Analysis and Recycling of Lead-Based Slag from Battery Waste for Tiles Production
Department of Science, Technology and Mathematics Education Nasarawa State University, Keffi (Nigeria)
DOI : http://dx.doi.org/10.13005/msri/030211
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This paper unveils a measure of risk management through waste minimization from recycling process of a hazardous waste. Lead-based slag from Exide Battery Nigeria Limited, Ibadan containing heavy metals with the following concentration value on analysis: Pb = 266028ppm, Fe=55871ppm, Sb = 7962 ppm, Cu = 500ppm, Mn=292ppm, and Zn=151ppm was recycled to produce glazed tiles. The slag was finely ground and mixed with clay in varying proportions; kaolin, feldspar, CaCO3, ZnO, Na2SiO4, CaSO4.2H2O, CaO, Chamotte and bentonite were also added in varying quantities before mixing. The mix was casted under pressure and dried. The brisque temperature was around 800oC for 8 hours. The produced tiles had a white to brown colour before firing and ash-green colour after glazing. The tiles showed high abrasion resistance, good compact strength and are of a quality comparable to encaustic tiles.
KEYWORDS:Lead-based slags; hazardous waste; heavy metals and glazed tiles
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641 Accepted on: 29 Oct 2005
