(1. 中南大學(xué) 能源科學(xué)與工程學(xué)院，長沙 410083；2. 中南大學(xué) 流程工業(yè)節(jié)能湖南省重點(diǎn)實(shí)驗(yàn)室，長沙 410083
3. 東營方圓有色金屬有限公司，東營 257091)
摘 要: 采用FLUENT軟件，分別選擇k−ε系列湍流模型和雷諾應(yīng)力模型(RSM)對底吹熔池熔煉爐內(nèi)的高溫熔體氣液兩相流進(jìn)行數(shù)值模擬，并且依據(jù)相似原理，通過水模型實(shí)驗(yàn)對數(shù)值模擬結(jié)果進(jìn)行驗(yàn)證，綜合評價(jià)發(fā)現(xiàn) Realizable k−ε模型的計(jì)算精度最高。選用Realizable k−ε模型，對氧槍布置方式及直徑對底吹熔池熔煉過程的影響進(jìn)行數(shù)值模擬研究，結(jié)果表明：在一定范圍內(nèi)，適當(dāng)增大氧槍傾角有利于底吹熔池熔煉過程的進(jìn)行，當(dāng)單排氧槍傾角在17°~22°之間時(shí)，熔池各指標(biāo)均處于較好的水平；相對于現(xiàn)場工況，雙排氧槍傾角分別為12°和22°時(shí)，熔池的攪拌效果顯著增強(qiáng)；當(dāng)氧槍傾角為20°時(shí)，其有效攪拌區(qū)直徑為1.475 m，對應(yīng)的合理氧槍間距為0.98~1.23 m；適當(dāng)減小氧槍直徑可以有效提高熔池氣含率。
關(guān)鍵字: 底吹熔池熔煉；湍流模型；氧槍；數(shù)值模擬
（1. School of Energy Science and Engineering, Central South University, Changsha 410083, China;
2. Hunan Key Laboratory of Energy Conservation in Process Industry, Central South University, Changsha 410083, China;
3. Dongying Fangyuan Non-ferrous Metal Co., Ltd., Dongying 257091, China）
Abstract:FLUENT was used to simulate the high temperature melt multiphase flow in oxygen-enriched bottom-blowing bath smelting furnace with a series of k−ε models and Reynolds stress model. Based on similar principles to verify and compare the numerical simulation results with water model experiment. It is indicated that the realizable k−ε model has the best result. Realizable k−ε model is chosen to simulate the influence of lance arrangement and diameter on the oxygen-enriched bottom-blowing bath smelting process. Based on the result, appropriate increase of the lance inclination is helpful for oxygen-enriched bottom-blowing bath smelting process, and when a single row of lance inclination between is 17°−22°, the bath indicators are all in a good level. Relative to site conditions, when the double lance inclinations are 12° and 22°, the bath mixing effects are significantly enhanced. When the lance inclination is 20°, the effective mixing zone diameter is 1.475 m, corresponding to the best lance spacing of 0.98−1.23 m. Appropriately reducing lance diameter can effectively increase the bath gas rate.
Key words: oxygen-enriched bottom-blowing bath smelting; turbulence model; lance; numerical simulation
