Dear TomCam

Welcome back.  Thanks for posting.

To answer your question about black dross vs white dross processing you might find it surprising that Drosrite is equally efficient at processing black dross as it is white dross. In fact, the Drosrite technology has been chosen in the past for projects processing a mixture of the two dross classifications. The value proposition is essentially the same, on-site operation and significantly increased aluminum recovery rates. The only difference is that black dross is typically already contaminated with salt at the source, which is unfortunate given the fact that Drosrite does not require salt in its operation. However, unlike legacy technologies, when we treat black dross with Drosrite, no additional salts are added to the batch and therefore the material remains less hazardous and easier to manage post processing.  

Hope that Helps,

Peter