用于直接还原工艺的铁矿石球团的新型设计.pdf

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1、CLASSIFICATION C1-INTERNALNovel Design of Iron Ore Pellets For Direct Reduction ProcessA SABIC AffiliateOCTOBER 2024NOVEL DESIGN OF IRON ORE PELLETS FOR DIRECT REDUCTION PROCESSDr.Mohamed BahgatDr.Mohamed BahgatChief scientist,R&D,Hadeed,Saudi Arabiais one of the desired properties of iron oxide pel

2、lets for DR processes.HIGH REDUCIBILITYReduction with H2Fe2O3+3H2=2 Fe+3 H2OReduction with COFe2O3+3CO=2 Fe+3 CO2Hematite(Fe(Fe2 2OO3 3)Magnetite(Fe(Fe3 3OO4 4)Wustite(FeO)(FeO)Iron(Fe)(Fe)is controlled by gas diffusion and chemical reaction.REDUCIBILITY MECHANISMis reduction of the core part due to

3、 reducing gas penetration and chemical reaction progress.EXPECTED CHALLENGEINTRODUCTIONSCOPE OF WORK01030103THE RESULTTHE RESULTImproved reducibility:Save Gas Consumption and Gain Higher Productivity0202PELLET FIRINGPELLET FIRINGPorosity of core part will be increased in fired pellets CARBON ADDITIO

4、NCARBON ADDITIONProduce core/shell pellets with excess C in the coreEXPERIMENTAL WORKMixing iron ore&carbonCore preparationCore/shell pellet preparationFired pelletsMetallurgical/physical characterization Iron oreSemi-pilot study was conducted through highly qualified third party(SGA,Germany)(SGA,Ge

5、rmany)Pellet feed:68.0%Fe68.0%FeCore/shell thickness:25-75 /75-25%diameter 25-75 /75-25%diameter Carbon%:0-9 wt%0-9 wt%from the core mixtureFiring profileSemi-pilot study was conducted through highly qualified third party(SGA,Germany)(SGA,Germany)Pellet feed:68.0%Fe68.0%FeCore/shell thickness:25-75

6、/75-25%diameter 25-75 /75-25%diameter Carbon%:0-9 wt%0-9 wt%from the core mixtureFiring profileNOTESNOTESEXPERIMENTAL WORK1Mixing the content of core/shell pellet.2Rotating disc pelletizer.3Exact shape of core part.4Exact shape of core/shell Novel pellet.RESULTS&DISCUSSIONVisual observation for cros