Research and application of oxygen-enriched ignition in Zenith Iron and Steel Co., Ltd.
ZHANG Jun-jie1, PEI Yuan-dong1, LONG Hong-ming2, LIU Tong1, LIU Qian3, SHENG Jian-hua1
1. Zenith Steel Group Co., Ltd., Changzhou 213011, Jiangsu, China; 2. School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243032, Anhui, China; 3. National Engineering Research Center of Sintering and Pelletizing Equipment System, Zhongye Changtian International Engingeering Co., Ltd., Changsha 410205, Hunan, China
Abstract：For most iron and steel enterprises without coking plant, the ignition gas used in sintering machine is mostly blast furnace gas, converter gas or the mixture of the two. The quality of surface sinter with these low calorific value gas is worse than that with coke oven gas. In view of this, the project team developed oxygen enriched ignition process, which was successfully implemented in 180 m2 sintering machine of ZENITH. After the implementation of oxygen enriched ignition, the furnace temperature was increased while the gas consumption was reduced. Under the condition of oxygen enriched 300 m3/h, the furnace temperature was increased by 15-36 ℃, and the gas flow was reduced by 250-600 m3/h. At the same time, the solid fuel combustion effect of surface sintering was improved, the solid fuel consumption was reduced by 1.25 kg/t, the strength of surface sintering was increased by 2.27%, and the internal return ratio was reduced by 1%.
张俊杰, 裴元东, 龙红明, 刘桐, 刘前, 盛建华. 中天钢铁烧结富氧点火研究与应用[J]. 中国冶金, 2021, 31(8): 54-59.
ZHANG Jun-jie, PEI Yuan-dong, LONG Hong-ming, LIU Tong, LIU Qian, SHENG Jian-hua. Research and application of oxygen-enriched ignition in Zenith Iron and Steel Co., Ltd.[J]. China Metallurgy, 2021, 31(8): 54-59.
2021, Vol. 31 
