Numerical Simulation Of The Heating Cycle Of The Preheating Furnace Of Mandrel-Numerical Simulation Of Temperature Field In The Mandrel Section

The preheating furnace of mandrel is important equipment of the producing of steelpipes rolling.The function of the mandrel is that heating the mandrel up to thetemperature of being adequate for rolling from normal temperature. The mandrel is themost important heat-forming tool in MPM. In the first place,the mandrel funneledthrough the bloom;In the second place,steel rolling.The preheating furnace of mandrelcan roll out different kinds of the seamless steel pipes. The seamless steel pipes aremain production of raw materials used for the cannula material,the link hoop materialsof cannula,the pipes of fluid deliverying,the high-pressure boiler tubes,low/mediumboiler tubes,the hydrunlic supports tubes,the cylinder cannula,the equipment of fertilizerhigh-pressure tubes,the structure tubes,the vessel tubes,the cold-draw cannula materialsand so on.The preheating furnace of mandrel is important equipment of working procedure ofsteel rolling, the heating cycle not only influences out put cost but also quality.Theheating cycle of the preheating furnace of mandrel technology lies on type of furnaceand curve,rule of gas flow and heat exchange in hearth, heat up techniques andtemperature system, assign heat and heat balance in furnace.The paper researches the preheating furnace of mandrel of Baotou Iron and steel159MPM, the purpose of training is optimizing the heating cycle of the preheatingfurnace of mandrel,and researches the gas flow、heat transfer and the temperaturedistribution in the preheating furnace.Using k-turbulence model、convective heat-transfer model,it established the mathematical model of gas flow,and heating mandrel ofthe preheating furnace,got a detailed conclusion on temperature and velocitydistribution of the hot-air.Of the mathematical model of the mandrel,dispersing themathematical model of the mandrel by finite difference scheme,the applied the result tosimulate heating process of the mandrel and get the temperature at any one time and atany position,the difference in temperature in break surface and the time of out-put themandrel.Provide the optimized pyrology parameters for the manufacturing departmentsand determine the optimum heating operation,hit the mark of improving the heatingofficiency and energy saving,direct the production practice.In order to check the reliability and the factuality of the numerical results of mathematical model, the paper has made measure to the hot-air temperature of thepreheating furnace of mandrel. The numerical results of the mathematical model werecompared with the measure of hot-air temperature, which verified the factuality andreliability of the mathematical model. The result sets important theory support tooptimize the designing and operating of the heating cycle of the preheating furnace ofmandrel.