基于现场总线的全分布式铝电解槽自动控制机

应用串行通信方式的现场总线及网络通信技术，研制出具有多CPU网络体系结构的新一代全分布式槽控机，有效地解决了槽控机结构简洁与功能分布之间的矛盾，按智能化、模块化及全分布式的设计原则开发槽控机逻辑单元的功能模块，各功能模块均带有自己的CPU，所以能相对独立地运行，且数据处理能力强大，由于各功能模块的功能明确，结构简单，并设计有自诊断功能，所以易于维护，使用错误处理和抗干扰能力强大的现场总线实现功能模块间的互联，使模块间的连接线大大少于基于并行总线的槽控机的模块间连接线，且能保证模块间数据交换稳定可靠，多CPU协同工作方式又使槽控机整体功能强大，可满足对电解铝过程高度智能化控制的要求，在75kA铝电解槽牙的应用证明了技术方案的有效性与先进性。     

坑探工程危险有害因素的安全对策

结合实际,对坑探工程危险有害因素采取的安全对策进行了探讨。     

Industrial preparation and performance testing of property-modified prebaked carbon anodes for aluminum electrolysis

1　ＩＮＴＲＯＤＵＣＴＩＯＮＩｔｉｓｗｅｌｌｋｎｏｗｎｔｈａｔａｌｕｍｉｎｕｍｅｌｅｃｔｒｏｌｙｓｉｓｉｓａ“ｌａｒｇｅｆａｍｉｌｙ”ｏｆｅｌｅｃｔｒｏｅｎｅｒｇｙｃｏｎｓｕｍｐｔｉｏｎ .Ｉｎｔｈｅｍｅａｎｔｉｍｅ ,ｃａｒｂｏｎａｎｏｄｅｓａｒｅｕｓｅｄｕｐｃｏｎｔｉｎｕｏｕｓｌｙｉｎｔｈｅｐｒｏｃｅｓｓｏｆｅｌｅｃｔｒｏｌｙｓｉｓ ,ｓｏｔｈｅａｌｕｍｉｎｕｍｅｌｅｃｔｒｏｌｙｓｉｓｉｓａｌ ｓｏｃａｌｌｅｄ“ｌａｒｇｅｆａｍｉｌｙ”ｏｆｃａｒｂｏｎｃｏｎｓｕｍｐｔｉｏｎ .Ｆｏｒａｌｏｎｇｔｉｍｅ…     

Coupled computation method of physics fields in aluminum reduction cells

1　COUPLEDRELATIONOFPHYSICSFIELDINCELLSTherearesiximportantphysicsfieldsinalu minumreductioncells[13] ,suchaselectricfield ,magneticfield ,temperaturefield ,flowvelocityfield ,concentrationfieldandstressfield .Therelationsa mongthesephysics propertiesareshownasFig .1.　　　　Inregardtorelationofsixfields ,electricfield(electriccurrentandpotentialdistribution)istheen ergyfoundationofoperationandsourceoftheotherphysicsfieldsinreductioncells .Firstly ,electriccur rentcausesthemagne…     

Preparation and preliminary testing of cermet inert anode for aluminum electrolysis

1　INTRODUCTIONAluminumhasthelargest productivityamongthenonferrousmetals ,2 4Mtperyearintheworld .Whilegreatprogresshavebeenmadeintheprimaryaluminum production ,theindustrycontinuestopur sueresearchtosolvesomeformidablechallenges ,suchas quitealargeenergyintensity(14 0 0 0 15 0 0 0kW·hpertonaluminum) ,highcon sumptionofcarbonanode(5 0 0 6 0 0kgpertonalu minum) ,significantemissionsofgreenhousegas(1.71tpertonaluminum )andotherdetrimentalgases ,highcapitalinvestmentandcost[1] .Inertelectr…     

Thermal stability and oil absorption of aluminum hydroxide treated by dry modification with phosphoric acid

The dry modification of aluminum hydroxide powders with phosphoric acid and the effects of modification of technological conditions on thermal stability, morphology and oil absorption of aluminum hydroxide powders were investigated. The results show that the increase of mass ratio of phosphoric acid to aluminum hydroxide, the decrease of mass concentration of phosphoric acid and prolongation of mixing time are favorable to the improvement of thermal stability of aluminum hydroxide; when the mass ratio of phosphoric acid to aluminum hydroxide is 5:100, the mass concentration of phosphoric acid is 200 g/L and the mixing time is 10 min, the initial temperature of loss of crystal water in aluminum hydroxide rises from about 192.10 to 208.66 ℃, but the dry modification results in the appearance of agglomeration and macro-aggregate in the modified powders, and the oil absorption of modified powders becomes higher than that of original aluminum hydroxide.     

面向业务的云计算IaaS研究

虽然现有的基于云计算laas相关解决方案较多,但均是通用的体系架构设计,没有考虑到上层业务的特点,从而在应用时业务提供效率不高.文章参考面向服务的理念,重构IAAS的基础平台设计,在引入虚拟化技术实现物理资源的松散耦合基础之上,提供基于策略的管理机制以优化服务部署、服务监控和服务调度等全生命周期,以实现资源层对上层服务层的充分感知,从而有效提高云计算IAAS的性能以及服务能力的QOS.     

GM(1,1)模型在铝电解氧化铝浓度估计中的应用研究

详细介绍了灰色GM(1,1)模型的原理及建立步骤.将CM(1,1)模型引入到铝电解氧化铝浓度估算中,对基于Kalman滤波的氧化铝浓度自适应估算模型进行修正.灰色模型建模维度为5,对采用浓度自适应估算模型得到的浓度与实际浓度的偏差序列进行预测,将预测值反馈到浓度自适应估算模型中,形成新的浓度估算值.通过对电解生产中的30余组氧化铝浓度工艺数据进行估算,结果表明,经修正后,浓度估算值与实际值变化趋势保持一致,基本能满足铝电解工业现场的应用要求.     

Effect of CaO doping on mechanical properties and thermal shock resistance of 10NiO-NiFe2O4 composite ceramics

The CaO doped 10NiO-NiFe2O4 composite ceramics were prepared by the cold isostatic pressing-sintering process, and the effects of CaO content on the phase composition, mechanical property and thermal shock resistance of 10NiO-NiFe2O4 composite ceramics were studied. The results show that the samples mainly consist of NiO and NiFe2O4 when content of CaO is less than 4%（mass fraction）, bending strength increases obviously by CaO doping. Bending strength of the samples doped with 2% CaO is above 185 MPa, but that of the samples without CaO is only 60 MPa. Fracture toughness is improved obviously by CaO doping, the samples doped with 2% CaO have the maximum fracture toughness of 2.12 MPa·m^1/2, which is about two times of that of the undoped ceramics. CaO doping is bad to thermal shock resistance of 10NiO-NiFe2O4 composite ceramics.     

Effect of metallic phase species on the corrosion resistance of 17M/（10NiO-NiFe2O4） cermet inert anode of aluminum electrolysis

1 INTRODUCTIONThere are many disadvantages in the presentaluminumelectrolysis with carbon anode ,such assevere energy consumption,carbon wasting,envi-ronmental pollution and so on.Inert electrode sys-tem can overcome these disadvantages[1 3]. Re-cently ,the researches of the inert anode materialshave mainly been concentrated on alloys[4]and cer-met materials[5 ,6]. NiFe2O4based cermets , whichpossess not only high electrical conductivity ofmetal but also good corrosion resistance of cera…