山钢1880 m^(3)高炉用冶金焦性价模型研究及应用

Research and application for cost performance evaluation model of metallurgical coke for Shan Steel 1 880 m^(3) blast furnace

已有生产实践表明,用评价顶装焦的方法评价捣固焦适用性较差。为了准确掌握捣固焦真实热态性能,实现捣固焦和顶装焦在高炉中的安全、经济使用,在研究现有焦炭评价方法及捣固焦结构特性的基础上开发了山钢高炉用冶金焦性价模型。该模型采用数据归纳分析和模糊综合评价的方法,将焦炭的10项常规指标(平均粒径、焦末(粒径小于25 mm)比例、全水分、挥发分、灰分、硫分、冷热态性质(M40、M10、CRI、CSR))和捣固焦的6项结构性指标(高温反应后强度CSR_(1300)、光学组织指数OTI、显微强度MSI、结构强度SSI、假相对密度d、碳化学结构d002)纳入模型,通过构建捣固焦6项结构性指标与冷热态4项性质指标(M40、M10、CRI、CSR)间的相互关系模型,对捣固焦冷热态4项性质指标进行修正,实现了捣固焦、顶装焦评价方法的统一。该模型已在山钢1 880 m^(3)高炉进行应用,模型给出的预测结果对各类型焦炭的科学使用起到了指导作用。

It has been proven that it is not appropriate to evaluate stamp-charging coke in the same way as top-charging coke.In order to accurately grasp the real thermal performance of stamp-charging coke and realize the safe and economic use of stamp-charging coke and top-charging coke in blast furnaces,a metallurgical coke performance model for blast furnaces of Shandong Iron and Steel Group(Shan Steel)was developed based on the existing coke evaluation methods and the structural characteristics of stamp-charging coke.Ten conventional indicators for coke(average particle size,proportion of coke powder(size less than 25 mm),total moisture,volatile matter,ash,sulfur,cold and hot performance(M40,M10,CRI,CSR))and six structural indicators for stamp-charging coke(high temperature reaction strength CSR_(1300),optical tissue index OTI,microscopic strength MSI,structural strength SSI,pseudo relative density d,carbon chemical structure d_(002))were included in this model using data induction analysis and fuzzy integrated evaluation methods.By constructing the interrelationships between the six structural indicators of stamp-charging coke and the four indicators of cold and hot performance(M40,M10,CRI,CSR),the 4 indicators of cold and hot performance for tamping coke were corrected to achieve unified method for the evaluation of stamp-charging coke and top-charging coke.The model has been applied to the 1880 m^(3) blast furnace of Shan Steel and the prediction results given by the model plays guiding role in scientific use for various types of coke.