Study on the Enrichment of Germanium in Matte Smelting of Ge-Containing Copper Concentrate AITranslate

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Chinese Library Classification Number:TF89[冶金工程]

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In response to the problem of low germanium volatilization rate during the matte smelting of Gecontaining copper concentrates,taking high-sulfur low-grade Ge-containing copper concentrate from Yunnan as the research object,the effects of reaction atmosphere,slag composition,and smelting temperature on copper matte grade,Ge volatilization rate,and Ge distribution rules in dust,copper matte,and slag were systematically investigated.The results show that under the optimized conditions of carbon addition of 15%,oxygen concentration of 21%in top-blown gas,Fe/SiO₂mass ratio of 1.1,smelting temperature of 1350℃,and CaO addition of 10%,the copper matte grade obtained by top-blown smelting is 17.21%,and the Ge volatilization rate can reach 94.88%.A strongly reducing atmosphere is conducive to Ge volatilization,but not conducive to desulfurization.Lead and zinc enter the copper matte primarily in the form of sulfides,resulting in a lower copper matte grade.Appropriate Fe/SiO₂mass ratio and CaO addition promote the formation of pyroxene-based slag,reduce slag viscosity,and improve melt fluidity and copper matte settling efficiency,which is beneficial for increasing Ge volatilization rate and copper matte grade.