(1. 中南大學 能源科學與工程學院，長沙 410083；2. 金隆銅業(yè)有限公司，銅陵 244000)
摘 要: 以FLUENT 6.3 為計算平臺，建立了銅閃速爐熔煉過程數(shù)值模型，并針對高投料量下反應塔氣粒兩相變物理場信息分布變化特點展開仿真研究。結(jié)果表明：工藝風入爐后迅速膨脹，并在反應塔中心形成輪廓明顯的主體氣流柱；主體氣流柱內(nèi)外的溫度和氧濃分布梯度變化較大；局部低溫出現(xiàn)在精礦噴嘴下方,而高溫反應核心區(qū)域則下移至反應塔中下部。綜合多場耦合仿真結(jié)果可知：高投料量條件下精礦粒子與反應配風之間混合力度欠佳是造成高投料量反應塔內(nèi)熔煉過程反應效率降低的主要原因。
關鍵字: 銅閃速爐；反應塔；熔煉反應；數(shù)值模擬
smelting process in copper flash smelters at high loading rate
（1. School of Energy Science and Engineering, Central South University, Changsha 410083, China;
2. Jinlong Copper Co., Ltd., Tongling 244000, China）
Abstract:A numerical model was developed and the simulation was carried out with FLUENT 6.3 to investigate the distributions of multi-fields in the reaction shaft of a flash furnace at high loading rate. The results show that the process air expands quickly after it is fed into the furnace and forms a large downward gas column in the centre of the reaction shaft. Great gradients are found in the gaseous temperature and concentration destinations across the main gas column. Moreover, a low temperature region is found under the concentrate burner while a steady high temperature region appears in the lower part of the reaction shaft. The computation also reveals that the poor mixing between the gas and the concentrate particles is the main reason accounting for the decreased reaction efficiency of the smelting process in the reaction shaft of high productivity.
Key words: copper flash furnace; reaction shaft; smelting reaction; numerical simulation
