(1. 中南大學(xué) 能源科學(xué)與工程學(xué)院，長(zhǎng)沙 410083；
2. 深圳市中金嶺南有色金屬股份有限公司 丹霞冶煉廠，韶關(guān) 512325)
摘 要: 為了探究加壓浸出攪拌釜內(nèi)流場(chǎng)及溫度分布規(guī)律，本文基于Fluent軟件，采用SST k-ω湍流模型、歐拉-歐拉多相流模型以及多重參考系方法，在不考慮化學(xué)反應(yīng)的前提下，耦合氣液流動(dòng)、傳質(zhì)和傳熱，構(gòu)建加壓浸出攪拌釜內(nèi)流體流動(dòng)及傳熱傳質(zhì)的數(shù)學(xué)模型，并分析了釜內(nèi)氣液流場(chǎng)、溫度場(chǎng)的分布特征。結(jié)果表明：流體會(huì)在釜內(nèi)形成兩個(gè)主要循環(huán)區(qū)，槳葉后方出現(xiàn)“氣穴”現(xiàn)象；靠近球形釜壁處流體存在明顯的分層現(xiàn)象和局部高溫區(qū)；釜壁處擋板對(duì)攪拌流場(chǎng)及溫度場(chǎng)分布的影響較大，靠近擋板的位置流場(chǎng)分布更加紊亂，溫度更均勻。
關(guān)鍵字: 加壓浸出；攪拌釜；流場(chǎng)；溫度場(chǎng)；傳熱傳質(zhì)
（1. School of Energy Science and Engineering, Central South University, Changsha 410083, China;
2. Danxia Smelter, Shenzhen Zhongjin Lingnan Non-ferrous Metal Company Limited, Shaoguan 512325, China）
Abstract:In order to explore the flow field and the temperature distribution in the pressurized leaching stirred tank, the SST k-ω turbulence model, Euler-Euler multiphase flow model and multiple reference frame method were used to construct the mathematical model of the fluid flow, heat and mass transfer in the stirred tank. In the model, the gas-liquid flow, mass transfer and heat transfer were coupled while the chemical reaction was not considered. The gas-liquid flow field and the temperature distribution in the tank were analyzed. The results show that two main circulation areas are formed in the tank, and the "cavitation" occurs behind the blade. Obvious stratification and local high temperature regions are observed near the tank wall. The flow field and temperature distribution in the tank are considerably influenced by the baffle near the wall. The distribution of the flow field near the baffle is more chaotic while that of the temperature is more uniform.
Key words: pressure leaching; stirred tank; flow field; temperature field; heat-mass transfer
