高炉高煤比冶炼条件下炉料质量下降的应对措施探讨  

Discussion on Measures to Deal with the Decline of Charge Quality in High Coal Ratio Smelting Conditions of Blast Furnace

作　　者：李海斌 高志军 李健忠 吕国明 LI Haibin;GAO Zhijun;LI Jianzhong;LV Guoming(Shanxi Jianlong Industrial Co.,Ltd.,Yuncheng 043801,China)

机构地区：[1]山西建龙实业有限公司,山西运城043801

出　　处：《金属材料与冶金工程》2024年第3期49-53,58,共6页Metal Materials and Metallurgy Engineering

摘　　要：山西建龙5^(#)高炉2023年2月通过对标行业先进水平,煤比存在差距,进而对煤比进行攻关。到7月上旬煤比达186.54 kg/t,较2月份提高25.20 kg/t,燃料成本降低46.88元/t,效果明显。因公司7月资金紧张,炉料库存降到最低且供货不及时、质量下降,致使配料结构调整频繁,炉况出现较大波动,煤比最低降到161.65 kg/t,高炉采取应对措施,炉况逐渐恢复正常。生产实践表明:物料质量优化、稳定是高煤比生产红线;保持物料合理库存、稳定炉料结构,对稳定炉况至关重要;高煤比生产对物料质量和高炉操作需求更高,物料质量波动下降,焦炭负荷及时合理调整,改善料柱透气性,稳定风速≥245 m/s,铁水物理≥1490℃是炉况稳定的基础。In February 2023,Shanxi Jianlong 5^(#)blast furnace benchmarked the industry's advanced level and found that there was a gap in coal ratio.Therefore,efforts were made to tackle the coal ratio issue.By early July,the coal ratio had reached 186.54 kg/t,an increase of 25.20 kg/t compared to February,and the fuel cost had decreased by 46.88 yuan/t,indicating a significant improvement effect.In July,due to financial constraints,the company's inventory of furnace materials decreased to the lowest level,and the supply was not timely and the quality declined,resulting in frequent adjustments to the ingredient structure and significant fluctuations in furnace conditions.The coal ratio dropped to a minimum of 161.65 kg/t.After taking corresponding measures,the blast furnace condition gradually returned to normal.Production practice has shown that optimizing and stabilizing material quality is the red line for high coal ratio production;maintaining a reasonable inventory of materials and stabilizing the structure of furnace materials is crucial for stabilizing furnace conditions;High coal ratio production requires higher material quality and blast furnace operation.The fluctuation of material quality decreases,the coke load is adjusted in a timely and reasonable manner,the permeability of the material column is improved,the wind speed is stable at≥245 m/s,and the temperature of molten iron is controlled at≥1490℃,which is the basis for stable furnace conditions.

关 键 词：煤比 炉况 波动 分析 稳定 

分 类 号：TF538[冶金工程—钢铁冶金]