高炉混合配煤及富氧率优化

针对湖南燃煤资源特性和某高炉喷煤生产现状,选取了10种代表性原煤为试验样本。基于LINGO优化软件,以混煤价格最低为目标函数,以高炉喷煤煤质要求为约束条件,求解得到了5种喷吹用混煤样本,在混煤特性试验的基础上,通过性价比分析选取了合适的喷吹煤种,并计算出与混煤匹配的富氧率。工业喷吹试验结果表明,采用优化后所获得的煤样及富氧率获得了良好效果,煤比提高51kg/t,焦比下降38kg/t,铁水含S量降低,渣流动性得到改善,吨铁增益37.77元,降低了生产成本。

Optimization of coal blending and oxygen enrichment percentage in blast furnace

Aiming at the resource characteristics of coal and the poor injection rate of a blast fumace in Hunan province, ten kinds of representative coals were picked as experimental samples. By utilizing LINGO, five corresponding mixed coal samples were prepared with the cheapest price as the objective function and the quality requirements of blast furnace coal as constraint condition. Based on the result of property test, the appropriate coal sample was chosen via the analysis of price ratio and appropriate oxygen enrichment percentage matched with coal blending was calculated. The test results showed that it is of great benefit to optimize the coal sample and the rate of oxygen enrichment. The coal injection rate increased 51 kilograms and the coke rate decreased 38 kilograms per ton iron. The content of sulfur in molten iron was also reduced. The flow ability of furnace cinder was improved. The economic benefits per ton iron increase 37. 77 yuan and the production cost was lower.