铁水预处理用耐火材料研究

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1、上海交通大学硕士学位论文铁水预处理用耐火材料研究姓名：蓝振华申请学位级别：硕士专业：材料科学及工程指导教师：田守信20090216铁水预处理用耐火材料研究6.结合体系对喷枪浇注料性能的影响：不同结合体系在不同温度段对喷枪浇注料性能有不同的影响，本试验结果证明，以水泥和ρ-Al2O3按1：4的比例复合加入为最佳。关键词：铁水预处理、喷枪、铝碳碳化硅质、耐火材料VI铁水预处理用耐火材料研究AbstractMoltensteelrefiningandmoltenironpre-treatmentaretwoimpo

2、rtanttechnol-thogieswhichdevelopedrapidlyinironandsteelindustryfromthemiddleof20century.From1980son,thesetwotechnologiesbecomekeycriterionsoftheadvancedmanufacturingprocessandproductqualityiniron&steelindustry.Asthepretreatmentprocess,moltenironpretreatment

3、isveryimportantforsubsequentlyprocess.BaoshanIron&SteelCo.,Ltd(Abbr.Baosteel)hadintroducedthetechnologyandequipmentsfordesulphurization,dephosphorization,desiliconizationinmolteniron.Itplaysgreatroleindevelopinghighqualitysteelandoptimizationoftheironandste

4、elmakingprocess.NowanewblastfurnaceputintoproductioninBaosteel.Thevolumeofthemoltenironincreasedlargely.Butthepretreatmentequipmentshavenotincreasedaccordingly.Andtherefractorynormallyusedcan’tmeettherequirementofsuchhighfrequencyusage.Soitisurgenttoincreas

5、ethelifeoftherefractory,especiallytheAl2O3-C-SiCbrickandlance.ThethesisstudiesonAl2O3-C-SiCproductandcastablesforspraygun.Theresultsareasbelow:1.TestresultsontheinfluenceofSiConAl2O3-C-SiCproduct’sstructureandperformanceshowesthat12%SiCaddedisoptimal.2.Test

6、resultsontheinfluenceofCcontentonAl2O3-C-SiCproduct’sstructureandperformanceshowesthat12%Caddedisoptimal.3.TestresultsontheinfluenceofMgOcontentonAl2O3-C-SiCproduct’sstructureandperformanceshowesthat40%MgOaddedisoptimal.4.Testresultsontheinfluenceofaggregat

7、eoncastableperformanceofspraygunshowsthatgradedaggregatewillimprovetheperformanceobviously,especiallyonthermalshockresistant.5.TestresultsontheinfluenceofdifferentadditivesoncastableperformanceofspraygunshowsthatandalusiteandSiCwillimprovethermalshockresist

8、ant.VII铁水预处理用耐火材料研究6.Testresultsontheinfluenceofbindersystemoncastableperformanceofspraygunshowsdifferentbindersystemhasdifferentinfluenceatcertaintemperaturerange.Andasawholethecementandρ-Al2O3composi