Pressure leaching of zinc silicate ore in sulfuric acid medium  

作　　者：李存兄 徐红胜 邓志敢 李兴彬 李旻廷 魏昶 

机构地区：[1]Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology

出　　处：《Transactions of Nonferrous Metals Society of China》2010年第5期918-923,共6页中国有色金属学报（英文版）

基　　金：Project(2007CB613605) supported by the National Basic Research Program of China

摘　　要：Zinc silicate ore was characterized mineralogically and the results showed that zinc exists mainly as hemimorphite and smithsonite in the sample.Sulfuric acid pressure leaching of zinc silicate ore was carried out to assess the effect of particle size,sulfuric acid concentration,pressure,reaction time and temperature on the extraction of zinc and the dissolution of silica.Under the optimum conditions employed,up to 99.25% of zinc extraction and 0.20% silica dissolution are obtained.The main minerals in leaching residue are quartz and small amounts of undissolved oxide minerals of iron,lead and aluminum are associated with quartz.Zinc silicate ore was characterized mineralogically and the results showed that zinc exists mainly as hemimorphite and smithsonite in the sample. Sulfuric acid pressure leaching of zinc silicate ore was carried out to assess the effect of particle size, sulfuric acid concentration, pressure, reaction time and temperature on the extraction of zinc and the dissolution of silica. Under the optimum conditions employed, up to 99.25% of zinc extraction and 0.20% silica dissolution are obtained. The main minerals in leaching residue are quartz and small amounts of undissolved oxide minerals of iron, lead and aluminum are associated with quartz.

关 键 词：zinc silicate ore sulfuric acid pressure leaching extraction of zinc dissolution of silica 

分 类 号：TF041[冶金工程—冶金物理化学]