铜闪速熔炼砷分配行为的数值仿真

Numerical Simulation of Arsenic Distribution Behavior in Copper Flash Smelting

摘要: 建立了铜闪速熔炼过程气粒两相间砷分配行为的数学模型，基于软件Fluent 6.3对其分配行为进行了数值仿真。仿真结果表明：Cu₃AsS₄的脱砷过程和As₂O₃的挥发过程均非常迅速，精矿脱砷过程在距离反应塔顶3 m的区域内基本完成，烟灰中As₂O₃的挥发过程在距离反应塔顶1 m的区域内基本完成；距离塔顶3 m以内的区域是调整砷在各相中分配的关键区域，对于所计算的工况，砷在熔体与气相中的分配比例分别为48.1%、51.9%。

Abstract: The numerical simulation model for the arsenic distribution behavior between gas and particle phases in a copper flash smelting process was established, and the distribution behavior was nu-merically simulated based on the software Fluent 6.3. The simulating results show that the arsenic was separated rapidly from Cu₃AsS₄ and As₂O₃ was quickly volatilized. The arsenic separation from the concentrate was almost completed within 3 m from the top of the reaction tower. The volatilization of As₂O₃ in the soot was finished within 1 m from the top of the reaction tower. The zone within 3 m from the top of the tower is the key to adjust the distribution of arsenic in each phase. For the simulated case, the proportion of arsenic distribution is 48.1% in the melt and 51.9% in the gas phase.