co-products?, page-2

Hi Lion King72,
From what I was able to research,
Sodium Sulfate (NaSO4) sells for about $126 per tonne
Aluminium Oxide (Al2O3) sells for around $700 per tonne and
Quartz is SiO2 and is very cheap---just sand.
So,depending on how much Al2O3 is produced, the bottom line addition would be around $1,500,000 per annum or somewhere in that order.
Just an estimate--the actual may be higher.
Cheers