Abstract: In order to remove the suspension substance in the thickening overflow of copper concentrate from a copper-mulynium dressing plant for recycling, the magnetic flocculation tests were made. The tests results showed that under the conditions of PAC dosage of 250g/t, PAM dosage of 0.25g/t, magnetic powder of 2500g/t, the SS removal rate reached 97% and its turbidity decreased to 4NTU by the magnetic flocculation technique, and its efficiency can be highly improved, comparing with the traditional coagulation process. 

Key words: Thickening overflow of copper concentrate, Suspension substance, Turbidity, Magnetic flocculation