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Guidance and evaluation system for smooth operation of heavy-haul trains

Transportation Safety and Environment 2020年第3期2卷 226-235页

作者： Zhi Zhang Xiang Wei Tao Zhang Songxu Wang Research Institute of Science and Technology of Daqin Railway Co. Ltd.Taiyuan030013China China Railway Taiyuan Bureau Group Co. Ltd.Taiyuan030013China National Railway Administration of People’s Republic of China Beijing100070China

The operation rules and methods for heavy-haul trains were studied and summarized according to the characteristics of the Daqin Railway,such as a large traffic volume,a high density and high-speed and difficult-to-operate heavy-haul trains.Combined with traction calculation and operation experience,these can be quantificationally decomposed into an evaluation standard for the smooth modularized operation of heavy-haul trains that can be recognized by computers.A train operation guidance system was designed to collect locomotive drivers’operation data,display the actual operation and standard curves in real time and give voice prompts and violation-operation alarms for safety-critical operation.In addition,software for operation analysis and evaluation was developed according to the quantified smooth operation standard.The smooth operation of heavy-haul trains was evaluated and statistically analysed through a comparative analysis of the actual operation records.Moreover,a train impact force detection device capable of monitoring the three-dimensional impact force of heavy-haul trains in real time was developed.Meanwhile,the evaluation standard for smooth operation was verified and optimized by real-time monitoring of the impact force of heavy-haul trains.Finally,on the basis of the above studies,a complete closed-loop management scheme for the smooth operation of heavy-haul trains was constructed,and the objectives of optimizing train operation strategy,standardizing drivers’operations and ensuring the smooth operation of trains were realized through application.

关键词： heavy-haul trains smooth operation traction calculation synchronous operation simplified line model

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Study　on　the　Shaft-Direct　Reduction　Process　with　Cold　Bound　Pellet

引用

Journal of Iron and Steel Research(International) 1997年第1期4卷 10-14页

作者： Qi Yuanhong Zhou Yusheng Xu Haichuan Yu Jingfeng Cai Aiping Central Iron and Steel Research Institute MMI

The metallurgical properties of cold bound pellet were tested and analysed, and the behaviour and characters of reduction in the shaft were further investigated on the basis of analysis. The experimental results indicated that the metallurgical properties of cold bound pellet could satisfy the demands of the shaft direct reduction. The reduction of ferrous oxide with gas was taken as the domination. The reduction ratio of ferrous oxide with fixed carbon increased with the raising of temperature, and most part of the carbon remained in metallized pellet. The shaft could be smoothly operated to obtain rather higher constant utilization.

关键词： cold bound pellet metallurgical property shaft direct reduction smooth operation

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