攀西钒钛磁铁矿高压辊磨的产品特性.pdf

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1、第33卷第1期东北大学学报(自然科学版)Vo1．33，No．12O12年1月JournalofNortheasternUniversity(NaturalScience)Jan．2012攀西钒钛磁铁矿高压辊磨的产品特性袁致涛，郭小飞，严洋，一，韩跃新(1东北大学资源与土木工程学院，辽宁沈阳110819；2成都利君实业股份有限公司，四川成都610045)摘要：对攀西钒钛磁铁矿进行了高压辊磨超细粉碎，分析了不同粉碎工艺对粉碎产品粒度特性的影响，研究了不同粉碎方式下矿石Bond球磨功指数的变化以及微裂纹产生的情况．结果表明：辊面压力的增加使粉碎产品

2、的破碎比增大，粒度分布更加均匀；边料循环量的增加，使粉碎产品粒度变细，但均匀性降低；一3．2Inrn分级全闭路循环的粉碎产品与颚式破碎机产品相比细粒级含量明显增加，而且粒度分布更加均匀；高压辊磨机粉碎的钒钛磁铁矿石内部产生了大量的晶内裂纹和解离裂纹，使其BOnd球磨功指数(目标粒度0．074mm)比颚式破碎机的粉碎产品降低14．05％．关键词：钒钛磁铁矿；高压辊磨机；粒度特性；Bond球磨功指数；微裂纹中图分类号：TD451文献标志码：A文章编号：1005—3026(2012)01—0124—05ProduetCharacteristics0

3、fVanadium．TitaniumMagnetitefromPanxibyHighPressureGrindingRollerYUANZhi—t以0，GUOXiao-fei，YANYang一，HANYue-xi(1．SchoolofResources&CivilEngineering，NortheasternUniversity，Shenyang110819，China；2．ChengduLeejunIndustrialCo．，Ltd，Chendu610045，China．Correspondingauthor：GUOXiao-fei，E—

4、mail：gxf0957@126．COrn)Abstract：Vanadium—titaniummagnetitefromPanxiwassuperfinelycrushedbyhighpressuregrindingroller．Theparticlesizecharacteristicsofthecrushedproductfromdifferentcrushingprocesseswereanalyzed．andthemodificationoftheworkindexofballmil1andemergingofthemicr~cra

5、ckbydifferentcrushingmannerwerestudied．Theresultsshowedthat，incrushedproducts。thereductionratioincreasesandthesizedistributionbecomesmoreuniformwithincreasingofthepressureonrollersurfaces．Theparticlesizedecreasesbutuniformityreduceswithincreasingoftheedgeproductscirculating

6、mass．Andthefinefractioncontentofcrushingproductsfrom一3．2Inmclassificationclosed—circuitbyHPGRincreasesobviouslycomparedwiththatbyJawCrusherandparticlesizedistributioniSmoreuniform．Largeamountofintracrystallinecracksandcleavagecracksaregeneratedinvanadium—titaniummagnetitecr

7、ushedbvHPGR，whichmakestheBondworkindexofballmill(objectiveparticlesizeiS0．074mm)ofvanadium—titaniummagnetite14．05％lowerthanthatbyJawCrusher．Keywords：vanadium—titaniummagnetite；highpressuregrindingroller；particlesizecharacteristics；Bondworkindexofballmill；micro—crack磨矿作业能耗占整

8、个碎磨作业能耗的80％高压辊磨机是一种新型高效的破碎设备，具以上，“多碎少磨”理论是粉碎工程中节能技术快有单位破碎能耗和钢耗低、处理能力大、占地面积速发展的重要标志