Design And Application Of Grate-Kiln Oxidized Pelletizing Plant Automatic Control System

With continuous development of international and home markets, the demands on product quality become higher and higher. So pursuing high-quality products and low-cost consumes is the first-line guarantee for corporation to be incincible position in furious market competition.The paper detailedly analysis the locale craftwork, control requirements and process characteristic of grate-kiln production line of 200Mt/a oxidized pellet plant of Anshan iron and steel group corporation. The design scheme of pellets sintering production system adopts advanced automation control technique in order to achieve real-time measurement to process variables, real-time supervise on craftwork flow and real-time control on process parameters. This dissertation has carried on the following research.(1) In combination with the technology characteristic of grate-kiln oxidized pellet sintering production line, the integrated automation system for pelletizing productive process is proposed, which is composed of device control system and process control system. Based on SIEMENS Profibus-DP field bus and industrial Ethernet technology, the hardware configuration, network topology and control functions of pellets sintering integrated automation system is introduced in detail.(2) The software design of pellets sintering integrated automation system uses modularization frame ideology. The lower computer uses software STEP 7 to program PLC in order to collect the locale data, filter noise and feed back control. The upper computer adopts configuraton software WinCC 6.0 to carry out software integration in order to provide intuitionistic and friendly human-machine interface.(3) A soft sensing model for grate subsystem is proposed by adopting the Takagi-Sugeno model to predict the permeability of the pellets sintering...