How to mitigate welding fume is a big topic. People, by instinct, oftentimes say, "Oh, I'll put a mask on and that'll be sufficient"
Now, however, there is a systematic approach that's been used by OSHA or any health and safety offices. Now, the approach is to start looking at the process, and starting at the bottom of mitigation pyramid and systematically moving up.
Eliminating or Substituting the Weld Process
The first question to ask is if it is possible to eliminate or substitute the process that's causing the fume? Obviously, most of the time it's not possible to remove welding from the operation. But it's worth considering if you are using stick welding or flux core welding whether you can substitute this process for a better process as far as smoke creation?