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
Think of it like if you had a glass of bleach
You can pour the bleach out, but there is going to be drops clinging to the glass. So you fill it back up with water and pour it out again. Now there are drops but they probably aren’t bleach any more
You can’t vacuum all the air out. So if you NEED there to be no oxygen/water vapor in melter, then you are going to this style of pump/purge. Pump out the air, fill with argon, pump out again, repeat as needed
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