300 t转炉石灰石造渣炼钢工艺能耗对比分析

为掌握石灰石造渣和石灰造渣炼钢在工艺能耗方面的不同,在300 t转炉开展石灰石造渣炼钢试验,并从煤气、蒸汽回收及钢渣产生角度进行能耗对比。结果表明,石灰石造渣与石灰造渣炼钢相比,在废钢加入量减少71.6 kg/t的前提下,煤气(CO)回收量提高21.5 m3/t,蒸汽回收量提高28.0 kg/t,钢渣量减少31.4 kg/t。从石灰类熔剂能耗、煤气和蒸汽回收产生的能量及钢渣产生能耗角度对比,两者的能耗平均分别为-38.9、-23.9 kg/t,前者较后者最大节能降耗23.3 kg/t,最小节能降耗9.5 kg/t,平均节能降耗15.0 kg/t。

Contrastive analysis of energy consumption in 300 t converter steelmaking process with limestone as slagging agent

In order to understand the difference of process energy consumption between limestone slagging and lime slagging in steelmaking, experiments with limestone as slagging agent were carried out in 300 t converter, and the energy consumption was compared from the angles of gas, steam recovery and steel slag production. The results showed that comparing the steelmaking process with limestone as slagging agent to that with lime as slagging agent, on the premise of reducing the scrap steel addition by 71.6 kg per ton steel, the recovery of gas (CO) increased by 21.5 m3per ton steel, the recovery of steam increased by 28.0 kg per ton steel, and the steel slag decreased by 31.4 kg per ton steel. From the energy consumption of lime fluxes, the energy generated by gas and steam recovery, and the energy consumption of steel slag, the average energy consumption of the two processes was -38.9 kg per ton steel and -23.9 kg per ton steel, respectively. The former saved energy 23.3 kg per ton steel at most and 9.5 kg per ton steel at least and 15.0 kg per ton steel on average compared with the latter.