I found a little information about smelting security at (www.imperialproducts.com) in their Refining & Assay section. I would have copied and pasted the paragraphs about their security protocol but the site won't let me...I'm not real computer savvy, so perhaps I screwed up trying...I hope this helps.

I'll see if I can find a more detailed explaination because this company's info is limited.

Best Regards