Numerical simulation on ignition process of sintering ignition furnace in lead-zinc smelting
To investigate the multi-physical field distribution of the ignition process in the sintering ignition furnace in the lead-zinc smelting process,this paper took a belt-type ignition furnace of an enterprise as the research object,conducted a detailed numerical simulation research of ignition process in the ignition furnace by constructing a mathematical-physical model of the flow,combustion and heat transfer process of natural gas in the furnace,and considering the influence of the chemical reaction heat of lead-zinc mine and the resistance of the mineral layer.The distribution of velocity,temperature and concentration fields in the furnace was analyzed in depth,the temperature uniformity of the ignition mineral layer was evaluated and the causes were analyzed,the optimization and modification suggestions for the furnace were summarized at the end.The results show that high-speed airflows moving in opposite directions from the ignition burner form an impact surface,which destabilizes the stabilization of the flow field in the furnace;the ignition belts are mainly located in the material surface area below the two rows of main burners;the airflow in the main burner is deflected by the influence of the ignition burner,resulting in a local low temperature zone on the material surface of the ignition belt,which is not conducive to the uniform ignition of the material layer.
sintering ignition furnacelead-zinc smeltingnumerical simulationburnerstemperature distribution
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