This is kind of a cross over of my oil burners with teh metal casting guys and the scrappers.
Many of the casting guys use scrap and melt it down and do purify or alloy it to different materials before casting it.



What do you mean Contain the burn off from the oil?
Are you talking about emissions from the oil burning itself or what is being melted?
The burners I build when running properly run perfectly clean. I have one Vid where my first fire up of a burner with the only weak blower I had on hand was rather smokey. No matter how many times I explain this and link to other vids of it running clean, I still get idiots crapping on about emissions like it was an oil well burning. Normaly, as can be seen on my vids, the only thing coming out of the burners is hot air.

As far as what the material being melted produces, that's not a big issue either. The burners will run with excess air quite happily. I melted down a computer the other day and saw very little smoke even though there was a fair bit of plastic in the thing. If you have air and turbulance, You will have little somke because smoke is just unburnt gasses and if you burn them with sufficent oxygen, they are totaly clean. I was thinking of a secondary air supply for the furnace for this reason. Introduce more air after the melt zone before the exhausts escapes and burn whatever smoke is left.
A lot of the plastic etc actually adds to the heat which means the burner can be backed down giving more air to burn the material from the item being melted.

If there was something else you were thinking of, could you please explain what it was?