| "Rich material " is a rich mixture with tellurium and precious metals,which is produced in the process of copper anode slime by enrichment . This article put forward a technology of separation of high-grade tellurium and precious metals from the rich material effectively, under the premise of precious metals without oxidation.Rich material mixed with Na2CO3 uniformly,calcined at 300℃ for 7h,then Te leaching in NaOH solution, precious metals little is oxidized to remain in the slag, and finally recovered tellurium and precious metals.Under optimal conditions, tellurium recovery is 95%, so that more effective recovery of tellurium and precious metals is come ture. |