高炉喷吹焦炉煤气风口回旋区的数学模拟

基于质量平衡和热量平衡理论,建立了高炉喷吹焦炉煤气风口回旋区数学模型,系统研究了焦炉煤气喷吹量对回旋区焦炭质量流量、理论燃烧温度、炉腹煤气量、炉腹煤气组成和回旋区形状的影响.研究表明:在维持高炉现有的基准操作不变的条件下,随着焦炉煤气喷吹量的增加,理论燃烧温度呈降低的趋势,而炉腹煤气量呈增加的趋势;为了维持理论燃烧温度和炉腹煤气量与基准操作一致,可通过降低风量和提高富氧率进行热补偿.热补偿后,随着焦炉煤气喷吹量的增加,焦炭质量流量呈上升趋势,炉腹煤气中还原气体积呈增加趋势,回旋区体积呈缩小趋势.每增加1 m3/s的焦炉煤气喷吹量,焦炭质量流量上升1.74%,炉腹煤气中还原气体积增加2.04%,...

Numerical Simulation of Blast Furnace Raceway with Coke Oven Gas Injection

A raceway mathematical model of blast furnace with coke oven gas(COG) injection was established based on the theory of mass and heat balances.The effects of COG injection volume on the coke mass flow rate,theoretical flame temperature,bosh gas volume,bosh gas compositions and raceway shape were investigated systemically.The results showed that the theoretical flame temperature tends to decreasing and bosh gas volume tends to increasing,when COG injection volume increasing with the benchmark operation of blast furnace unchanged.The theoretical flame temperature and bosh gas volume can be constant by decreasing blast volume and increasing oxygen enrichment when blast furnace operating with coke oven gas injection.After thermal compensation,with increasing COG injection volume,the coke mass flow rate and reducing gas volume in bosh gas tend to increasing,and the raceway cubic capacity tends to narrowing.With 1 m3/s increasing of COG injection,the coke mass flow rate increases by 1.74%,the reducing gas volume in bosh gas increases by 2.04% and the raceway cubic capacity decreases by 1.98%.