Producers run a small amount of it at high temperatures, which they then let cool off for a few minutes.
In nanoseconds, they have enough to fill a bag or two.
At this point the machine has been turned up and is running full speeds ahead, creating CPU as quickly as possible.
It can take hours at peak capacity before you will have enough metal to make a processor – but only seconds later the whole process starts over again with another section of steel sheet. It’s all done by hand too! In that time they’ll likely have taken up their tools and be cutting into new material that’s not yet made processors.