I just watched this (https://youtu.be/jLX1-tNnvEo?t=897)(14:57) and the guy in the video used vacuum and argon gas to remove any oxygen from the melter but I don’t understand why is the argon used if you are already vacuuming all the air out anyway?
In: Chemistry
Same way sand could be used to displace the water in a pool.
Argon is heavier than regular air. So you pump in argon and to folks up the space, pushing the air out.
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