某难处理高硅氧化锌矿加压酸浸工艺  

Study on Pressure Acid Leaching Technique of a Refractory High Silicon Zinc Oxide Ore

作　　者：杨秀丽[1] 魏昶[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,云南昆明650093

出　　处：《矿冶工程》2009年第5期65-69,共5页Mining and Metallurgical Engineering

基　　金：973计划资助(2007CB613605)

摘　　要：以某高硅氧化锌矿为研究对象,在加压酸性体系下,分析了起始酸度、浸出温度、釜内压力、浸出时间及液固比等因素对锌浸出率、二氧化硅浸出率和产液速率的影响。结果表明:在矿样粒度-0.105 mm粒级占85%以上、起始酸度90.16 g/L、浸出温度120℃、釜内压力1.2 MPa、浸出时间90 min、液固比5∶1、搅拌速度550 r/min的条件下,可使锌的浸出率达到98.54%以上,二氧化硅的浸出率低于1.02%,产液速率不低于941 L/(m2.h)。对浸出产物进行XRD和SEM分析表明,经历浸出过程,浸出残渣表面相对浸出前变化很大。The effects of initial acid value, leaching temperature, still pressure, leaching time and liquid-solid ratio on the leaching rate of Zn and SiO2 and product liquid rate were analyzed under pressure acid system with a high silicon zinc oxide ore as the object of study. The results show that on the conditions that the ore samples in which the particle size is -0. 105 mm above 85% , the initial acid value is 90.16 g/L, leaching temperature is 120 ℃, still pressure is 1.2 MPa, leaching time is 90 min, liquid-solid ratio is 5：1 and the rate of agitation is 550 r/min, the leaching rate of Zn is 98.54% and the leaching rate of SiO2 is below 1.02% respectively, and the product liquid rate is no less than 941 L/（m^2 · h）. Analyses on the leaching products by XRD and SEM indicate that through leaching process the surface of leach residues differs much from that before leaching.

关 键 词：高硅氧化锌矿 加压酸浸 过滤性能 浸出工艺 

分 类 号：TF111[冶金工程—冶金物理化学]