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本文研究了难处理矿石氰化过程的贵液侵吞的动力学机理,利用人工添加Au(CN)2-的方法,对其吸附的动力学进行分析,并与易处理矿石进行比较。同时还研究了焙烧和压力氧化对贵液侵吞动力学过程的影响。研究结果表明,由于试验矿石对金的吸附速度很快,是造成所试验矿石难浸的主要原因之一。通过对矿石焙烧和压力氧化处理,可导致表面吸附活性的下降。通过对金的吸附动力学过程的分析发现,第一阶段吸附速度较快且速度变化较大,具有典型的化学吸附的特征;而第二阶段吸附速度较慢,其吸附速度与吸附量之间可表为一线性关系,证明吸附过程中没有活化能的变化或吸附中心数量的变化,因而具有多层物理吸附特征。
In this paper, the kinetic mechanism of entrapment of leachate in the cyanidation process of refractory ore was studied. The kinetics of its adsorption was analyzed by artificial addition of Au (CN) 2- and compared with that of easily-treated ore. The effects of calcination and pressure oxidation on the entrapment kinetics of liquid were also studied. The results show that due to the rapid adsorption of gold on the test ore, it is one of the main reasons for the difficult ore leaching. By ore calcination and pressure oxidation treatment, can lead to a decrease in surface adsorption activity. Through the analysis of the adsorption kinetics of gold, it was found that the adsorption rate in the first phase was faster and the velocity was larger, which showed typical characteristics of chemisorption. However, the adsorption rate in the second phase was slower than that in the adsorption phase Can be expressed as a linear relationship to prove that there is no change in activation energy or adsorption center changes in the adsorption process, which has multi-layer physical adsorption characteristics.