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Waste Management & Research
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Production of brown and black pigments by using flotation waste from copper slag

Emel Ozel

Anadolu University, Department of Material Science and Engineering, Iki Eylul Campus, Eskisehir, Turkey, eozel{at}anadolu.edu.tr

Servet Turan

Anadolu University, Department of Material Science and Engineering, Iki Eylul Campus, Eskisehir, Turkey

Semra çoruh

Ondokuz Mayis University, Department of Environmental Engineering, Samsun, Turkey

Osman Nuri Ergun

Ondokuz Mayis University, Department of Environmental Engineering, Samsun, Turkey

One of the major problems in copper-producing countries is the treatment of the large amount of copper slag or copper flotation waste generated from copper slag which contains significant amounts of heavy metals such as Cu, Zn, Pb and Co. Dumping or disposal of such large quantities of flotation waste from copper slag causes environmental and space problems. In this study, the treatment of flotation waste from copper slag by a thermal method and its use as an iron source in the production of inorganic brown and black pigments that are used in the ceramic industry were investigated. The pigments were produced by calcining different amounts of flotation waste and chromite, Cr2O3, ZnO and CoO mixtures. The pigments obtained were added to transparent ceramic glazes and porcelainized tile bodies. Their colours were defined by L*a*b* measurements with a spectrophotometer. The results showed that flotation waste from copper slag could be used as an iron source to produce brown and black pigments in both ceramic body and glazes.

Key Words: Industrial waste • thermal treatment • colour • ceramic pigments • spinels • wmr 931-3

Waste Management & Research, Vol. 24, No. 2, 125-133 (2006)
DOI: 10.1177/0734242X06062690
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