不同工况下铜渣缓冷热场仿真研究

Simulation Study on Thermal Field of Copper Slag under Slow Cooling in Summer and Winter

以国内某企业闪速炉铜渣为研究对象,采用ANSYS软件,建立3D模型,研究了在夏季和冬季工况铜渣缓冷制度下的热场分布。结果表明:闪速炉铜渣在夏季和冬季缓冷时,其内部温度变化趋势基本相同,随着缓冷时间的增加,温度由内到外逐渐降低,高温区域不断缩小。但是夏季铜渣内部和渣包侧壁温度分布比冬季高,铜渣内部温度分布在12 h时温差达到最大67.86℃,在冷却水缓冷前两个小时温度下降最快,夏季和冬季降温速率分别为86.63、100.66℃/h。此阶段温度下降速度过快,不利于铜渣中含铜颗粒的长大。渣包侧壁自然缓冷时平均温度夏季比冬季高4.62℃,冷却水缓冷时平均温度夏季比冬季高3.96℃。在冷却水缓冷后期,渣包侧壁的温度下降缓慢,冷却水缓冷效果相比之前有所下降。

Copper slag of flash furnace was taken as research object,and a 3D model was established by ANSYS software to study heat field distribution of copper slag under slow cooling in summer and winter.The results show that temperature of copper slag changes in the same trend in summer and winter.With increase of slow cooling time,temperature drops gradually from inside to outside,and high temperature area continuously shrinks.However,temperature distribution in inner part and side wall of slag ladle in summer is higher than that in winter.Temperature difference in inner part of slag reaches 67.86℃at 12 h.Temperature drops fast at the first two hours with slow cooling water,and temperature fall rate in summer and winter is 86.63 and 100.66℃/h respectively.At this stage,temperature drops too fast,which is unfavorable for copper particles growth in slag.Average temperature of side wall of slag ladle is 4.62℃higher in summer than that in winter under natural slow cooling,while 3.96℃higher in summer than that in winter under slow cooling with water.In the later period of water cooling,temperature of slag ladle side wall drops slowly,and cooling effect drops compared with that in former.