转炉低铁耗热补偿工艺工业性试验研究

Industrial Test Study on Coke Thermal Compensation Process with Low Iron Consumption

提高废钢比、降低铁水比是目前转炉炼钢的主要趋势。为解决某钢厂转炉低铁耗冶炼带来的炉内热量不足的问题,介绍了在转炉后吹的前提下采取向炉内添加焦炭发热材料进行热补偿的工艺。通过工业性试验,探索出一种新的焦炭添加工艺:在炉内纯供氧3~5 min期间加入3~4 kg/t焦炭,在溅渣结束前1 min内加入0~1 kg/t的焦炭。结果表明:在该工艺下,转炉炉内添加约4 kg/t的焦炭可实现热补偿钢水温度12.4℃,降低铁耗4.7 kg/t,钢水中的硫含量增加约0.002%。

In order to solve the problem of insufficient heat in the converter caused by low iron consumption smelting in a steel plant,t the process of adding coke heating material to the furnace for heat compensation on the premise of converter back blowing is introduced.Through industrial tests,a new coke addition process is explored:add 3~4 kg/t coke during 3~5 minutes of pure oxygen supply to the furnace,and add 0~1 kg/t coke with in 1 minute before the end of slag splashing.The results show that under this process,adding 4 kg/t coke into the converter can realize thermal compensation,the temperature of molten steel is 12.4 C,and the iron consumption is reduced by 4.7 kg/t,and the sulfur content in molten steel is increased by about 0.002%.