Fused Magnesia Furnace Electrode Center Circle Optimization Research

China is the largest producer of fused magnesia for its maximal production in the world. At present, most fused magnesia enterprises are still using original EAF production methods from internationally40,50s, resulting low power, small-capacity, low efficiency. Although some of the producers of fused magnesium are changing to the high power mode in the furnace gradually, but theory furnace of the power production process is insufficient, which results that unsatisfactory of the actual production, low yields, high energy consumption problem still has not been solved.The optimization of the high-power fused magnesium furnace is quite few, mainly in the following two ways:(1) Use a large diameter furnace smelting furnace to reduce the heat loss, while preheating the skin sand of material, but also affecting the melting crystallization effect of the lump inside.(2) Use heat recovery systems after completion of fused magnesium smelting. Heat recovery can be effective, but the effective utilization of geothermal energy can not be increased. In fused magnesium furnace process parameters, the parameters can be easily adjusted is pole diameter. Choosing the right pole diameter to smelt, in order to get a larger area of the pool and ensure the effective crystallization effects while improving energy efficiency.This paper first presents a method for calculating the pole diameter, and the establishment of a calculated diameter of the pole relationship. Second, use Ansys to analyze the factors like pole diameter that affect the size of the pool area, in order to identify the factors with a reasonable way to get the maximum bath area. Finally, according to the results of analysis to analyze energy-saving methods of on-site furnace.We calculated the heat of arc to heat the pool at line current at the12kA. Use Ansys software to establish electric arc furnace finite element model to calculate the fused magnesium furnace Joule heat distribution of the pool area. During current gradually decreases, bath Joule heating power and the proportion of thermal power of the arc changes. Meanwhile, ues Ansys software to simulate the cooling curve over time of temperature field, analyze the crystallization process of fused magnesium and obtain time interval of cooling nucleation and grain growth process during magnesium melting lump.To improve the EAF energy-saving effect, paper simulate the relevant factors affecting the size of the molten area. This paper first proposed the calculation methods to select the area of the circle on the pole, gives the factors relationship of pole diameter and the total power consumption of the furnace. Under the simulated furnace size, calculate the size of the melting of the pole diameter. Secondly,study the affects of the changes of pole diameter to the size of the molten area, verify the pole diameter of the calculation method proposed is feasible. Finally, study the effects of different current and electrode diameter size to the molten region, analyze its changes with changes of current and electrode diameter.In this paper, combine with the actual production and use pole round selection method mentioned in chapter three to make energy-saving improvements of on-site furnace. First, calculate actual energy savings based on field data, then use Ansys software to calculate the energy section of the improved furnaces from two angles of with and without heat recovery system, thereby compare the improved furnace energy saving effect.