Studies on the Preparation of Zinc Oxide from Galvanizing Plant Waste

M Mahbubur Rahman¹, Md. Rakibul Qadir¹, AJM Tahuran Neger¹ and ASW Kurny^2,

¹Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka

²Bangladesh Universities of Engineering and Technology (BUET), Dhaka

Cite this paper:
M Mahbubur Rahman, Md. Rakibul Qadir, AJM Tahuran Neger and ASW Kurny. Studies on the Preparation of Zinc Oxide from Galvanizing Plant Waste. American Journal of Materials Engineering and Technology. 2013; 1(4):59-64. doi: 10.12691/materials-1-4-1

Abstract

Galvanizing plant waste (zinc dross) containing 27.66% zinc was leached in HCl solutions. Zinc in solution was precipitated as Zn(OH)₂ by adding ammonium hydroxide. The product was characterized by atomic absorption spectroscopy, thermogravimetric analysis, x-ray diffraction analysis, and scanning electron microscopy. X-ray diffraction analysis confirmed that when heated at 500^oC, the product possesses hexagonal zincite structure. Scanning electron microscopy confirmed that the shape of zinc oxide particles was spherical and compares well with the standard product. A maximum of 93.7% zinc contained in the dross could be extracted and converted to zinc oxide having a purity of 98.8%.

Keywords:
galvanizing plant waste zinc dross acid-leaching zinc oxide

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