某高品位铜精矿一步炼铜试验研究  

Experimental study on direct-to-blister copper smelting of a high-grade copper concentrate

作　　者：陈杭[1,2] Chen Hang(Zijin Mining Group Co.,Ltd.;Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology)

机构地区：[1]紫金矿业集团股份有限公司,361008 [2]昆明理工大学冶金与能源工程学院

出　　处：《黄金》2022年第12期63-68,共6页Gold

摘　　要：一步炼铜技术具有流程短、绿色节能等优势,符合当前碳中和的发展方向。以某高品位铜精矿为原料,采用一步炼铜技术进行处理,考察了吹炼时间、保温时间、钙硅比等因素对铜直收率的影响,初步探讨了其作用机制。结果表明:最佳渣相成分为Fe/SiO_(2)=0.30,CaO/SiO_(2)=0.58;在冶炼温度1300℃时,以吹炼风流速0.4 L/min向60 g熔体中喷吹34 min 70%的富氧空气,随后静置沉降120 min获得粗铜,铜直收率为91.65%;随着CaO添加量的升高,会生成高熔点的钙铝硅酸盐,使渣含铜升高;渣黏度为1.8 Pa·s,渣中铜主要以金属铜和白冰铜的形式夹带损失。Direct-to-blister copper smelting technology has the advantages of short process and energy saving,which is in line with the current development direction of carbon neutralization.In this work,a high-grade copper concentrate was used as the raw material to explore the effects of blowing time,heat preservation time,and calcium-silica ratio on the direct copper recovery rate of direct-to-blister copper smelting technology,and its mechanism was preliminarily discussed.The results show that the optimum slag phase composition is Fe/SiO_(2)=0.30 and CaO/SiO_(2)=0.58.At smelting temperature 1300℃,70%oxygen-rich air was injected into 60 g melt at a flow rate of 0.4 L/min for 34 min and then settled for 120 min to obtain blister copper.The direct copper recovery rate was 91.65%.With the increase of CaO addition,calcium aluminosilicate with a high melting point will be formed,which will increase the copper content in slag.The viscosity of the slag is 1.8 Pa·s,and the copper in the slag is mainly entrained in the form of metallic copper and white ice copper.

关 键 词：一步炼铜 铜精矿 铜直收率 铜渣 渣型 钙硅比 

分 类 号：TF811[冶金工程—有色金属冶金]