Research And Application On Process Control System Of Blast Furnace

By regard the rebuild of BenGang Blast Furnace NO.1 as background, the process control system of blast furnace is discussed in this paper. And then researches are done on the design, formation and implementation of control system.Through the introduction of the process of blast furnace, the analysis of the blast furnace process is made. And the basic idea of the blast furnace control is studied. The structure and function of the blast furnace control system are used to form the foundation of blast furnace automation systems and the blast furnace processcontrol system.Something important are discussed in the paper. The structure of the blast furnace control system, basic automation system, the expert system structure, characteristics of the structure of the system are all included. Control algorithm is discussed, including PID control, decoupling control and Smith predictive compensation control. And it also makes some research on the part of the control algorithm and expert system features, for example, control function,management function, maintenancefunction and explain function. Especially the function of furnace temperature control and BF operation are researched very well.Based on BenGang Blast Furnace NO.1, it is completed to design the blast furnace process control system. Software and hardware of the control system are introduced. It makes Vairon expert system and Ovation basic automation system come true in BenGang Blast Furnace NO.1.This system is good when it controls bacthing system, feeding system, dust-removal system, hot blast stove system and so on. It is outstanding when open-loop system switches to close-loop system.The results show that the system has a good performance. With the help of this system, BF meet the design production in one month. With it, the automation level of blast furnace production is inreased, and the time between various processes is decreased. Fuel proportion is optimized because of that system. And blast furnace production fluctuation is also reduced. It ensures long-term stable operation of the blast furnace and increases production efficiency and product quality.