Research On Stability Control Of Sintering Ventilation System

Being the key process for lean ore, the stability of sintering process is of great significance for making full use of China's lean ore. Practice shows that the change of technological operating parameters can affect the main ventilation system's kinetic parameters of gas. These changes will ultimately affect the safety, stability and efficiency of the equipment. Based on the gas dynamics of the main ventilation system, a CFD mathematical model is established to simulate the actual production process and explore consistently dependable control program of sintering so as to ensure the safe and stable operation of equipment and optimize production process.A two-dimensional model of sintering and ventilation system is built using ANSYS software based on compressible algorithm and RNG turbulence model. According to the differences of permeability layers, the influences of flow, vacuum and temperature of the main ventilation system are considered to analyze the aerodynamic characteristics of sintering process. Through the intermediate bonds of the main ventilation system performance, i.e., gas dynamics, the sintering equipment and sintering process are linked together, which can guide the production process and help solving the vibration problem of main Exhausters.The simulation results show that permeability layers should be kept within a reasonable range to ensure the normal operation of sintering process. The reasons of surge in sintered production are analyzed and the most fault-prone region in main ventilation pipe is obtained based on simulation results. It is helpful to optimize the sintering process and to improve the production of sintering. Some of the research results have been applied to the actual production process of the Xiangtan Iron and Steel Company, and achieved good economic results.