| The techno-interface of BF-BOF region is the key region to optimize the iron-making and steel-making process as a whole. It is also an important stage that connects iron-making process and steel-making process in the production line, acting as a connecting link between the preceding and the following procedure. It also optimize the important indicators of BF-BOF interface mode, based on which material flow, energy flows, temperature, time and other basic parameters can coordinate, converge well and keep a good stability feature in steel production. In this way, it can achieve coordination, continuity, high efficiency.The capacity matching between iron and steel, buffering ability, equipment volume, and the correspondence relationship of time in BF-BOF region have been analyzed based on the principle of detailed material-flow balance. By application of the dynamic balance of the homeostasis of "pushing force", "buffering force" and "pulling force", the corresponding capacities of BF and BOF are calculated, and the harmony of the time schedule and buffering force changing rules have been analyzed. According to the types of hot metal transport equipment and methods of hot metal pretreatment, Analyzing of operating schedule and temperature drop of hot metal in different techno-interface mode, the merit and demerit of different techno-interface modes on operating schedule, temperature drop of hot metal have been analyzed. As a result, mode of BF tapping ladle-hot metal charging ladle and mode of TPC-hot metal charging ladle have more process and the number of ladles in this course. The mode of BF tapping ladle-hot metal mixer-hot metal charging ladle will be built when the capacity non-correspondence of BF and BOF. And the longer transportation time of hot metal, the slower cycle time result in the temperature of hot metal was slower. But the mode of one open ladle from BF to BOF has more advantageous such as:canceling the process of ladle to ladle in the steelmaking plant, reducing the ladling working time in steelmaking, shorten process flow, compacting general layout. Especially, to improve operating schedule of techno-interface mode in BF-BOF region it must be based on the capacity correspondence of BF and BOF. and it will evolve to the mode that the hot metal charging ladle carries on all the tasks of the techno-interface.Based on queuing theory, WITNESS, mathematical analysis and system simulation, how to optimize complex repairable closed network which consists of "the model of one open ladle from BF to BOF" was researched. And the network is divided into three subsystems-pre-queuing system-hot metal charging BOF subsystem, transport subsystem and BF subsystem so as to get the main performance indicators of the whole queuing system. Based on this, the queuing subsystem simulation model was established, researching on influence from customer arrival patterns, leaving the pattern, change of the rules to mechanism of hot metal temperature of each subsystem, which can optimize the main parameters of it and master key parameters of the queuing system on the performance of steady-state mechanism. "The model of one open ladle from BF to BOF" interface mode optimization program laid the foundation for an orderly dynamic operation in this area. |
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