钙硅比对氧化铜精矿还原熔炼的影响  

Reduction Smelting of Copper Oxide Concentrate with Different Ca/Si Ratio

作　　者：张磊 蒋开喜 谢锋 王伟 路殿坤 ZHANG Lei;JIANG Kaixi;XIE Feng;WANG Wei;LU Diankun(School of Metallurgy,Northeastern University,Shenyang 110819,China;BGRIMM Technology Group,Bei-jing 100044,China;Fuzhou University,Fuzhou 350108,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]矿冶科技集团有限公司,北京100044 [3]福州大学冶金学院,福建福州350108

出　　处：《铜业工程》2023年第2期152-157,共6页Copper Engineering

基　　金：“十三五”国家重点研发计划项目(2019YFC1907304)资助。

摘　　要：以刚果(金)科卢韦齐矿区氧化铜精矿为原料,在1500℃下采用高钙渣型开展1 h焦炭还原熔炼实验。研究表明:从提高铜回收率的角度来看,钙硅化(CaO/SiO_(2))为0.55比较适宜,当CaO/SiO_(2)大于0.5时,铁的竞争性还原反应加剧,造成铜回收率与铜还原率差距加大。综合考虑,CaO/SiO_(2)配料比选择0.50~0.55。炉渣黏度受O/Si变化和AlO_(4)^(5-)补网作用的协同影响。With copper oxide concentrate from Kolwezi mining area in Congo(Kinshasa)as raw material,a 1-hour coke reduction smelting experiment was carried out with high calcium slag at 1500℃.The research shows that the CaO/SiO_(2) ratio of 0.55 is appropriate to improve copper recovery.When the CaO/SiO_(2) ratio is greater than 0.5,the competitive reduction reaction of iron intensifies,resulting in a larger gap between copper recovery and copper reduction.Based on comprehensive consideration,the CaO/SiO_(2) blending ratio is 0.50~0.55.Slag viscosity is affected by the change of O/Si ratio and AlO_(4)^(5)-Synergistic influence of network supplement.

关 键 词：氧化铜精矿 还原熔炼 钙硅比 黏度 电荷补偿 

分 类 号：TF811[冶金工程—有色金属冶金]