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2010•Hydrometallurgy of ChinaRequires access

Alkaline Leaching of Zinc From Oxide Ore

LU Chang-hai

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Abstract

Alkaline leaching of zinc oxide ore from Guizhou Province has been studied.Effection of some factors,such as stirring rate,ore particle size,temperature,total ammonia-ammonium concentration,leaching time and ratio of liquid to solid,on leaching of zinc are examined.The results show that leaching of zinc is about 93% in NH4Cl-NH3-H2O leaching system under the conditions of stirring rate of 300 r/min,ratio of liquid to solid of 15∶1,average ore particle size of 0.074 mm,reacting temperature of 70 ℃,total ammonia-ammonium concentration of 7.0 mol/L and reacting time of 90 min.

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What this paper is about

Alkaline leaching of zinc oxide ore from Guizhou Province has been studied.Effection of some factors,such as stirring rate,ore particle size,temperature,total ammonia-ammonium concentration,leaching time and ratio of liquid to solid,on leaching of zinc are examined.The results show that leaching of zinc is about 93% in NH4Cl-NH3-H2O leaching system under the conditions of stirring rate of 300 r/min,ratio of liquid to solid of 15∶1,average ore particle size of 0.074 mm,reacting temperature of 70 ℃,total ammonia-ammonium concentration of 7.0 mol/L and reacting time of 90 min.

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Available abstract

Alkaline leaching of zinc oxide ore from Guizhou Province has been studied.Effection of some factors,such as stirring rate,ore particle size,temperature,total ammonia-ammonium concentration,leaching time and ratio of liquid to solid,on leaching of zinc are examined.The results show that leaching of zinc is about 93% in NH4Cl-NH3-H2O leaching system under the conditions of stirring rate of 300 r/min,ratio of liquid to solid of 15∶1,average ore particle size of 0.074 mm,reacting temperature of 70 ℃,total ammonia-ammonium concentration of 7.0 mol/L and reacting time of 90 min.

Key concepts: Leaching (pedology), Zinc, Chemistry, Ammonia, Ammonium, Particle size, Lixiviant, Oxide

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