Research Of Critical Measurement Technology For Temperature And Pressure In Smelting Process Of Scrap Copper

The demand of copper will increase as the rapid development of economy, but the copper resources of world are very limited, the development of scrap copper smelting technology is especially important. In the process of scrap copper smelting, the furnace temperature field and pressure have great effects on environmental refining furnace, only know the exact temperature distribution in the furnace in order to better control the quality of copper, however, at present the technology for real-time detection on-line to furnace temperature field isn't rip yet. According to the practical problem to be urgently solved, we manage to solve the problem that the results of off-line numerical simulation transplant into on-line dynamic simulation with the two-stage numerical simulation method by using computer simulation technology, and realized the dynamic real-time display of temperature field, achieved to monitor and diagnose to furnace condition effectively. Through establish the signal processing model for measurement loop of furnace pressure, analysis and research the method for reducing the system fluctuation when data acquisition and signal processing of furnace pressure and use the simulation method to verify the advantages and rationality of the processing model.The main work is as follows:1) This paper described coupling numerical simulation method of multi-field, including temperature field, pressure field, velocity field, and calculated the mathematical model with applying theκ-εmodel of two-way gas turbulence, the model of radiant heat transfer using heat flux and other models and made multi-block non-uniform structured meshing technology to build physical model for environmental refining furnace.2) The paper discussed in detail and deduced the two-stage numerical simulation calculation method of furnace field, and calculated the furnace field with applying two-stage simulation method. When the operating conditions have changed little, put the furnace temperature field distribution to be concerned with operating parameters and to linearize the influence that operating parameters on furnace temperature field, resulting in linear relationship between temperature field and operating parameters to realize the real-time dynamic display to temperature field3) This paper introduce the signal processing model for measurement loop of furnace pressure, the method of acquiring and treating pressure measurement signal to reduce the fluctuation of the system was studied and analyzed in detail. This model can meet the technology requirements of furnace pressure control of environmental refining furnace from the simulation results.This thesis shows that numerical simulation of furnace process in environmental refining furnace with proper mathematical models and calculation method is viable. The numerical simulation of distribution of temperature field, pressure field and velocity field in furnace are reasonable and they can reveal the actual, heat transfer in furnace. The above results are of important theoretical and practical meaning for optimizing operation parameters, making environmental refining furnace running steady and safely with high-efficiency.