唐山鑫虎一步法回转窑生产还原铁热压块项目One-stepRotaryKilnProducingReducingIronHot-pressingBlockProject一步法回转窑生产还原铁热压块项目工艺简介IntroductionoftheProcess还原铁热压块(HBI)生产工艺ProductionProcessofReducedIronHot-pressingBlock(HBI)用***或煤气做热源的回转窑还原技术+热压成型钝化机压块是我公司新研发生产还原铁热压块新工艺技术，新工艺节能环保，已经申报***发明zhuanli。我公司研发的回转窑+热压成型钝化工艺，与传统工艺有了很大改进，用***或煤气做热源，用CO气体和无做还原剂，不但回转窑操作变得简单，回转窑结圈几率降低，运行更可靠，同时由于增加了热压成型钝化系统，大限度防止了再氧化和利用了余热，降低了能耗和生产成本。Rotarykilnreductiontechnologywithnaturalgasorgasasheatsourceandpassivatorpressingblockbyhotpressingarethelatestresearchanddevelopmentofnewtechnologyforproducingreductionironhotpressingblockbyourcompany.Thenewtechnologyisenergy-s***ingandenvironmentalprotection,andhasdthenationalinventionpatent.Itnotonlymakesrotarykilnoperationeasy,Rotationkilnringingratebecomeslowerandtheoperationismorereliable.Atthesametime,duetotheadditionofpassivationsystemforhotpressingforming,thewasteheatismaximallyutilized,andtheenergyc***umptionandproductioncostarereduced.该工艺主要针对铁矿粉或氧化铁皮进行还原，所用原料有铁矿粉（氧化铁皮）、还原剂（CO+无）及脱硫剂。主要设备包括配料压球系统、烘干加热系统、二次燃烧室系统、回转窑还原系统、热压成型钝化系统、尾气抽风净化系统、喷煤系统和循环水冷却系统等。Theprocessismainlyaimedatreducingironorepowderoroxidescale.Therawmaterialsusedareironorepowder(oxidescale),reducingagent(CO+anthracite)anddesulfurizer.Themainequipmentsincludebatchingandball-pressingsystem,dryingheatingsystem,secondarycombustionchambersystem,rotarykilnreductionsystem,hotpressingpassivationsystem,exhaustairpurificationsystem,coalinjectionsystemandcirculatingwatercoolingsystemetc.主要工艺流程是铁粉、氧化铁皮、粘结剂按一定比例混合后，通过皮带机输送到强制混料机中，经过强制搅拌混合的料通过皮带机进入储料仓中，储料仓4个，下面安装有圆盘给料机，可根据压球机产量调节圆盘给料机给料量，铁粉料通过皮带机加到压球机中，压球机压好的球，通过皮带机进入链板式烘干机中。铁粉球在链板式烘干机中被来自烧结回转窑的热风烘干加热，二次燃烧室排出的高温尾气直接进入烧结回转窑，烧结回转窑烧结的球团,温度高达11０0℃，密闭送进还原回转窑中进行加热还原，经回转窑还原的高温还原球团在窑头出料口进行筛分，筛下物加湿降温后有螺旋上料机排出，费焦经处理后，颗粒料可以继续使用。筛上的热还原球团经压块机进行热压钝化处理，终出还原铁热压块（HBI）产品。Themainprocessisthataftermixingironpowder,ironoxidescaleandbinderinacertainproportion,thematerialisconveyedtotheforcedmixerthroughbeltconveyor.Afterforcedmixing,thematerialisenteredintothestoragebinthroughbeltconveyor.Therearefourstoragesiloswithdiscfeedersinstalledbelow.Thefeedingquantityofdiscfeedercanbeadjustedaccordingtotheoutputofballpress.Ironpowderisaddedtotheballpressthroughbeltconveyor.Theballpressedbythemachineentersthechainplatedryerthroughthebeltconveyor.Ironpowderpelletsareheatedbyhotairdryingfromsinteringrotarykilninchainplatedryer.Thehightemperaturetailgasfromsecondarycombustionchamberenterssinteringrotarykilndirectly.Thesinteredpelletsinsinteringrotarykilnarefedtoreductionrotarykilnatatemperatureashighas1100C.Thehightemperaturereductionpelletsreducedbyrotarykilnarescreenedattheoutletofkilnhead,andthesievematerialishumidifiedandcooled.Thescrewfeederdischargesthecoke,aftertreatment,thegranularmaterialcancontinuetouse.Thehotreductionpelletsonthesievewerepassivatedbyhotpressingwithacompactor,andthereducedironhotpressingblock(HBI)productwasfinallyproduced.)