简介：无底柱分段崩落法，因采场结构简单、机械化程度高，成本低和生产安全等优点，在金属矿山获得迅速推广。但无底柱分段崩落采矿方法矿石是在覆盖层废石的包围下放出，矿石的贫化及损失较大，且较难控制。进路断面是影响矿石的贫化损失的重要因素之一，通过极限平衡理论，结合目前矿山巷道锚杆支护技术来合理确定进路极限宽度，对影响进路极限宽度的主要因素进行详细分析，进而为降低无底柱分段崩落采矿法的贫化损失提供理论参考。

简介：通过对金川三矿区矿岩结构和放矿控制机理的分析，提出了自然崩落法放矿控制的步骤和方法。

简介：本公司通过对碳酸法沉淀稀土的大量研究,对传统工艺进行了诸多改进。实验结果表明:新的沉淀工艺可使晶型沉淀粒度得以有效控制,沉淀物易过滤,易洗涤,操作方便等优越性。整个过程可在2—3小时内完成,并且可通过一定的辅助手段降低稀土氧化物中杂质含量:

简介：本文结合氧化铝生产实际，通过分级设备、循环负荷、入磨矿石粒度等对磨矿效率的影响的分析，指出了完善和优化格子磨——旋流器一段闭路磨矿工艺和进一步降低入磨矿石粒度是提高磨矿效率的有效途径。

简介：本文介绍了山东铝业公司第二氧化铝厂的能源使用概况，通过对该厂拜耳法生产氧化铝的能源结构及工艺特点的分析，指出了该厂节能的重点，从高效节能设备的应用、技术进步、科学管理三个方面总结了节能工作所取得的成效，提出了下一步的节能打算。

简介：介绍了气相法白炭黑的制备原理与生产工艺，通过解决生产过程中的技术难点及创新点，提高了白炭黑的产品质量，降低了生产成本，促进了资源的循环利用。

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简介：美国宇航局在加州帕萨迪纳的喷气推进实验室研究成功了一种制造YBa2Cu3O7-α高温超导电缆（封装在金属套管内）的新方法。据称,这种方法成本较低,过程易于控制,且对各种前体材料有很强的适应能力。该法分4个步骤:生产具有化学（配）比的前体（Precursor）粉;将前体粉包封在金属套管内;用轧制的方法使前体粉固结;在液态锂金属浴槽内进行处理,使之转变成超导组

简介：TheTiO2nanomembranedopedbyREionswerepreparedbymixingREionsintoTiO2solutionandthephoto-catalyticpropertiesofthecoatingglasswithTiO2membranedopedbyREionstomethylbenzenedegradationunderultravioletwereinvestigated.AFMphotoesshowthatthesurfaceofcoatingglasswithTiO2nanomembranedopedbyCe3+,Ce4+,Y3+arecomposedofparticleswithdiametersof30～50nm.Theresearchesonphoto-catalyticpropertiesprovethatthesurfaceofcoatingglasswithTiO2nanomembranedopedbyREionspossessesgoodphotocatalyticpropertiesunderultravioletandthedegradationpercentsofmethylbenzenearemorethan90%whenthedegradationtimeisshorterthan160min.WhenthemoleratioofCe3+,Y3+,Ce4+toTiO2is0.002thedegradationpercentsofmethylbenzenearerespectively92.85%,91.87%and91.15%under254～365nmultravioletin50μg·ml-1methylbenzenesolution.ThephotocatalyticabilityofthesurfaceofcoatingglasswithTiO2nanomembranedopedbyCe3+underultraviolettodegrademethylbenzeneincreasesastheconcentrationsofREionsincreaseandtheiroptimumpercentageofdegradationare98.50%,97.50%and96.35.5%respectively.Thehighertheconcentrationofmethylbenzenesolutionthelowerthepercentsofthemethylbenzenedegradationofthecoatingglassare,andthebiggertheratiooftheareasofcoatingglasstothevolumeofmethylbenzenesolutionthehigherthedegradationeffectofmethylbenzeneis.

简介：Ceriasphereswithdifferentsizesandsulfurizedproductswithcorrespondingmorphologywerepreparedbyhydrothermalandgas-solidreactionmethodat600–800°CunderCS2atmosphereforashorttime,respectively.Dimensionaleffectinpreparationofγ-Ce2S3wasfirstlyinvestigatedbymeansoftechniquessuchasscanningelectronmicroscopy(SEM),X-raydiffraction(XRD),thermalgravimetricanalysis(TGA)andspectrophotometer.Theresultsshowedthatwhenceriananoparticleswithsmallsizewereusedasprecursors,theγ-Ce2S3couldbepreparedatthelowertemperatureandthebadlysinteredproductswereobtained;whenceriananoparticleswithlargesizewereemployedasprecursors,pureγ-Ce2S3wasdifficultlyobtainedevenifthetemperaturewasupto800°Candtheproductstendedtokeeptheiroriginalsize.Theheat-resistancepropertyoftheγ-Ce2S3withlargesizewasbetterthanthesmallerone,andthepureγ-Ce2S3preparedfromprecursorwithsmallsizehadagoodpigmentaryperformance.

