Processing Of Copper Converter Slag For Metal Reclamation. Part I: Extraction And Recovery Of Copper And Cobalt  

Oleh:

Deng, Tong ; Ling, Yunhan

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Waste Management & Research vol. 25 no. 5 (Oct. 2007), page 440-448.
Topik: Converter slag; cobalt; copper; sulphuric acid digestion; reclamation; wmr 668–4
Fulltext: 440.pdf (561.2KB)

Isi artikel

Clean processing of copper converter slag to reclaim cobalt and copper could be a challenge. An innovative and environmentally sound approach for recovering valuable metals from such a slag has been developed in the present study. Curing the slag with strong sulphuric acid, without re-smelting or roasting as practiced currently in the industry, render it accessible to leaching, and more than 95% of cobalt and up to 90% of copper was extracted together with iron by water leaching, leaving silica behind in a residue. The copper in the leach liquor was recovered by cementation with iron and the dissolved iron crystallized as ferrous sulphate monohydrate. The cobalt in the mother-liquor rich in iron was recovered by either cementation or sulphide precipitation. Operation variables in the new process were also investigated and optimized.

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