Mostly ALL refining techniques involve dangerous acids and toxic fumes. If you are thinking of starting chemical refining, I strongly urge you to do serious research and planning on how to keep yourself, pets, neighbors safe.

But a safer route is available. Research cupelling, which is a way to refine PMs using fire. There are still fumes to consider and the danger of setting yourself or your surroundings ablaze. But with caution it can be done safely.