If they are adding it to steel then I would assume both the steel and the lead would have to be molten, right? The temp at which steel melts FAR, FAR exceeds the temperature lead does. So when the lead is mixed with the molten steel some is vaporized (and can be ingested in the system). We work at levels where lead is not vaporized. Thanks for the concern though.
There are NUMEROUS people on this forum and Castboolits forum that have their lead levels checked regularly, and as long as you keep your fingers out of your mouth while handling lead you are not gonna get poisoned from casting.
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