复杂金矿物氧化焙烧-硫酸浸出-氰化法回收金银模拟计算

基于质量守恒、化学平衡、元素分配约束、热量守恒和指标约束等原理,构建了复杂金矿物苛性钠氧化焙烧、硫酸浸出、氰化法等工序的物料平衡和热平衡多约束控制模型,开发了复杂金矿物焙烧-酸浸-氰化工艺全流程模拟系统,计算了全流程典型工况的物质分配和能量守恒,并采用生产数据对模型进行验证。结果表明,以实际值为基准,焙烧工序中焙砂的Cu、S、Fe和SiO2含量的相对误差的百分数分别为-14.95%、-0.37%、1.77%和-6.54%;而Pb、Zn、As含量的相对误差的百分数分别为6.15%、4.94%和4.84%。酸浸分铜渣中Cu、S、Fe和SiO2含量相对误差的百分数分别为-12.90%、3.48%、5.23%和4.74%;而Pb、Zn、As含量相对误差的百分数分别为-10.75%、0和-1.27%。氰化渣中Cu、S、Zn、Fe和As含量相对误差的百分数分别为-3.57%、3.48%、5.88%、3.71%和-1.27%。

Simulation Calculation on Recovery of Au, Ag and Cu from Complex Gold Concentrate by Oxidation Roasting - Sulfuric Acid Leaching - Cyanidation Process

Based on principles of mass conservation, chemical equilibrium, element allocation constraints, heat conservation and index constraints, a multi-constraint control model of material balance and thermal balance for process of caustic soda oxidation roasting, sulfuric acid leaching, and cyanidation to treat complex gold mineral was constructed. Whole process simulation system was exploited for complex gold mineral roasting-acid leaching-cyanidation process. Material distribution and energy conservation in typical working conditions of the whole process was calculated and validated with production data. The results show that relative errors of Cu, S, Fe, and SiO2 contents compared with real values are -14.95%, -0.37%, 1.77% and -6.54%, respectively, and relative errors of Pb, Zn, and As contents are 6.15%, 4.94%, and 4.84%, respectively. Relative errors of Cu, S, Fe and SiO2 contents in acid leaching copper slag are -12.90%, 3.48%, 5.23% and 4.74%, respectively, and relative errors of Pb, Zn, and As contents are -10.75%, 0 and -1.27%, respectively. Relative errors of Cu, S, Zn, Fe, and As contents in cyanide slag are -3.57%, 3.48%, 5.88%, 3.71%, and -1.27% respectively.