矿石粒度对氰化浸金浸出率的影响研究  

Study on the Effect of Ore Particle Size on the Leaching Rate of Cyanide Leaching Gold

作　　者：闫刚 YAN Gang(Zhaojin Mining Industry Co.,Ltd.)

机构地区：[1]招金矿业股份有限公司,山东省莱州市265400

出　　处：《现代矿业》2024年第11期182-185,共4页Modern Mining

摘　　要：为了优化氰化浸金工艺参数,针对矿石粒度对金浸出过程的影响,进行了浸出试验和动力学分析研究。研究结果表明:矿石粒度减小,能显著提高金浸出率并加快浸出速率,缩核模型能很好地描述不同粒度下金的浸出过程;矿石粒度减小能显著增大比表面积,降低传质阻力;综合考虑金浸出效率和能耗,确定0.074~0.250 mm粒级为最佳粒度范围,其能耗效率最高,达1.21%/[(kW·h/t)]。该研究为氰化法金浸出工艺参数优化提供了重要依据,对氰化法工艺的可持续发展具有重要意义。In order to optimize the process parameters of cyanide leaching of gold,the leaching test and kinetic analysis are carried out in view of the influence of ore particle size on gold leaching process.The results show that the decrease of ore particle size can significantly improve the gold leaching rate and accelerate the leaching rate.The shrinking core model can well describe the leaching process of gold under different particle sizes.The decrease of ore particle size can significantly increase the specific surface area and reduce the mass transfer resistance.Considering the gold leaching efficiency and energy consumption,the particle size range of 0.074-0.250 mm is determined to be the best particle size range,and its energy consumption efficiency is the highest,reaching 1.21%/[(kW·h/t)].This study provides an important basis for the optimization of gold leaching process parameters by cyanidation,and is of great significance to the sustainable development of cyanidation process.

关 键 词：氰化法 金浸出 矿石粒度 浸出动力学 传质 能耗效率 

分 类 号：TF831[冶金工程—有色金属冶金]