thoug. I have spent plenty of time unbogging crushers like this. Usually a long cutting lance is used to put as much distance as possible between the object and the person cutting out. Also a good idea to back off the crusher springs. The worst items are bogger / loader teeth and scrapper blocks.
I got the incident report for this one some time ago and it is his helmet not his head. He did receive serious injuries however from memory he survived.
Cheers
Craig