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How to recycle copper slag

2016-11-22View Original

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How can electrolytic zinc-copper slag be recycled? After recovering cadmium from electrolytic zinc in our factory, copper slag is produced with a composition of 28% Cu, 8% Zn, and 12% Cd. How can this slag be separated and utilized? It is best to produce copper sulfate pentahydrate (solid), zinc sulfate (liquid), and cadmium sulfate (liquid)
Reply #22016-11-22
Is it pyrometallurgical slag or hydrometallurgical slag? It’s likely impossible to leach out hydrometallurgical slag
Reply #32016-11-24
Copper, zinc, and cadmium can be leached together using a wet method, and then separated sequentially as copper, cadmium, and zinc.
Reply #42016-11-28
Hello, where is your factory located? Can this slag be sold? If I sell it. Contact me on QQ59598112
Reply #52016-12-06
Copper slag is now also classified as hazardous waste. We are working in partnership with several well-known domestic companies involved in the wet-process zinc smelting; in these processes, zinc and cadmium are extracted from copper-cadmium slag, resulting in the formation of copper slag. After cadmium is recovered from the leachate, it is returned to the zinc processing system. The treatment involves leaching the copper slag followed by copper electrowinning, and after copper is removed through electrowinning, the resulting liquid can be reused in the leaching of sulfide ore. This approach allows for the utilization of the acid produced during electrowinning, as well as the recovery of zinc and cadmium from the copper slag! As for electrowinning technology, we employ a turbulent electrowinning process, which reduces the requirements regarding the concentration of impurity ions in the leachate.
Reply #62016-12-06
The treatment process involves leaching copper slag followed by electrowinning of copper; the liquid resulting from copper removal through electrowinning can be reused in the leaching of roasted ore, thereby allowing the use of the acid produced during electrowinning as well as the recovery of zinc and cadmium from the copper slag! After leaching, copper can be crystallized using a crystallization method.

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