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1、第35卷第3期中国矿业大学学报Vol.35No.32006年5月JournalofChinaUniversityofMining&TechnologyMay2006文章编号:100021964(2006)0320341206Falcon选矿机的分选机理及其应用123333温雪峰,潘彦军,何亚群,赵跃民,宋树磊,段晨龙(1.清华大学环境科学与工程系,北京100084;2.河北金牛能源股份有限公司东庞矿,河北邢台054201;3.中国矿业大学化工学院,江苏徐州221008)摘要:Falcon选矿机是一种新型的离心分选机.为研究其分选机理,以FalconSB离心分选机
2、为例,建立了球形颗粒在离心分选机分层区和分选区的动力学方程.分析结果表明,在FalconSB分层区,高强度离心加速度是实现微细颗粒快速沉降的关键因素;分选区内独特的流态化反冲水形成流态化床层,使得微细高密度颗粒穿过床层沉积到来复圈槽中,而低密度颗粒所受的离心力较小,加上难以克服反冲水的作用而进入尾矿,从而实现了不同密度微细颗粒的有效分选.采用FalconSB40选矿机分选-0.074mm电路板的试验结果表明:在入料浓度为40g/L,给料速度为160L/h,反冲水压力为0.01MPa,滚筒旋转频率为50Hz时,一次分选获得金属富集体的品位为76.89%,回收率82
3、.19%,综合效率80.77%.关键词:Falcon选矿机;重力分选;离心分选;回收中图分类号:TD455;TD922文献标识码:AStudyonSeparationMechanismofFalconConcentratorandItsApplication1233WENXue2feng,PANYan2jun,HEYa2qun,ZHAOYue2min,33SONGShu2lei,DUANChen2long(1.DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity.Beijing1000
4、84,China;2.DongpangMine,HeibeiJinniuEnergy&ResourcesCo.Ltd,Xingtai,Hebei054201,China;3.SchoolofChemicalEngineeringandTechnology,ChinaUniversityofMining&Technology,Xuzhou,Jiangsu221008,China)Abstract:Falconconcentratorisoneofthenewcentrifugalseparatorsdevelopedinrecentyears.AFalconSBc
5、oncentratorwasemployedandthekineticequationsforsphericalparticlesinsegregationzoneandseparationzonewereproposedrespectively.Analysisresultsindicatethatenhancedcentrifugalaccelerationisthekeyfactorforthequicksettlementoffineparticleinsegregationzone.Inseparationzone,auniquelyfluidized
6、bedisformedduetotheexistenceofanti2pressurewater,andunderthismode,thefineheavyparticlescanperforatethroughthefluidizedbedandreachitsbottomtogetconcentrated.Thelighterparticlesmoveoutwardsto2wardsthecenterofthebowlandreporttothetailingsduetorelativelysmallercentrifugalforceandtheactio
7、nofanti2pressurewater.Thereforedensity2basedparticleseparationiseffec2tivelyachieved.SeparationexperimentswereperformedusingaFalconSB40concentratortorecovermetalsfrom-0.074mmprintedcircuitboards.Theresultsshowthataconcentrate收稿日期:20050520基金项目:高等学校博士学科点专项科研基金项目(20030290015)作者简介:温雪峰(19
8、75),男,河北省内丘县
