简介：介绍了某钢厂2×240m2烧结机过程控制系统的组成、配置及各项控制功能的设计思想和实现方法。该控制系统采用集中分散型控制,具有控制功能强、结构简单、使用方便可靠等特点。

简介：Ni-W-P-CeO2-SiO2nano-compositecoatingswerepreparedonthecarbonsteelsurfacebypulseco-depositionofnickel,tungsten,phosphorus,nano-CeO2andnano-SiO2particles.Theinfluenceofnano-SiO2particlesconcentrationsinelectrolyteonmicrostructuresandpropertiesofthenano-compositecoatingswereresearched,andthecharacteristicswereassessedbychemicalcompositions,elementdistribution,depositionrate,microhardnessandmicrostructures.Theresultsindicatethatwhennano-SiO2particlesconcentrationsinelectrolytearecontrolledat20g·L-1,thedepositionratewith27.07μm·h-1andthemicrohardnesswith666Hvofthenano-compositecoatingsarehighest,elementlinescanningandareascanninganalysesshowthattheaveragecontentsofelementsW,P,SiandCeinthenano-compositecoatingsareclose,displayingthatthedistributionofeveryelementwithinthenano-compositecoatingsiseven.Anincreaseinnano-SiO2particlesconcentrationsinelectrolyte(whenlowerthan20g·L-1)leadstorefinementingrainstructureofnano-compositecoatings,butwhenitimprovedto30g·L-1,thecrystallitesizesincreaseagainandinthemeantimetherearealotofsmallbosswithnodulationshapeappearingonthesurfaceofnano-compositecoatings.

简介：Thenoveleomplexesofalkaliandrareearthmetalwithperiodatehavebeenpreparedforthefirsttime.ChemicalanalysisindicatesthatthecompositionofthecomplexesisM2LnIO6·xH2O（M=Li,Na,K;Ln=Pr,Tb）,andallofthecomplexeshavebeencharacterizedbyUV-Visible,IRspectroscopicstudies,susceptibilitymeasurementsandthermalanalysis.

简介：Glasseswiththecompositionof65GeO212Ga2O3-10BaO-8Li2O-5La2O3(molarratio)dopedwith1.526wt.%,3.006wt.%,5.836wt.%,11.028wt.%,and15.678wt.%Tm2O3,respectively,werefabricatedbyconventionalmeltingmethod.AccordingtotheabsorptionspectraandtheJudd-Ofelttheory,theJ-Ostrengthparameters(Ω2,Ω4,Ω6)werecalculated,withwhichtheradiativetransitionprobabilities,branchingratiosandradiativelifetimeswereobtained.Theinfraredemissionspectra(with808nmLDexcitation)at～1.47and～1.8μmofvariousconcentrationsofTm3+-dopedglasseswerestudied.Theemissionintensityat～1.8μmreachedtothemaximumwhentheTm2O3-dopingconcentrationwasneartobe～3.006wt.%(1.0mol.%),andthendecreasedasdopingconcentrationincreasedfurther.Themechanismofthefluorescenceintensitychangewasexplainedwiththecross-relaxationeffectandtheconcentrationquenchingeffectofTm3+.Meanwhile,accordingtoMcCumbertheory,theabsorptionandemissioncross-sectionscorrespondingtothe3F4→3H6transitionsofTm3+at1.8μmwasobtained.ForTm3+-dopedgermanateglasses,themaximumemissioncross-sectionreachedavaluehigherthanthatre-portedforfluorozircoaluminateglasses.Itisexpectedtobeafavorablecandidatehostfor～2.0μmmid-inflatedlaserbecausetheglassshowsfavorableopticalspectra.

简介：通过运用工艺流程参数梳理,分析影响余热发电的制约原因,找出关键影响因素,并提出必要可行的措施,包括优化原料结构、强化烧结生产操作、完善现有工艺条件以及加强设备管理等.经过一系列有效措施的制定并实施后,余热发电量明显提升,在降低工序能耗的同时实现了稳定高效生产.

简介：主要介绍了265m2烧结机自动化控制系统的结构及其主要控制功能,分析了故障诊断与报警、联锁的设计特点.该系统投运两年多来,运行平稳、质量可靠,取得了较好的成效.

