简介:Water-insolublebagassexanthateswerepreparedbyxanthationofalkalifiedcellulosesbytreatingbagassewithchromiumhydroxidereactioneffluent.TheremovelofnickelfrombothtestsolutionsandelectroplatingindustrialwastewatersampleswithBXwasinvestigated.TheprocesswasstudiedtakingintoaccountsuchparametersaspHofwater,precipitationtime,xanthatedosageandstoragetimeofBX.Theseproductswrerfoundtobehighlyefficientinremovingnickel.Theresidualconcentrationofnickelaftertreatmentcanbereducedtoavalueoftheordorof0.01mg·l^-1.
简介:TheSteelAISI4145HMforseniorpetroleumdrillofBXSteelwasproducedbythefollowsheet:hotmetalpretreatment→converter→LF→RH→caster350mm×470mmrectangularbillet→hotdelivery→reheating→800millrolling→insulation→straightening→anneal→grinding→inspection→packagingandpayintotreasury→shipment.SelectedBXSteelparticularhormetal,adoptedhotmetaldesulphurizationpretreatmenttechnology.TheLFrefiningmakingthewhiteslag,andkeepacertaintime.TheRHtreatmentmustmakesurethevacuumdegreeandrefiningtime,moreimportantlycontrollingargonblowingprocess.Inaddition,mustdesignpropertechnologydatacontinuouscastingsimilarsuperheat,castingspeed,andspecificwaterflowrate.Dependontechnologicalmeasures,theproductbeenhadseriesofthequalities:homogeneityofchemicalcomposition,lowcontentofharmfulelements,highpurity,compactorganization.Adoptedtheprocessofcastingbillethotdeliveryandhotcharging,usedsteppingheatingfurnace,anddesigningreasonablethermalparameters.Two-highreversingmillroughrollspreparationsquarebillet,short-stress-pathrollingmillrollsroundbar.Steelproductsbadholdingandcontrollingsoakingtimeandtemperature.Steelproductsbadannealed,andannealingprocessmustbeencontrolledforensuringsteelhardnessuniform.Foravoidingresidualstress,steelbeenstraightenedbeforeanneal.Thetestresultsandusingeffectshowsthattheproducingwithuniformannealinghardnessandniceprocessingproperties,niceoverallmechanicalproperties,wererecognizedbyusers.
简介:ThepapershowsthemainsurfacedefectsofcoldrollingautomobilesheetinBXSteel.Themainsurfacedefectsareunusualdefects.Thetypicalfamiliardefectsaresliverandpunctuatesthatareontherollingdirection.Theinclusionsofsteel-makingandscalesofhotrollingprocessarethemaincausesofdefects.Theyarethebiggestproblemspuzzlecoldrolledautomobilesheetsurfacequality,andaretheburningissuesofBXSteel.Weclassifyandanalysisthedefects.Weobservethepanoramaofsurfacedefectsusingportablevideomicroscopyapparatus,andcleanthesampleusingultrasonicshaker,analysisthedefectspatternandchemicalcompositionusingscanningelectronmicroscope.Atpresenttheprimarydefectsthatimpactedcoldrolledautomobilesheetqualityaredarksliverdefects.Wecontrolthesteel-makingandhotrollingprocessaimingatthecauseandpositionofdefectsmaking.Wefinecontroltheoperatingofsteelladle,gating,castingsystemandcontinuouscastingmachineinsteelmakingprocess.Thescaledefectisreducedbycontrollingfurnace,highpressurewaterdescalingsystemandfinishmilldescalinginhotrollingprocess.Alonewiththereformingandrenewingofequipment,gatheringproducingexperience,thecoldrolledautomobilesheetqualitymadeinBXSteelisupgradinggradually.
简介:CEVA发布全新的通用混合DSP/控制器架构CEVABX,用于满足语音、视频、通信、传感和数字信号控制应用中的数字信号处理的新算法需求。CEVABX架构提供电机控制和电气化所需的通用DSP功能,可将CEVA的市场范围扩展到新兴的汽车和工业市场。目前,这些这些市场领域采用的传统DSP和DSP协处理性能较低的MPU/MCU不能完全满足需求。CEVA-BX采用的全新DSP架构结合了DSP内核固有的低功耗和大型控制代码库的高级编程和紧凑代码大小要求。CEVA-BX使用11级流水线和5路VLIW微架构,提供了采用双标量计算引擎的并行处理、加载/存储和程序控制,达到2GHz主频(基于台积电(TSMC)的7nm工艺节点,使用通用标准单元和存储器编译器)。