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1、第33卷第1期礦冶工程Vo1.33№12013年02月MGANDMETALLURGICALENGINEERINGFebruarv2013原礦粒度對鄂西高磷鮞狀赤鐵礦直接還原焙燒同步脫磷的影響研究①郭倩,孫體昌,李永利,翟棟,張士元,劉志國(1.北京科技大學金屬礦山高效開采與安全教育部重點實驗室,北京100083;2.中國科學院過程工程研究所,北京100190)摘要:為探究不同粒度(一13mm、一8mm、一2mm)的鄂西高磷鮞狀赤鐵礦直接還原焙焙燒同步脫磷效果,進行了直接還原焙燒一磁選試驗研究,考察了焙燒時間、焙燒溫度、還原劑用量以及脫磷劑用量對直接還原效果的影響。結果表明:直接還原焙燒較大粒
2、度的高磷鮞狀赤鐵礦是可行的,隨著粒度的增大,鐵的品位并沒有下降,但是回收率有所下降,而且達到最佳條件所需的溫度提高、焙燒時間延長、還原劑用量減少、脫磷劑A的用量增加、脫磷劑B的用量變化不大?!?3mm粒度原礦直接還原焙燒.磁選在最佳條件下可得到鐵品位93.39%,鐵回收率83.58%,磷含量0.094%的直接還原鐵。關鍵詞:鮞狀赤鐵礦;直接還原焙燒;脫磷;還原鐵;提鐵降磷;粒度中圖分類號:TF111文獻標識碼:Adoi:l0.3969/j.issn.0253-6099.2013.01.016文章編號:0253—6099(2013)01—0060—05EfeelsofPartideSizeof
3、RawOreonDirectReductionRoastingandSynchronousDeph0sph0rizat0nofHighPhosphorusOoliticHematitefromWesternHubeiGUOQian,SUNTi-chang,LIYong—li,ZHAIDong,ZHANGShi-yuan,LIUZhi-guo(1.KeyLaboratoryoftheMinistryofEducationofChinaforHigh—EfficientMiningandSafetyofMetalMines,UniversityofScienceandTechnologyBeij
4、ing,Beijing100083,China;2.InstituteofProcessEngineering,ChineseAcademyofSciences,Beijing100190,China)Abstract:Inordertoresearchtheresultsofreductionroastingandsynchronousdephosph0rizationofdifferentsizesofhigh-phosphorusoolitichematitefromwesternHubei,experimentsofdirectreductionroastingandmagnetic
5、separationwereconductedtoinvestigatetheeffectsofroastingtimeandtemperature,reductantdosageanddephosphorizerdosageontheindexesofdirectreduction.Theresultsshowthatdirectreductionroastingandsynchronousdephosphorizatonisfeasibleforhighphosphorusoolitichematiteironwithlargesize.Withanincreaseinthepartic
6、lesize,thereSnode-creaseinirongradebutoneinironrecovery,withthebestroastingtemperatureandroastingtimeallincreased,andde—phosphorizerdosageincreased,thebestreductantdosagedecreasedbutnochangeinthebestdephosphorizerBdosage.Thedirectreductionroastingandmagneticseparationoftheraworewithsizeof——13mmcano
7、btaindirectreductedironwithirongradeof93.39%,ironrecoveryof83.58%andphosphoruscontentof0.094%underoptimalconditions.Keywords:oolitichematite;directreductionroasting;dephosphorizati0n;reducediron;ironincreas