Treatment Of Copper Flash Smelter Flue Dusts For Copper And Zinc Extraction And
Hydrometallurgy 105 (2010) 148–154
Contents lists available at ScienceDirect
Hydrometallurgy j o u r n a l h o m e p a g e : w w w. e l s ev i e r. c o m / l o c a t e / h yd r o m e t
Treatment of copper flash smelter flue dusts for copper and zinc extraction and arsenic stabilization
A. Morales a, M. Cruells b, A. Roca b,⁎, R. Bergó b a b
Universidad Católica del Norte, Department of Metallurgical Engineering, Antofagasta, Chile
Universitat de Barcelona, Department of Materials Science and Metallurgical Engineering, Faculty Chemistry, Barcelona, Spain
a r t i c l e
i n f o
Article history:
Received 14 June 2010
Received in revised form 2 September 2010
Accepted 2 September 2010
Available online 9 September 2010
Keywords:
Copper smelter dusts
Arsenic stabilization
Copper and zinc extraction
a b s t r a c t
A flue dust sample of copper from flash smelting furnace has been extensively characterized. The main phases of the dusts are magnetite, cuprospinel, chalcocyanite, zincosite, dolerophanite, and claudetite. As minor phases, tenorite, arsenolite, delafossite and enargite were detected. In the sample studied, particles were mainly spherical and less than 60 μm. The leaching of flue dust sample with water dissolved copper sulfates and zinc sulfates and, partially, arsenic oxides, in an exothermic process. The leaching of the residue after water leaching in several acid media increased the dissolution of copper and arsenic oxides and small amounts of zinc. A preliminary study by hydrocyclone classification was carried out with the objective of to obtain two fractions: a coarse fraction rich in copper and a fine fraction rich in arsenic. However, results obtained in this sample were not very successful. In the stabilization study, the residue obtained after leaching the copper flash smelter flue dust with sulfuric acid was mixed with sludge from a paper factory (coinertization process). The smaller size fraction (N 12 μm) obtained in the hydrocyclone was also mixed
Contents lists available at ScienceDirect
Hydrometallurgy j o u r n a l h o m e p a g e : w w w. e l s ev i e r. c o m / l o c a t e / h yd r o m e t
Treatment of copper flash smelter flue dusts for copper and zinc extraction and arsenic stabilization
A. Morales a, M. Cruells b, A. Roca b,⁎, R. Bergó b a b
Universidad Católica del Norte, Department of Metallurgical Engineering, Antofagasta, Chile
Universitat de Barcelona, Department of Materials Science and Metallurgical Engineering, Faculty Chemistry, Barcelona, Spain
a r t i c l e
i n f o
Article history:
Received 14 June 2010
Received in revised form 2 September 2010
Accepted 2 September 2010
Available online 9 September 2010
Keywords:
Copper smelter dusts
Arsenic stabilization
Copper and zinc extraction
a b s t r a c t
A flue dust sample of copper from flash smelting furnace has been extensively characterized. The main phases of the dusts are magnetite, cuprospinel, chalcocyanite, zincosite, dolerophanite, and claudetite. As minor phases, tenorite, arsenolite, delafossite and enargite were detected. In the sample studied, particles were mainly spherical and less than 60 μm. The leaching of flue dust sample with water dissolved copper sulfates and zinc sulfates and, partially, arsenic oxides, in an exothermic process. The leaching of the residue after water leaching in several acid media increased the dissolution of copper and arsenic oxides and small amounts of zinc. A preliminary study by hydrocyclone classification was carried out with the objective of to obtain two fractions: a coarse fraction rich in copper and a fine fraction rich in arsenic. However, results obtained in this sample were not very successful. In the stabilization study, the residue obtained after leaching the copper flash smelter flue dust with sulfuric acid was mixed with sludge from a paper factory (coinertization process). The smaller size fraction (N 12 μm) obtained in the hydrocyclone was also mixed
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