闪速炉沉淀池中熔体流动特性的数值模拟

摘要

A computational fluid dynamics (CFD) simulation was carried out with CFX4.3 to investigate the melt flow and temperature distributions in the settler of a flash furnace.Sixteen cases of one slag tap hole adopted with one matte tap hole (1-to-1)and one slag tap hole adopted with two matte tap holes (1-to-2) operation modes were modelled.The simulation results show that the melt flows are similar in both two operation modes,but evident circulations can be found in the case of the 1-to-2 operation mode.The combination modes of the slag and matte tap holes are found to have a significant effect on the temperature distributions of the melt.The melt temperature is more umform in the case of the 1-to-2 mode.Selection of a matte tap hole farther away from the inlet is more conducive to achieve a uniform distribution of the melt temperature in the settler in practical tapping operation.%采用CFX4.3对闪速炉沉淀池中的熔体流动和温度分布进行数值模拟研究.针对1个出渣口对应1个冰铜出口(1-to-1)与1个出渣口对应2个冰铜出口(1-to-2)这两种操作方案共设立16种计算工况.模拟结果表明,两种方案下熔体流动相似,但采用1 -to-2操作方案时,熔池中可见明显的回流.仿真中还发现,渣口与冰铜出口的不同组合方式对沉淀池中熔体温度分布的影响显著,其中在1 -to-2操作方案下,沉淀池中的熔体温度更均匀.在实际生产中,当采用远离沉淀池入口的放铜口进行操作时将更有利于实现沉淀池内熔体温度的均匀分布.