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投稿时间:2021-08-19 修订日期:2021-09-27
投稿时间:2021-08-19 修订日期:2021-09-27
中文摘要: 脱铜阳极泥熔炼高铅渣在熔点测定过程中由于挥发会导致测定结果偏离“真值”(本文称为“测不准”)。本文以卡尔多炉工艺熔炼脱铜阳极泥的高铅渣为研究对象,尝试通过研究挥发机制预测升温过程的适时炉渣组成,进一步以适时炉渣组成与熔点测定值对应,以消除挥发的影响。采用FactSage7.1软件计算熔炼渣的熔点和挥发反应的热力学,用半球法测定熔化温度,利用TG热重分析仪测定渣样的失重变化规律。结果表明:高温下含铅渣挥发主要是PbO以及少量的Bi2O3、As4O6、TeO2、SeO2和Sb4O6挥发所导致的,在950~1200℃高温段挥发最明显,当PbO含量分别为14.52%、25.07%、28.75%和41.25%的铅渣挥发率分别为35.25%、49.48%、55.92%和58.39%。Factsage计算熔点值比半球点及流动温度实测偏高。对脱铜阳极泥熔炼高铅渣所测半球点温度和流动温度与适时炉渣成分(基于原始炉渣成分及挥发失重的测算)对应,得到更接近“真值”的新成分-熔点的对应关系。
Abstract:In the process of melting point measurement of high-lead slag in copper removal anode slime smelting, the results will deviate from the "true value" due to evaporation (referred to as "uncertainty"). In this article, high-lead slag produced by the Kaldor furnace process for copper removal anode slime smelting was taken as object, a method was suggested to predict the timely slag composition during the heating process based on evaporation mechanism, and to use the timely slag composition to correspond to the measured melting point to eliminate the effect of evaporation. The FactSage 7.1 software was used to calculate the melting point of the smelting slag and the ΔG of the evaporation reaction, the melting points were measured by the hemisphere method, and the weight loss of the slag samples were measured by TG. The results show that the weight loss of lead-containing slag at high temperature is mainly caused by the evaporation of PbO and a small amount of Bi2O3, As4O6, TeO2, SeO2 and Sb4O6. The evaporation is obvious at the high temperature of 950~1200℃, when the PbO content is 14.52%, 25.07%, 28. 75% and 41.25% respectively, the slag evaporation rates can reached 35.25%, 49.48%, 55.92% and 58.39% respectively. The melting point calculated by FactSage is higher than the measured hemispherical point and flow temperature. The measured hemispheric point temperature and flow temperature of the high-lead slag smelted from copper removal anode slime correspond to the timely slag composition (based on the calculation of the original slag composition and evaporation weight loss), and a new composition-melting point relationship closer to the "true value" is obtained.
keywords: copper removal anode slime high-lead smelting slag melting point evaporation measurement uncertainty
文章编号: 中图分类号:TF812 文献标志码:
基金项目:国家自然科学基金资助项目(编号:51674185,51674186)
引用文本:
胡爱琳,赵俊学,辛 鑫,王 泽,康 毅,张笑天,崔雅茹,李 彬.脱铜阳极泥熔炼高铅渣熔点“测不准”问题分析[J].有色金属工程,2022,(5):.
胡爱琳,赵俊学,辛 鑫,王 泽,康 毅,张笑天,崔雅茹,李 彬.脱铜阳极泥熔炼高铅渣熔点“测不准”问题分析[J].有色金属工程,2022,(5):.