Dear Sir,
We are one of the exporters of copper slag.
We have the subsidiary from Africa
We can supply you copper slag from the size of 0.5 inch to 3 inch.
Our packing is in loose container
We can supply you 1000 mtn per month.
We here with attach the Chemical Analysis & Other Physical Analysis report of Slag.
Arc  furnace copper slag.
The contents are:
Au g/t : 2
Cu %: 0.9
Co %:0.3.
S%: 1.3.
Si02 %: 35
Ca0 % : 5
Mg0 %: 1.9
Fe %: 35.
the gold that can be extracted from this copper slag will be 2gm per ton.
Looking forward to the opportunity of being service to you and hoping to hear soon   from you.
.if further required you may contact us on minerals(at)atomos(dot)com