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1、第35卷第2期礦冶工程Vo1．35№22015年04月MINGANDMETALLURGICALENGⅡ呵EERINGApril2015高硫高砷金精礦三相流化床流動特征模擬①李鴻莉，李陽東，李登新，印春生，(1．上海海洋大學(xué)海洋科學(xué)學(xué)院，上海201306；2．大洋漁業(yè)資源可持續(xù)開發(fā)省部共建教育部重點實驗室，上海201306；3．遠洋漁業(yè)協(xié)同創(chuàng)新中心，上海201306；4．東華大學(xué)環(huán)境科學(xué)與工程學(xué)院，上海201620)摘要：常溫常壓條件下基于歐拉模型，利用Fluent軟件對高1．61TI、內(nèi)徑0．09m的高硫高砷金精礦三相流化床流動特征進行了數(shù)值模擬。模擬過程以空氣為氣相且為連續(xù)相，
2、液態(tài)水為液相，密度為3．2g／am、粒徑為0．5mrtq的高硫高砷金精顆粒為固相。模擬結(jié)果顯示，流場的壓力從計算域的入口到出口逐漸降低，速度場的變化對氣液固局部相含率的分布影響顯著；在徑向上，氣含率()從計算域中心往邊壁降低，在軸向上也逐漸降低；固含率()從計算域的入口到出口逐漸減小，從計算域中心向邊壁s增加。模擬結(jié)果與實驗結(jié)果一致，可為合理設(shè)置氣流速度以及金礦投放量提供依據(jù)。關(guān)鍵詞：高硫高砷金精礦；三相流化床；流動特征；歐拉模型中圖分類號：TF041文獻標(biāo)識碼：Adoi：10．3969／j．issn．0253—6099．2015．02．024文章編號：0253—6099(201
3、5)02—0099—04SimulationofFlowCharacteristicsofThree．phaseFluidizedBedf0rHigh—sulfurandHigh-arsenicGoldConcentrateLIHong—li。’，LIYang—dong’，LIDeng—xin，YINChun·sheng’(1．CollegeofMarineSciences，ShanghaiOceanUnivemity，Shanghai201306，China；2．KeyLaboratoryofSustainableExploitationofOceanicFisheriesRe
4、sources，Minist~ofEducation，Shanghai201306，China；3．CollaborativeInnovationCenterforDistant-waterFisheries，Shanghai201306，China；4．SchoolofEnvironmentalScienceandEngineering，DonghuaUniversity，Shanghai201620，China)Abstract：ThenumericalsimulationwasconductedusingtheFluentsoftwarebasedontheEulermod
5、elfortheflowcharacteristicsofthree-phasefluidizedbedf1．6minheightand0．09mininternaldiameter)ofahigh—sulfurandhigh—arsenicgoldconcentrateundernormalconditions．Inthesimulation，airwastakenascontinuousgasphase，waterasliquidphaseandthehigh—sulfurandhigh—arsenicgoldconcentratewithparticlesizeof0．5m
6、manddensityof3．2g／eraassolidphase．Resultsshowedthatpressureoftheflowfieldreducedgraduallyfromtheentrancetotheexitofthecomputationaldomain．Thevariationinthevelocityfieldsignificantlyaffectedthedistributionoflocalphaseholdups．Thegasholdup()decreasedfromthecentertotheedgeofthecomputationaldomain
7、intheradialdirectionandgraduallydecreasedintheaxialdirectiontoo．Whilethesolidholdup()increasedfromthecentertotheedgeofthecomputationaldomain，butgraduallydecreasedfromtheentrancetotheexit．Thesimulationresultswereconsistentwiththeexperimentalre
