Magnesium Production By Aluminothermic Reduction In Vacuum And Thermodynamic Analysis

In recent years, the production and consumption presents of magnesium and magnesium alloy become the last rising trend, and instead of steel and aluminum alloy to widely used in various fields. Rich and excellent quality magnesite resources in Liaoning province, and magnesite as material refining metal magnesium will be realized in Liaoning. Through the concept of entropy production rate in the thermodynamics of irreversible processes in the applications of thermal and chemical. From the perspective of energy saving, to analyze and optimization of thermal process and equipment has the very vital significance.Energy and the environment is important issues of common concern all over the world, and is also the important issue of socio-economic development. When we development of a variety of clean energy and the rational use of energy, save energy dissipation devices and change the traditional craft route work of energy conservation is also very necessary. Magnesium industry on the energy consumption is huge, and through research magnesium production process of research and analysis of energy consumption while raising the quality of elemental magnesium also has important significance to energy conservation and emissions reduction.Use the concept of classic effective thermodynamics and energy level to analyze magnesium production process, that can be used to process evaluation and analysis, at the same time can be used to Thermodynamic perfection of system evaluation and analysis, and we can make the thermodynamic perfection in the sense of weak links as the main direction of energy saving. Classical thermodynamics analysis can’t reveal in the thermal process and heat for the effective loss reasons of dynamics, but use entropy production rate analysis method can reveal heat thermal process and equipment in the dynamics of effective loss reasons, so as to make up for the effective analysis and level analysis method.This thesis, according to the design of the reaction and the new process parameters, and according to a new analysis of reaction parameters such as temperature and pressure conditions of gibbs energy, to determine the reaction under the new process parameters meet the requirements needed for production. According the condition of the new process parameter optimization of production equipment,t to build mathematical physical model for the production equipment, and to simulation temperature of the equipment, and it can get equipment everywhere temperature satisfy the process requirements., Make the specific production system as the research object use the theory of thermodynamics, and use entropy as a major means of research to study magnesium production process, to analysis system of thermodynamics perfect and effective dynamic reasons of loss. Application of the principle of minimum entropy production rate, to discussed the environmental impact of magnesium thermit smelting process, and under the condition of satisfy the technoiogical requirements for the purpose of least entropy, in order to improve the utilization rate of energy and reduce pollution and waste.This thesis define temperature field entropy analysis model, and use it to analyze within the furnace material heat transfer temperature field entropy. Reveals the influence of the thickness and the diameter of the material’s internal temperature field entropy, so according to the actual situation and analyze data to improve magnesium smelting reduction furnace tank size. And reveal to add the amount of material, in order to achieve minimum heat loss and entropy production, so as to achieve the purpose of energy saving and emission reduction.