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Guru

Join Date: Oct 2009
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Titanium Ingot

06/11/2018 2:38 PM

Our local newspaper is not noted for its accurate reporting, so I was somewhat baffled by a recent account of a disaster in which a 8 tonne titanium ingot slipped from its fastenings as it was being removed from the furnace. It damaged the furnace and there was an explosion related to the "sodium potassium" coolant.

Two questions:

Why would anyone want to form an 8 tonne titanium ingot in the first place?

Was it really a mixture of sodium and potassium being used as a coolant?

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Guru

Join Date: Mar 2007
Location: at the beach in Florida
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#1

Re: Titanium ingot

06/11/2018 3:01 PM

No clue, but they come even bigger...Probably for a rocket engine...

https://minerals.usgs.gov/minerals/pubs/commodity/titanium/mcs-2017-titan.pdf

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Engineering Fields - Manufacturing Engineering - New Member Engineering Fields - Mechanical Engineering - New Member

Join Date: Apr 2008
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#2
In reply to #1

Re: Titanium ingot

06/11/2018 3:10 PM

Those ingots get rolled into plate, billet (round and square), and coil to name a few configurations. And yes, they do get bigger.

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#3

Re: Titanium Ingot

06/11/2018 3:24 PM

I used to work near the TIMET titanium processing plant in Henderson / Las Vegas and I have seen ingots a lot bigger than that but typically they are titanium sponge that is shipped to a processor for final shaping or forging. 8 tons is 16000 lbs and most of the time I see the tractor trailers with 4 or less so they don't go heavier than their 80000 lb road limit.

As for the coolant??? All I know is that every once in a while, Timet will have a chlorine gas leak that turns the sky green. One of their worst leaks defoliated thousands of trees in the vicinity of their plant.

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Engineering Fields - Electrical Engineering - Been there, done that, still doing it. Engineering Fields - Control Engineering - New Member

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#4

Re: Titanium Ingot

06/11/2018 3:42 PM

Sodium Potassium alloy is a common liquid metal coolant. It has an excellent heat transfer. It does not react with steel and being a metal a seamless electromagnetic pump can be used for circulation. For obvious reasons moisture will be a concern but at the temperatures to melt titanium steam production should be avoided anyway.

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Guru

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#5

Re: Titanium Ingot

06/11/2018 4:15 PM

A sodium-potassium eutectic is used as a coolant in titanium furnaces. Liquid metal is used instead of water to avoid a possible water/steam explosion.

Titanium : Physical Metallurgy, Processing, and Applications

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Guru

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#6

Re: Titanium Ingot

06/11/2018 5:42 PM

Don't worry, Ti. is really light.

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Guru

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#7

Re: Titanium Ingot

06/12/2018 12:05 AM

Just for perspective, Ti is about 4.5 g/cc ...

That means 2 metric tons (tonnes) of Titanium would be a sphere with around 0.75 m radius or a cube a little over 1.2 m on a side.

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#9
In reply to #7

Re: Titanium Ingot

06/12/2018 11:16 AM

Oops!

The density of about 4.5g/cc is correct, so one cubic meter would have a mass of ≈4.5 tonnes, and 2 tonnes would have a volume of 2/4.5= 0.44 m3. The cube would be ≈0.76m on a side, and the sphere would be ≈1.02m in diameter.

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Guru

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#10
In reply to #9

Re: Titanium Ingot

06/13/2018 11:18 AM

oops is right. i wasn't watching what I was doing apparently. My calculation doesn't pass common sense test. It almost looks like I transposed the answers and added an erroneous zero. weird.

Thank you.

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Guru

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#8

Re: Titanium Ingot

06/12/2018 7:52 AM

Thank you, all. I consider myself now as having been better informed.

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