摘要
铜精矿焙烧时的温度分布情况决定着氧化反应的彻底程度和烟气质量。沸腾炉反应塔区域温度差异相当显著,其上部温度大约在900~1100℃,下部温度可高达1350~1550℃。基于某冶炼厂焙烧系统的温度实测数据,构建出温度分布的数学模型并探讨给料速率、富氧含量及风量等因素对温度场的作用规律。研究发现,当焙烧温度处于600~800℃区间时,铜浸出率能够超过90%;转化器一段出口温度控制在660℃、二段为620℃时,SO_(2)转化率可达96%;通过改善温度均匀性,制酸单位能耗从110 kWh/t降至56 kWh/t,且硫利用率提高至98%。由此可见温度场优化能显著改善焙烧品质并提高制酸效率。
The temperature distribution during copper concentrate roasting determines the completeness of oxidation reactions and flue gas quality.Significant temperature variations exist within the reaction tower section of the fluidized bed furnace,with upper temperatures ranging from 900℃to 1100℃and lower temperatures reaching 1350℃to 1550℃.Based on actual temperature measurements from a smelter's roasting system,a mathematical model of the temperature distribution was developed to investigate the influence of factors such as feed rate,oxygen enrichment level,and air volume on the temperature field.The study revealed that copper leaching rates exceed 90%when roasting temperatures are maintained between 600~800℃.SO_(2)conversion rates reach 96%when the converter's first-stage outlet temperature is controlled at 660℃and the second stage at 620℃.By improving temperature uniformity,acid production energy consumption decreased from 110 kWh/t to 56 kWh/t,while sulfur utilization efficiency increased to 98%.Thus,temperature field optimization significantly improves calcination quality and enhances acid production efficiency.
作者
韦亮
刘海
杨科
杨剑峰
Wei Liang;Liu Hai;Yang Ke;Yang Jianfeng(Beijing Huagang Mining Co.,Ltd.,Beijing 100039,China)
出处
《当代化工研究》
2025年第24期59-61,共3页
Modern Chemical Research
关键词
铜精矿
沸腾焙烧
温度场分布
数学建模
制酸效率
copper concentrate
boiling roasting
temperature field distribution
mathematical modeling
acid production efficiency
