两段焙烧-制酸系统负压运行和尾气治理优化与应用

Optimization and Application of Negative Pressure Operation and Exhaust Gas Treatment of Two-stage Roasting-acid Making System

针对高砷高硫难处理金精矿,采用系统观念进行氧化焙烧预处理和制酸系统技术优化。在保持基本配置下,优化焙烧-制酸、细焙砂输送、酸浸烟气治理三套系统,提升设备密封性,降低漏风率,保障负压效果。同时加强制酸系统中二氧化硫气浓提升后的补氧措施,确保转化效率。改造后,系统负压稳定,设备运行稳定,二氧化硫转化率提高,尾气治理投入降低,二氧化硫排放浓度优化,系统运行更趋稳定,为企业带来显著经济效益。

Aiming at the high-arsenic and high-sulfur refractory gold concentrate,a systematic approach was adopted for oxidation roasting pretreatment and technical optimization of the acid making system.Under the basic configuration,three systems of roasting-acid making,fine calcine transportation,and acid leaching flue gas treatment were optimized to improve equipment sealing,reduce air leakage rate,and ensure negative pressure effect.At the same time,oxygen supplementation measures after increasing the concentration of sulfur dioxide gas in the acid making system were strengthened to ensure conversion efficiency.After the transformation,the system's negative pressure was stable,the equipment operated stably,the sulfur dioxide conversion rate increased,the investment in exhaust gas treatment decreased,the sulfur dioxide emission concentration was optimized,and the system operation became more stable,bringing significant economic benefits to the enterprise.