摘要
在实验室条件下,考察了不同铁水温度下、炭砖和焦炭同时作为渗碳碳源时,炭砖的侵蚀速率和焦炭的溶解速率及炭砖微观结构的变化。结果表明:在实验范围内,随着铁水温度升高,炭砖侵蚀速率和焦炭溶解速率加快,且焦炭的溶解速率远大于炭砖坩埚的侵蚀速率,说明铁液更易与焦炭发生渗碳反应;侵蚀后的炭砖分层明显,并且有清晰的铁液渗透通道。由此得出,在高炉实际生产中,添加渗碳性能好的焦炭以及定期更新炉缸内死料柱可在一定程度上缓解铁液对炉缸炭砖的侵蚀,从而实现高炉长寿。
As both carbon bricks and coke were served as the carbon source for carburizing at different temperature of hot metal,the erosion rate of carbon bricks,the dissolution rate of coke and the changes in microstructures of carbon bricks were investigated at laboratory.The investigation results demonstrated that within the experimental range,the erosion rate of carbon bricks and the dissolution rate of coke were accelerated as the temperature of hot metal increased and the dissolution rate of coke was much larger than the erosion rate of the crucible made of carbon bricks,which meant that the hot metal was very apt to carburize with coke.It was also found that the corroded carbon bricks were layered obviously and there were clear channels for hot metal to permeate.It was concluded that in the actual production by blast furnace for ironmaking,adding coke with better carburizing property and replacing dead stock at the hearth in the blast furnace regularly could reduce the erosion to the carbon bricks in the hearth to some degree and thus the long campaign of the blast furnace could be achieved.
作者
刘福军
宁晓钧
张建良
焦克新
Liu Fujun;Ning Xiaojun;Zhang Jianliang;Jiao Kexin(Ansteel Iron & Steel Research Institutes,Anshan 114009,Liaoning,China;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《鞍钢技术》
CAS
2019年第1期17-21,共5页
Angang Technology
关键词
高炉
铁水温度
炭砖
焦炭
侵蚀速率
溶解速率
blast furnace
temperature of hot metal
carbon bricks
coke
erosion rate
dissolution rate
