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通过分析传统球团料在还原罐内的温度分布,提出了以改进布料方式缩短硅热法炼镁还原周期的必要性.研发了一种新型炼镁料块,运用FLUENT软件对料块的传热过程进行数值模拟,分别研究了料块的高度、外缘高度、内孔直径、上下面直径、凹槽直径和凹槽个数对料块传热过程和镁产量的影响.发现当料块的高度为100 mm、外缘高度为50 mm、内径为100 mm、上下面直径为200 mm、凹槽直径为50 mm和凹槽个数为8个时,单炉镁产量最高为318 kg.h-1,较传统球团料提高43.9%,吨镁煤气消耗量降低了30.5%.通过实验得出料块内部的温度分布与数值模拟的结果一致,说明数值模拟的模型是可靠的.
Based on the analysis of the temperature distribution of the traditional pellets in the reduction tank, the necessity of shortening the reduction cycle of magnesium by silicon thermal method was put forward, and a new type of magnesium ingot was developed. By using FLUENT software, Thermal process of numerical simulation, respectively, the height of the material block, the height of the outer edge, the diameter of the hole, the diameter of the upper and lower surface, the groove diameter and the number of grooves on the heat transfer process and the magnesium yield. With a height of 100 mm, an outer rim height of 50 mm, an inner diameter of 100 mm, an upper and lower diameter of 200 mm, a groove diameter of 50 mm and a number of grooves of 8, the maximum magnesium output per single furnace was 318 kg. h-1, which is 43.9% higher than that of conventional pellets and 30.5% of the consumption of tonal magnesium gas.The temperature distribution inside the block is in good agreement with the numerical simulation results, which shows that the numerical simulation model is reliable.