Pressure leaching of zinc silicate ore in sulfuric acid medium

• Published in: Transactions of Nonferrous Metals Society of China Vol. 20; no. 5; pp. 918 - 923
• Main Author: 李存兄 徐红胜 邓志敢 李兴彬 李旻延 魏昶
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.05.2010; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
• Subjects: Dissolution; dissolution of silica; Extraction; extraction of zinc; Pressure leaching; Quartz; Silicon dioxide; Sulfuric acid; sulfuric acid pressure leaching; Zinc; zinc silicate ore; Zinc silicates; 二氧化硅; 反应时间; 氧化矿物; 浸出渣; 硅酸盐矿石; 硫酸介质; 硫酸浓度; 锌矿石; sulfuric acid pressure leaching; extraction of zinc; dissolution of silica; zinc silicate ore
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(09)60236-3

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.