(1. 云南錫業(yè)郴州礦冶有限公司高新材料分公司，郴州 423000；
2. 云南錫業(yè)股份有限公司，個舊 661000)
摘 要: 提出一種硫化焙燒處理錫陽極泥分離銻的新工藝，對硫化焙燒過程進行熱力學分析，在熱力學分析的基礎(chǔ)上，系統(tǒng)考察焙燒溫度、焙燒時間、黃鐵礦配比及焦粉配比對銻揮發(fā)率和錫殘留率的影響。結(jié)果表明：溫度升高有利于Sb2O4和SnO2硫化反應的進行，且在同一溫度下，Sb2O4比SnO2硫化的趨勢更強。在黃鐵礦配比為30%(質(zhì)量分數(shù))、焦粉配比為7%(質(zhì)量分數(shù))、焙燒溫度為1323 K、焙燒時間為2 h的條件下，焙砂中的銻含量為2.96%、錫含量為31.98%、銻的揮發(fā)率為85.56%、錫的殘留率為88.75%，錫陽極泥硫化焙燒分離銻效果較佳。
關(guān)鍵字: 錫陽極泥；銻；硫化焙燒；飽和蒸汽壓
（1. Hi-tech and New Materials Branch of Yunnan Tin Chenzhou Mining and Metallurgy Co. Ltd., Chenzhou 423000, China;
2. Yunnan Tin Co. Ltd., Gejiu 661000, China）
Abstract:A new technology of sulfidation roasting process for tin anode slime to separate antimony was proposed. Thermodynamic analysis of sulfidation roasting process was conducted. Based on the thermodynamic analysis, the influences of calcination temperature, calcination time, pyrite ratio and coke ratio on the volatilization rate of antimony and the residual rate of tin were investigated. The results show that high temperature benefits for Sb2O4 and SnO2 sulfidation reaction，while Sb2O4 sulfidation trend is stronger than that of SnO2 at the same temperature. While the pyrite content is 30% (mass fraction), coke content is 7% (mass fraction), the calcination temperature is 1323 K, the roasting time is 2 h, the antimony content in calcine is 2.96%, tin content is 31.98%, the volatilization rate of antimony is 85.56%, the residual rate of tin is 88.75%, the effect of separating antimony from tin anode slime by sulfidation roasting is better.
Key words: tin anode slime; antimony; sulfidation roasting; saturated vapor pressure
