热酸浸出回收黄钾铁矾渣中有价元素  

Recovery of Valuable Elements in Jaroaite Residue by Hot Acid Leaching

作　　者：刘鹏飞[1,2] 张亦飞[1] 游韶玮 薄婧[1,2] 江小舵 

机构地区：[1]中国科学院过程工程研究所绿色过程与工程重点实验室,湿法冶金清洁生产技术国家工程实验室,北京100190 [2]中国科学院大学化学与化工学院,北京100049

出　　处：《过程工程学报》2016年第4期584-589,共6页The Chinese Journal of Process Engineering

摘　　要：实验研究了硫酸和盐酸对黄钾铁矾渣中Fe,Si,Zn,Pb的浸出工艺.结果表明,硫酸浸出黄钾铁矾渣的最佳工艺条件是反应温度95℃、反应时间2 h、搅拌速率300 r/min、硫酸浓度1.2 mol/L、液固质量比100:5,该条件下Fe,Zn的浸出率达80%.盐酸浸出黄钾铁矾渣的最佳工艺条件是反应温度95℃、盐酸浓度2.8 mol/L、搅拌速率400 r/min、反应时间1.5 h、液固质量比100:5,该条件下Fe,Zn,Pb的浸出率分别达83%,89%和99%.采用黄钾铁矾法可将浸出液中的Fe元素沉淀,所得黄钾铁矾渣进行无害化固定处理,得富含Zn元素的溶液.Sulfuric acid and hydrochloric acid were used to research leaching process of Fe, Si, Zn, Pb in jarosite residue. The results showed that sulfuric acid leaching, leaching rate of Fe, Zn reached 80% under the optimum conditions of leaching temperature of 95 ℃, reaction time of 2 h, stirring speed of 300 r/min, concentration of sulfuric acid of 1.2 mol/L and mass ratio of liquid to solid of 100：5. Hydrochloric acid leaching, leaching rate of Fe, Zn, Pb reached to 83%, 89%, 99% under the optimum conditions of leaching temperature of 95 ℃, reaction time of 1.5 h, stirring speed 400 r/min, concentration of hydrochloric acid 2.8 mol/L and mass ratio of liquid to solid 100：5. Jarosite was used to get rid of Fe in leaching solution. Jarosite residue can be fixed treatment to finally obtain zn-rich Solution.

关 键 词：黄钾铁矾渣 浸出 硫酸 盐酸 

分 类 号：TD982[矿业工程—选矿] TF803.2[冶金工程—有色金属冶金]