HELP!! How do you extract aluminum chips from brass turnings?

Question

I run a small CNC Transfer Machine shop and I have 8000lbs of Brass turnings that have trace amounts of aluminum chips in it and I need to extract the aluminum out so that I can get full value for the brass. One of my set up tech's forgot to clean out the machine before switching to brass and now I have aluminum in with my brass. The problem is this. If I send this brass to the smelter than I will loose half the value if it is contaminated with any other elements. Pure clean brass turnings is worth $1.40/lb (8000x1.40= $11,200.00) If I send it with aluminum I'll only get $5,600.00. Please help. Neither metals are magnetic and aluminum doesn't float.

Answer 1

Using magnets.