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研究唐钢高炉瓦斯灰的提铁提锌试验。首先,对烘干后的高炉瓦斯灰进行基础特性研究,包括XRF、XRD、粒度分布检测以及化学成分分析。分析可知,瓦斯灰中wTFe=29.3%,主要以Fe2O3的形式存在;wZn=3.13%,主要以ZnO的形式存在。基于铁氧化物、锌氧化物还原的热力学原理,利用本课题组的精细还原技术,设计2因素2水平的正交试验,使用纯H2对瓦斯灰中的铁氧化物和锌氧化物进行精细还原试验。探讨还原温度(910和980℃)和还原时间(2和4h)对瓦斯灰金属化率和脱锌率的影响。试验结果表明,最佳还原工艺参数为910℃,2h;相应的金属化率和脱锌率分别为89.01%和98.61%。
Study on Extraction of Zinc from Iron and Steel in Tangshan BF. First, the basic characteristics of the dried blast furnace gas ash were studied, including XRF, XRD, particle size distribution detection and chemical composition analysis. Analysis shows that wTFe = 29.3% in gas ash, mainly in the form of Fe2O3; wZn = 3.13%, mainly in the form of ZnO. Based on the thermodynamics principle of reduction of iron oxide and zinc oxide, using the fine reduction technology of our group, the orthogonal experiment of 2 factors and 2 levels was designed and the pure H2 was used to refine the iron oxide and zinc oxide in the gas ash test. The effects of reduction temperature (910 and 980 ℃) and reduction time (2 and 4 h) on metallization ratio and dezincification rate were investigated. The experimental results show that the optimum reduction parameters are 910 ℃, 2h; the corresponding metallization and dezincification rates are 89.01% and 98.61% respectively.