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简介：针对莱钢型钢炼铁厂2号炉的影响炉况顺行和高炉燃料比等多个方面进行研究,通过“开发稳定焦炭干基入炉量控制技术”、“上部实现精准布料”、“酸性料及焦丁平铺技术”等创新技术的实施,最终实现延长高炉使用寿命和低燃料比冶炼的目的.

简介：TheinfluenceofrareearthoxideCeO2onmicrostructureandwearresistanceofM80S20thermalsprayandthermalsprayweldingcoatingsisstudiedusingopticalmicroscope,scanningelectronmicroscope,X-rayenergydispersionspectroscope,X-raydiffractometerandweartestingmachine.Theresultsshowthattheaddi-tionof8%CeO2canimprovethemicrostructure,microhardnessandwearresistanceofcoatingssignificantly.

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简介：通过分析三钢200m^2烧结机的点火现状及原因,提出了低负压点火烧结技术的改造方案。生产实践表明:改造后烧结料层厚度提高了54mm,烧结矿产量增加了4t/h,点火煤气消耗降低了159m^3/h,取得了良好的经济效益。

简介：Er~（3＋）andLa~（3＋）codopedY_2O_3nanocrystallinepowdersweresynthesizedbygelcombustionmethodandcharacterizedwiththermalanalysis,X-raydiffraction（XRD）,transmissionelectronmicroscopy（TEM）,high-resolutionTEM（HRTEM）techniquesandfluorescencespectroscopy.Afterbeingcalcinedat1200oC,the（Y_（1–x）La_x）_2O_3：Er~（3＋）powderswereconfirmedtobecubicY_2O_3phasewiththecrystallinegrainsizeintherangeof20–40nm.TheEr~（3＋）emissionat1.53μmfromthe~4I_（13/2）→~4I_（15/2）transitionwasobserved,whichwasfoundtobeenhancedbyintroducingLa~（3＋）ions.SuchenhancementcouldbeattributedtotheadjustmentofEr~（3＋）ions＇localenvironmentbythecodopingofLa~（3＋）ions,leadingtotheincreasedgroundstateabsorptioncrosssectionofEr~（3＋）ions.

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简介：运用有限元分析软件MIDAS,对30m跨度钢网架结构进行了静力、动力特性的计算,分析了其动力响应的特点,并根据规范要求对各工况荷载作用下的强度和刚度验算,其验算结果均满足现行规范要求.

简介：介绍武钢三炼钢800m~3/45m倒锥壳水塔施工——人工挖孔桩、水柜施工及施工中应注意的事项。

简介：ThechemicalstateofgrainboundarycosegregationofCeandPinFe-P-CealloysystemwasstudiedbymeansofAugerElectronSpectroscopy(AES).TheAugerpeaksofCesegregatedatgrainboundariesarefoundwithintherangeof60～180eV.BycomparingwiththeAugerspectraoftheFe-Ce-Pintermetalliccompound,itissupposedthatthereisatwo-dimensionalinterfacialphaseatgrainboundarieswithCeandPcosegregationwhichissimilartothestructureoftheFe-Ce-Pcompound.

简介：通过加强进厂原燃料管理、强化炉前出铁管理、实施大富氧率喷吹技术和优化高炉基本操作制度，太钢4350m^3高炉的燃料比降到500kg／t以下，利用系数达到了2．4t／m^3·以上，实现了高炉稳定、均衡和高效生产。

简介：宜春钽铌矿机电车间铆接班采用下列工艺措施完成一个焊道熔火线开裂至整个母材的4m~3电铲铲斗修复任务。1.先用102不锈钢焊条打底,再用高锰钢焊条填满;2.在电弧切割的同时浇水冷却,以

简介：太钢1350m3高炉在炉体破损严重的情况下,对高炉进行了大检修,并采取一系列强化冶炼的措施,收到良好效果.

简介：新区3200m3高炉喷煤系统采用中速磨负压制粉,一级高浓度低压脉冲长袋式收粉器收粉。喷吹系统采用双系列双罐并列单管路加分配器浓相输送工艺。喷煤系统按烟煤和无烟煤混喷设计,制粉系统按强爆炸性烟煤设计,最大喷煤比250kg/t,尾气排放煤粉质量浓度≤30mg/m3,喷煤系统投运后,运行正常,烟煤配比达40%,高炉喷吹效果良好。