Industrial practice for high efficiency smelting of 200 t converter in Tanggang New Area
LI Mo-zhuo1, ZHANG Jun-guo1, DAI Yu-xiang2, CUI Huai-zhou2, HE Qing2, LIN Lu2
1. Tangshan Iron and Steel Group Co., Ltd., Tangshan 063000, Hebei, China; 2. Metallurgical Technology Research Institute, General Iron and Steel Research Institute, Beijing 100081, China
Abstract:Some problems such as too long and nonuniformity operation period exist in the converter process of Tanggang New Area, which restricts the improvement of efficient smelting production and standardized operation level in the steelmaking process. In order to improve the production efficiency of the 200 t converter in Tangsteel, through the analysis of each event-time in the converter process, the weak links were identified, and a series of work was carried out in the optimization of converter process and the improvement of software and hardware facilities. The results show that the oxygen supply intensity of 6-hole oxygen gun nozzle can reach 3.9 m3/(t·min). Combined with the optimization of oxygen supply system, the oxygen blowing time can be reduced from 13.5 min to less than 10.8 min. By transforming the former 160 mm outlet into 170 mm outlet, the average tapping time is shortened by more than 40 s. Through adopting the automatic tapping technology of converter, the average slag index of converter is reduced from 35.6 to 22.9, which is 36% lower, the amount of slag is reduced significantly, and the tapping time is saved by about 5%-10%. Through the above series of methods, the period of converter is shortened from 37.7 min (June 2021) to less than 30 min (March-April 2022), and the shortest period for a single shift is 26.8 min, which provides strong guarantee for the efficient production of the steelmaking production.
李末卓, 张军国, 戴雨翔, 崔怀周, 贺庆, 林路. 唐钢新区200 t转炉高效冶炼生产实践[J]. 中国冶金, 2023, 33(3): 117-123.
LI Mo-zhuo, ZHANG Jun-guo, DAI Yu-xiang, CUI Huai-zhou, HE Qing, LIN Lu. Industrial practice for high efficiency smelting of 200 t converter in Tanggang New Area[J]. China Metallurgy, 2023, 33(3): 117-123.