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In this study, nano-grade zinc oxide powder was produced through a dry/wet fusion process of zinc dross generated by a melting process using an electric furnace and collected through a dust collector. The process of recovering nano sized zinc oxide powder consists of vapor distillation to recover Zn by mixing cast iron soluble dust and cokes, selective leaching of Zn(NO3)2 through the addition of HNO3, and recovery of nano zinc oxide powder through NH3 neutralization. The vapor distillation process was maintained for 1 hour at 700°C with cast iron melting dust : cokes = 1 : 1 weight ratio. Thereafter, the deposited Zn was recovered, and the concentration of Zn and 30% HNO3 was maintained at room temperature in a 1 : 6 molar ratio, and then neutralized and dried by introducing a concentration of 28% NH3 to recover pure ZnO. Through the above process, finally, a purity of 99.99%, an average particle size of 150nm, and a plate-shaped ZnO nano powder were prepared.

Recovery of High Purity Zinc Oxide through Dry and Wet Processes from Low-Quality Dross Containing Zinc