Design Of The Large PCI Automatic Control Based On AB-PLC

In recent years,New blast furnaces in China mainly dominated by largecapacity blast furnace.PCI as one of the important means of energy saving and consumption reduction of blast furnace,Received more attention.To ensure the continuous stability of PCI,Increasing PCI ratio,PCI automatic control system is paid attention to more by the steel trade.At present,Our country's PCI by overseas introduction,Such as Baosteel and Anshansteel,etc.Rely on its higher apparatus quality and more advanced automation,PCI ratio had already reached about 180-200kg/tFe,is higher than the domestic average level.This article is on the basis of drawing lessons from domestic and foreign existing PCI automatic control system,On Electrical?instrumentation?automation of PCI(abbreviated as 3 electric systems)design phase?debugging phase and trial production stage,Carry on the analysis and the proof to the existence difficulty and the main point,In particular,the control of PCI injection system made more innovative ideas and means of regulation,Solve the difficult point in the traditional control system,Realizes the PCI completely automatic injection.The key technology for PCI automatic control system-Continuous and stable injection,This article in a traditional manual calculation,regulation on the basis of related parameters of pulverized coal injection,Using PLC formidable handling abilities and so on sequential control,movement control,transmission and process control to spurt the coal system each parameter to carry on the real-time computation and the analysis,Regulate the systematic parameter related to amount of coal gushed out automatically,Pulverized coal injection for a steady flow,Maximum to reduce operation workers of worker and intervene the impact on continuous stability of the system.Take rockwell Automation ControlLogix as an example,PLC system used logix5000 programming software and FTVIEW SE monitoring software;Used equipment net bus-DeviceNet.Ethernet bus-EtherNET and Control network bus-ControlNet,These Seamless integration of network architecture Raising the level of automation of 3 electric systems.Through this innovative PCI automatic practice prove,The automatic degree of this system is high ? Pulverized coal particle size uniformity ? PCI flowrate is steady?BF distribution pulverized uniform?Systems running safe and reliable,These provides a strong guarantee for BF.At present this BF average PCI ratio achieved or exceeded 200kg/tFe,Has achieved the level of introduced.