高硫高砷金精矿三相流化床流动特征模拟.pdf

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1、第35卷第2期矿冶工程Vo1．35№22015年04月MINGANDMETALLURGICALENGⅡ呵EERINGApril2015高硫高砷金精矿三相流化床流动特征模拟①李鸿莉，李阳东，李登新，印春生，(1．上海海洋大学海洋科学学院，上海201306；2．大洋渔业资源可持续开发省部共建教育部重点实验室，上海201306；3．远洋渔业协同创新中心，上海201306；4．东华大学环境科学与工程学院，上海201620)摘要：常温常压条件下基于欧拉模型，利用Fluent软件对高1．61TI、内径0．09m的高硫高砷金精矿三相流化床流动特征进行了数值模拟。模拟过程以空气为气相且为连续相，

2、液态水为液相，密度为3．2g／am、粒径为0．5mrtq的高硫高砷金精颗粒为固相。模拟结果显示，流场的压力从计算域的入口到出口逐渐降低，速度场的变化对气液固局部相含率的分布影响显著；在径向上，气含率()从计算域中心往边壁降低，在轴向上也逐渐降低；固含率()从计算域的入口到出口逐渐减小，从计算域中心向边壁s增加。模拟结果与实验结果一致，可为合理设置气流速度以及金矿投放量提供依据。关键词：高硫高砷金精矿；三相流化床；流动特征；欧拉模型中图分类号：TF041文献标识码：Adoi：10．3969／j．issn．0253—6099．2015．02．024文章编号：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