某金精矿焙烧氧化-氰化浸金试验研究  

Experimental study on the roasting oxidation-cyanidation gold leaching process for a gold concentrate

作　　者：霍明春[1] 陆兆锋[1] 杨晓龙 赵国惠 Huo Mingchun;Lu Zhaofeng;Yang Xiaolong;Zhao Guohui(China National Gold Group Co.,Ltd.;Changchun Gold Research Institute Co.,Ltd.)

机构地区：[1]中国黄金集团有限公司 [2]长春黄金研究院有限公司

出　　处：《黄金》2023年第11期44-47,共4页Gold

摘　　要：对甘肃某复杂难处理金精矿进行焙烧氧化-氰化浸金试验研究。通过条件优化试验,确定最佳氧化焙烧工艺参数。在金精矿磨矿细度-0.074 mm占79.24%,一段焙烧温度为550℃、充气含氧量为10%、焙烧时间为1.0 h,二段焙烧温度为650℃、充气含氧量为21%、焙烧时间为1.0 h的条件下,焙砂中砷、碳和硫的脱除率分别为89.22%、72.05%和95.51%,金浸出率为83.76%。Experimental study was carried out on the roasting oxidation-cyanidation gold leaching process for the treatment of a complex and refractory gold concentrate in Gansu.Through condition optimization test,the optimal parameters for the oxidative roasting are determined.When the gold concentrate has a grinding fineness of-0.074 mm accounting for 79.24%,the first-stage roasting is conducted at a temperature of 550°C,with an oxygen content of 10%in aeration and a roasting time of 1.0 h.The second-stage roasting is conducted at a temperature of 650°C,with an oxygen content of 21%in aeration and a roasting time of 1.0 h.Under these conditions,the arsenic,carbon,and sulfur removal rates in the roasted slag 89.22%,72.05%,and 95.51%,respectively,and the gold leaching rate is 83.76%.

关 键 词：金精矿 焙烧预处理 氰化浸出 含硫 含砷 

分 类 号：TF831[冶金工程—有色金属冶金]