简介:Trendsintoday’ssteelproductionshowincreasingdemandsforhighly-sophisticatedsteelgrades.Therefore,thesteelindustrywilleventuallyberequiredtoinstallbestperformingtechnologiestomeetgovernmentalspecificationsdesignedtosignificantlyreduceenvironmentalemissions.Sucheffortsaresupportedbyinnovativenewsolutionsintheentiresteelmakingprocess.Oneprocessthatwillneedtobeaddressedisthecleanlinessofthesteelintheliquidsteelphase,especiallyduringtheBOF-tappingprocess.Thenewconvertergate(CG)(Fig.1)bestsupportstheslidegatetappingtechnologyforconvertersintermsofcleansteel,productivity,yieldandavailability-atreducedcosts.TheCGgateintroducesauniquefeatureforconverterslidegates:Thebottomplatecanbeexchangedwhilethegateremainsmountedontheconverter.Thisnewfeatureallowsforanincreasedutilisationoftherefractorypartsandasignificantreductionofthedowntimeoftheconverter.This'designedefficiency'isachievedwitharefractorysetconsistingofthreeidenticalplates-twobottomplatesandonesliderplate-andanozzle.AnumberofotherimprovementssuchasautomaticcylindercouplingusingtheInterstopSNAPtechnologyandatwosteptensioningsystemhavealsobeenimplemented.ThenewsystemisdesignedtomeetminimalspacerequirementsandthereforewilladapttomostBOFshops.Toperformpreparation,serviceandmaintenanceworkthemodularCGgatecanbedismountedfromtheconverterandsimultaneouslyreplacedbyaready-to-useunit.Thedegreeofautomationfordismountingandmountingaswellasforoff-linepreparationhasbeenenhancedandreducesmanualefforts.Thispaperprovidesasolutiontotheobvioustrendtowardsefficientandcontrolledproductionofcleansteel,ingeneral,andespeciallyatBOFshops.Moreover,itspecificallydescribestheoperationalresultsofthisinnovativeBOFtappingequipmentatSalzgitterFlachstahlGmbH,Germany.
简介:我国焦炭产量在2006年达到29768万吨,占全球总量的57%,成为世界最大的生产、消费和出口国。炼焦生产每年消费炼焦煤4亿多吨,耗费原煤量高达7~8亿吨,是名副其实的耗能"大户"。去年以来,在国家相关部委的推动下,全国累计淘汰落后焦炭产能1500多万吨,但焦化行业重复建设、盲