电炉流程的物流管制之四──EAF-LF-CC生产流程钢包运输的物理模型

在对广州钢铁股份有限公司第一电炉炼钢分厂的生产工艺分析、研究的基础上，进行了时间因素的解析。运用物流学装卸搬运的理论，建立了钢包运输的物理模型。     

关于两部定价的理论研究

通过存在两类消费者情况下的两部定价模型推导出了最优两部定价公式。表明最优边际价格由各类消费者的偏好差异程度及边际生产成本决定,而固定费用主要取决于对商品具有较低效用评价的消费者的需求,并推导了固定费与需求弹性的关系以及最优边际价格的范围。     

电磁感应下渣检测技术模拟研究

为了详细了解连铸生产过程中电磁感应下渣检测技术,建立了电磁感应下渣数值模拟模型,并对模拟结果进行了分析。结果表明,副线圈中电流值随着钢水中渣含量的增加而近线性增大,偏渣对副线圈感生电流变化的影响也很明显,电流变化值随着偏移距离的增加而增大。     

一种镍基单晶合金的组织演化与蠕变行为

通过蠕变曲线测定及组织形貌观察,研究了一种镍基单晶合金的蠕变行为和变形特征.结果表明:单晶合金在试验的温度和应力范围内,对施加应力和温度有明显的敏感性.由所得数据测算出合金的蠕变激活能和应力指数.蠕变初期在施加温度和应力场的作用下,立方γ′相逐渐转变成与施加应力轴方向垂直的N型筏状结构.稳态蠕变期间,合金的变形机制是位错攀移越过筏状γ′相,由于高温蠕变稳态阶段形成的N型γ′相筏状组织厚度较小,位错易于攀移,因而合金具有较大的应变速率.蠕变后期,由于塑性变形,在近断口处筏形γ′相转变成与应力轴方向呈45°角的形貌,合金的变形机制是位错剪切筏状γ′相.     

找准党建工作切入点 充分发挥基层党组织基石作用

面对减员增效政策对企业员工的影响,三钢焦化厂坚持以问题为导向,组织人员深入基层调研,并通过党支部"政策宣传"、"知心访谈"、"提升技能"等方式,有效提高员工对改革的认识、理解、支持,充分发挥基层党组织的基石作用。     

影响电炉熔炼电耗的几项指标分析

吉林吉恩镍业股份有限公司冶炼厂以电炉熔炼、转炉吹炼生产高冰镍。本文重点分析电炉熔炼过程中影响电能消耗的几项指标,提出电炉生产节能的有效措施。     

Rare earth metal modified three dimensionally ordered macroporous MnOx-CeO2 catalyst for diesel soot combustion

Three dimensionally ordered macroporous(3 DOM) Ce-based catalysts were successfully prepared via a surfactant-assisted colloidal crystal template(CCT) route. The as-synthesized catalysts showed wellordered structures with macropores and small interconnected pore windows. The Raman results indicate that the catalyst persists pure fluorite cubic phases until the molar ratio of Mn exceeds 0.3, therefore MnO_x particles form and impede the contact of the active site and the reagent and restraining soot combustion. The doping of Nd into MnO_x-CeO_2 enhances the catalytic activity because of increased oxygen vacancy, Mn~(4+)content and stronger redox ability. Nd-doping also improves thermal stability of the catalyst due to less sintering and none phase separation after thermal aging. The fresh and aged Mn_(0.3)Ce_(0.6)Nd_(0.1)O_2 catalysts show the maximum oxidation rate for soot at 331 and 355 ℃ in the O_2/N_2 atmosphere, achieving a nearly 100% CO_2 selectivity.     

空芯玻璃微球表面改性及其介电性能研究

采用直流磁控溅射法对空芯二氧化硅微球表面镀Ni薄膜，利用扫描电镜对镀Ni膜微球形貌进行观察。结果表明获得了金属Ni包覆的玻璃微球。将镀Ni膜微球与高分子粘合剂混合制得人工介质材料，在一定频率范围内，测试其介电常数，并采用有效媒质理论对测试结果进行了分析。研究结果表明，在体积分数一定的情况下，介质材料的有效介电常数eeff随膜厚的增加而增加。eeff随着镀Ni微球体积分数的增加而增加，其实验值与有效媒质理论的C—M公式计算值较好地吻合。     

Mechanism of Thermal Decomposition of Rare Earth Acetate Hydrates

The mechanism of thermal decomposition of rare earth acetate hydrates(Ln(Ac)_3·nH_2O,n=5,forLn=La;n=4,for Ln=Pr→Lu,Y,except Pm)has been studied by TG-DTG,DSC,infrared spectra,X-raydiffraction and chemical analysis.The thermal decomposition reaction consists of two stages,one is dehydrationand the other one is decompostion.The final product is oxide.It has been found that the temperature of pro-ducing anhydrous acetates decreases with increasing atomic number of rare earth elements.The activation ener-gies for dehydration and decomposition reaction of rare earth acetate hydrates have been calculated byFreeman-Carroll and Kissinger method.The dependence of activation energy Jor dehydration reaction on theatomic number of rare earth elements shows“inclined‘W’effect”.The enthalpy changes for dehydration anddecomposition reaction have been determined.