含钴铜精矿沸腾焙烧试验研究  

Experimental study on fluidized bed roasting of cobalt-bearing copper concentrate

作　　者：李健 Li Jian(Changchun Gold Research Institute Co.,Ltd.)

机构地区：[1]长春黄金研究院有限公司

出　　处：《黄金》2025年第4期54-58,共5页Gold

基　　金：国家重点研发计划项目(2022YFC2904500)。

摘　　要：采用沸腾焙烧工艺处理国外某含钴铜精矿,考察该矿石沸腾焙烧最佳工艺技术参数。结果显示,最佳沸腾焙烧温度630℃,空气气氛,气料比2.2 m^(3)/kg(工况),物料停留时间6~7 h,焙砂产率为76.70%,粉尘产率为33.11%。连续沸腾焙烧产生的混合砂经硫酸浸出,铜、钴浸出率分别为96.58%、89.57%;烟气中氧气浓度为2.95%,SO_(2)浓度为60900 mg/m^(3),CO浓度为2130 mg/m^(3)。回收粉尘在重力收尘、旋风收尘、布袋收尘的相对产率分别为52.52%、31.62%、15.86%。粉尘中铜、钴金属相对含量分别为19.34%、13.53%。试验结果为该含钴铜精矿的沸腾焙烧工业设计提供了可靠的数据依据。This study investigates the fluidized bed roasting process for treating a cobalt-bearing copper concentrate from overseas,focusing on investigating the key technical parameters of the ore during fluidized bed roasting.Results demonstrate that the optimal fluidized bed roasting conditions include a temperature of 630℃,air atmosphere,gas-to-feed ratio of 2.2 m^(3)/kg(operational),and material retention time of 6-7 h.Under these conditions,the roasting slag yield reaches 76.70%,with a dust generation rate of 33.11%.Subsequent sulfuric acid leaching of the mixed slag after continuous fluidized bed roasting achieves leaching rates of 96.58%for copper and 89.57%for cobalt.Flue gas analysis reveals an oxygen contentration of 2.95%,SO_(2)concentration of 60900 mg/m^(3),and CO concentration of 2130 mg/m^(3).Relative productivity of recovered dust via gravity,cyclone,and bag filter systems are 52.52%,31.62%,and 15.86%,respectively.The relative metal contents of copper and cobalt in the dust account for 19.34%and 13.53%,respectively.These results provide solid data for the industrial-scale fluidized bed roasting design of cobalt-bearing concentrates.

关 键 词：含钴铜精矿 沸腾焙烧 焙烧温度 气料比 焙砂 浸出 

分 类 号：TF81[冶金工程—有色金属冶金]