包钢干熄焦除尘灰用于高炉喷吹的研究

Study on the Use of Baotou Steel CDQ Ash in Blast Furnace Injection

为研究包钢干熄焦除尘灰代替部分高炉喷吹用煤,对干熄焦除尘灰进行了工业分析和微观形貌分析,采用热重分析仪对干熄焦除尘灰和高炉喷吹用煤的着火点、燃尽温度、燃尽时间、综合燃烧特性指数以及动力学参数进行了分析,探讨了干熄焦除尘灰配入量对高炉喷吹性能的影响。研究结果表明:活化能随干熄焦除尘灰配入量的增加而增大,燃烧性能降低,干馏烟煤、无烟煤、半焦和干熄焦除尘灰(配比为40%30%25%5%)搭配组成的混合煤燃烧性能最好。

In this paper, in order to study on the use of Baotou Steel CDQ ash in blast furnace injection coal, the industrial analysis and SEM analysis are conducted, in which thermo - gravimetric analyzer is applied to conduct analyses on the ignition point, burnout temperature, burning time, index of combustion characteristics, as well as kinetic parameters and the effects of the quality of CDQ ash on blast furnace spraying properties are also discussed. The resuits show that the activation energy increases with the increase of CDQ ash, the combustion performance reduces and the combustion performance of the mixed coal with the dry distillation of bituminous coal, anthracite, coke and CDQ dust （ ratio of 40% ： 30% ：25% ： 5% ） is the best.