简介:Insomesteelmakingworkshops,theexistedinherentweaknessesoftraditionalcarboncontainingbrickworkinglining,suchasjointopening,verticalcrackingoflining,andexcessiveerosionofbrickedge,madeithardtosatisfythedemandsofadvancedsteelproduction.Anew-typecarbonfreecorundumspinelbrickandcastableweredevelopedbasedonthematrixoptimizedanalysis,successfullyappliedforultra-lowcarbonsteelproduction.Theadvantagesofthenewlydevelopedcarbonfreeworkingliningaremainlyasfollows:1)theinherentweaknessesofjointopening,verticalcrackingoflining,excessiveerosionofbrickedge,etc.aresurmountedsuccessfully,whichimprovestheoperationalsafetyofladles;2)theoutertemperatureoftheladleshelldecreasesby45-50℃comparedwiththatofthetraditionalcarboncontainingbricklining;3)theservicelifeofnew-typeworkingliningis150-170heats,nearlydoublingthatofthetraditionalcarboncontainingbricklining;thespecificconsumptionofrefractoriespertonsteeldecreasesbyabout20%;4)thecarbonpickupofmoltensteelisnotobviouswhichismerely5-10ppm,whichsatisfiesthedemandsoflow&ultralowcarbonsteelproduction.
简介:摘要目前,炼钢普遍采用钢包精炼技术,将炼钢过程中脱氧、脱硫、降低气体、减少夹杂物、调整钢的成分和温度等工艺过程全部或部分转移到钢包炉中完成,以求获得洁净钢并取得高产、优质、低成本的良好效果。在LF精炼过程中,精炼渣的选择至关重要,目前我厂通常采用活性石灰和萤石等组成的渣。该渣综合脱硫率一般在8O%左右,每吨钢消耗渣料1O~15kg,此传统渣可满足一般品种生产的需要。但是,随着用户对钢的洁净度要求的不断提高,传统的渣由于功能单一、熔点高、脱硫率低和成份不稳定等,远不能满足钢包精炼炉对渣的要求,需要采用合成复合渣,通过合理的渣系配比,达到脱硫、脱氧等提高钢水纯净度的目的;同时,此渣吸收钢中夹杂物,控制夹杂物形态,减少萤石对钢包的浸蚀、提高钢包使用寿命;具有防潮不吸水的功能,因此可采购后在仓库存放较长时间而不粉化、不吸水,使用方便。因此,对LF炉应用合成复合渣有重要的意义。