Thinking and practice on promoting special line and laminar flow operation mode
ZENG Jiaqing1, ZHANG Junguo2, LIN Lu1, DUAN Yunxiang2, HE Qing1, CUI Huaizhou1, DAI Yuxiang1
1. Metallurgical Technology Institute, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China; 2. Tangsteel Company, HBIS Group, Tangshan 063000, Hebei, China
Abstract：The irregular "timing dislocation" of the links between the front and back procedure in the steelmaking section causes invalid waiting between different procedures or frequent passive changes in the procedure link mode. If these random events cannot be controlled or still rely on human experience,it is bound to cause problems such as low process operation efficiency,large dissipation,poor process stability,product quality fluctuation and difficulty in realizing intelligent control. In this regard,the systematic analysis and practice of the coordinated operation of the laminar flow line in the steelmaking section of the blast furnace-converter process are carried out to provide strong support for the coordinated operation of the laminar flow line in the steelmaking section. The results show that the process path optimization from the physical side of the steel process is an important support for the intelligent control of the steel process,and it is also the premise and the only way to improve the process intelligence. The special line production organization mode is a minimalist optimization of the process path that seems to be "reliable insurance" in the past,but is actually complex,changeable and inefficient. By means of special production organization and standardizing the transport mode of iron material flow,the operation time of each procedure and the transfer time between procedures are narrowed,so that the steelmaking section has the operation conditions of "quasi-equal rhythm" in each procedure and "synchronous walking" between different procedures,which meets the timing requirements of multi-furnace continuous casting in continuous casting procedure. This is an important mechanism of laminar special line operation in steelmaking section. After the preliminary practice of using two dedicated laminar flow process paths in a plant,the proportion of links in each procedure in line with the specialization increased from 41.23% in December 2021 to 66.27% in June 2022. The inter-procedure transmission time and the total operation time of the steelmaking section were shortened from 87.9 min and 253.9 min in December 2021 to 78.2 min and 210.7 min,respectively,which was roughly equivalent to increasing the output of one furnace steel,and the production efficiency was significantly improved.
曾加庆, 张军国, 林路, 段云祥, 贺庆, 崔怀周, 戴雨翔. 炼钢区段推进层流专线化运行模式的思考与实践[J]. 钢铁, 2023, 58(11): 61-68.
ZENG Jiaqing, ZHANG Junguo, LIN Lu, DUAN Yunxiang, HE Qing, CUI Huaizhou, DAI Yuxiang. Thinking and practice on promoting special line and laminar flow operation mode[J]. Iron and Steel, 2023, 58(11): 61-68.
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2023, Vol. 58 
