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为了查明高炉下部焦炭性能变化和铁水与熔渣的状况,以便制定高炉用焦性能标准和确立控制铁水组分的技术,在福山厂2号高炉(内容积2828米~3,炉缸直径11.5米)上安装了一种能在高炉休风(进行常规调查和检修)期间从风口水平采取炉内熔融物质试样的取样器。得出的结果: (1)循环区的焦炭温度不仅受到按拉姆方程式计算出来的理论燃烧温度的影响,而且受到炉料分布与煤气流的影响; (2)在循环区附近,焦炭的反应率(CRI)愈高,焦炭粒度变小的现象就愈显著,而且在高炉下部的平均破裂率将相应增加; (3)滴下带中生铁含硅量取决于温度,并受焦炭反应半的影响; (4)滴下带中的铁水和溶渣的静态容量(hs)的推定公式为:hs=0.20·Gam~(-0.102)·Cpm~(-0.387)式中:Gam——修正伽利略数;Cpm——修正毛细管数。
In order to identify the changes in the lower part of the blast furnace coke performance and the status of molten iron and slag in order to develop the performance standards for blast furnace coke and establish the control of hot metal components in the Fukuyama Plant No. 2 blast furnace (volume 2828 ~ 3, hearth diameter 11.5 M) installed a sampler capable of taking a sample of the molten material from the tuyere level during blast off (for routine investigation and overhaul). The results are as follows: (1) The coke temperature in the recirculation zone is affected not only by the theoretical combustion temperature calculated by the Ram equation, but also by the charge distribution and the gas flow. (2) In the vicinity of the recirculation zone, the coke reaction rate (CRI), the coke particle size becomes smaller, and the average fracture rate in the lower part of the blast furnace will increase accordingly. (3) The amount of silicon in the pig iron in the dropping zone depends on the temperature and is affected by the half of the coke reaction. (4) The estimated formula for the static capacity (hs) of molten iron and slag in the dropping zone is: hs = 0.20 · Gam ~ (-0.102) · Cpm ~ (-0.387) where: Gam - - Correct the capillary number.