Abstract:In the process of zinc roasting process, the internal reaction and state of the roasting furnace are critical to the roasting atmosphere and product quality. A real-time monitoring method for roasting process based on digital twin is proposed to solve the problem of "black box" of internal reaction in baking furnace, which leads to difficulties in state monitoring and optimal control. Firstly, the shrinking unreacted core model with constant particle size and the simplified two-phase fluidization theory are used to establish the mechanism model of zinc calciner. Based on the mechanism model, a digital twin system for monitoring the state of the calciner is developed, which realizes the 3D visualization of the reaction inside the calciner, alarm reminder and stable production. The field operation results show that the average error of the standard temperature of the boiling layer after the monitoring system is put into operation is only 4℃, and the standard deviation is reduced by 57.4% compared with the original system. This shows that this system has completed the real-time status monitoring and analysis of the baking furnace, which is of great significance to the stability and high-quality production of the baking furnace.