简介：经过槽下系统的设备改造,实现了槽下过筛,入炉粉率降低,为一系列的技术进步提供了基础保障,阐述了各项生产技术进步与生产实践.

简介：CeO2nanoparticles(nano-CeO2p)wereaddedintolasercladdedNiCoCrAlYcoatingsonNi-basedsuperalloysubstratetoimprovethemicrostructureandproperties.Scanningelectronmicroscope(SEM),X-raydiffractometer(XRD),micro-hardnesstester,andheattreatmentfurnacewereemployedtoinvestigatetheirmorphologies,phases,micro-hardnessandthermalshockresistance,comparedwiththecoatingwithoutnanoparticlesadded.Theresultsshowedthatthemicrostructureandpropertiesofthecoatingswiththeaddition...

简介：对梅钢2号高炉封炉后的开炉快速达产实践进行了总结。实践表明,通过进行充分的开炉准备,实施科学合理的开炉方案以及精心地操作调剂,高炉顺利开炉,3d快速达产。

简介：AseriesofLa2O3/MCnylonnanocompositeswerepreparedviainsitupolymerization.Theeffectsofcontentofnano-La2O3onthemechanicalpropertiesofnanocompositeswerestudied.Dispersionofnano-La2O3inMCnylonmatrixwasobservedwithSEM.ThecrystalstructureofnanocompositeswascharacterizedbymeansofXRD.SEManalysisshowsthatLa2O3nanoparticlesareuniformlydispersedinMCnylonmatrixandlittleclusteringexistswhenthecontentofnano-La2O3islowerthan1%,however,whenthecontentofnano-La2O3ismorethan1%,itbeginstocluster.XRDanalysisindicatsthatnano-La2O3doesnotchangethecrystalstructureofMCnylon.Mechanicalpropertiestestsshowthatthetensilestrength,elongationatbreak,impactstrength,flexuralstrength,andflexuralmodulusofnanocompositesfirstincreasethendecreaseasthecontentofnano-La2O3isincreased.Whenthecontentofnano-La2O3is0.5%,thetensilestrengthandelongationatbreakofnanocompositesreachmaximum,whichare17.9%and52.1%higherrespectivelythanthoseofMCnylon.Whenthecontentofnano-La2O3is1.0%,theimpactstrength,flexuralstrengthandflexuralmodulusofnanocompositesreachmaximum,whichare36.6%,12.7%and16.3%higherrespectivelythanthoseofMCnylon.

简介：Anisotropicstructures,nanoneedles,andnanospindlesofrareearthhydroxychloride(RE(OH)2Cl)andoxychloride(REOCl)(rareearth=EuandTb)weresynthesized.Therareearthhydroxychloridenanostructureswereformedviaathermallyassistedhydrolysisoftherare-earthsesquioxidenanocrystals.Themorphologicalevolutionofthenanostructureswasstudiedusinghigh-resolutiontransmissionelec-tronmicroscopyandscanningelectronmicroscopy,whilethestructuralevolutionwasinvestigatedusingX-raydiffractiontechniques.Thethermalstabilityoftherareearthhydroxychlorideswasinvestigatedusingthermogravimetricanalysis.Therareearthoxychloridenanospin-dlesweresynthesizedviaasimpleheat-treatmentofrareearthhydroxychloridenanospindles.

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简介：介绍宁钢2号高炉热风炉因隔墙砖发生坍塌导致低风温生产而带来的问题,并针对问题提出相应的技术操作措施,包括通过改进送风模式稳定风温水平,通过采取上、下部调剂相匹配的措施保证气流的稳定分布,通过调整进风口面积和炉顶压力维持一定的鼓风动能和理论燃烧温度,通过控制合适的炉温和炉渣碱度确保炉况稳定顺行。

简介：TheAu/CeO2catalystsweresynthesizedbyco-precipitation(CP),deposition-precipitation(DP)andmetalliccolloidsdeposition(MCD)method,andtestedforoxidationofvolatileorganiccompounds(VOCs).ItwasrevealedthattheAu/CeO2catalystpreparedbyDPmethodwasthemostefficientcatalysttowardsthetotaloxidationoftoluene.TheAu/CeO2catalystshadobviouslyhighcatalyticactivity,andthebestresultswasobtainedon3wt.%Au/CeO2catalystpreparedbyDPmethod.Thesecatalystswerechara...

简介：文章对用物理选矿去除锆刚玉中玻璃的方法进行了试验研究。含Na2O2．75％的锆刚玉经重选法去除玻璃后，Na2O含量可降至1．34％，其质量达到SJ-36锆刚玉砖的原料要求。

简介：采用活性炭吸附法对株冶冶炼废水进行了COD去除研究，考察了pH值、反应时间、活性炭用量、反应温度对去除率的影响。结果表明：采用粉末活性炭为吸附剂，当pH值为8．5，搅拌时间为0．5h，活性炭用量为0．25g／L，温度为25℃时，COD去除率达到64．87％，出水COD约为20mg／L。