STUDY ON AUTOMATIC IN-LINE MEASUREMENT OF FeO CONTENT IN AGGLOMERATE

In this paper, the mechanism of physicalmethod for measuring the FeO content in agglomerate replac-ing the chemical method is proposed after studying the elec-tromagnetic property of the agglomerate. The microcomputer-measuring system for FeO content is provided. Attention is al-so paid to introducing the working principle of the H-typecompensation sensor and the processing method of the mea-sured data. This system has been successfully applied in prac-tice to in-line measure the FeO content.     

重钢三烧降低烧结算FeO的技术研究

对重钢三烧条件下影响烧结矿FeO的因素进行了分析。找出了降低烧结矿FeO的技术途径，并结合现实条件实施了降低烧结矿FeO的措施，取得了良好的效果．     

Pu在铁及铁氧化物上的吸附行为研究

为了解放射性核素在可能作为高放废物固化体包装容器材料及其腐蚀产物上的吸附行为,研究了包装容器材料的主要组分铁及铁的腐蚀产物FeO,Fe2O3,Fe3O4对Pu的吸附行为,探讨了水相pH值（1．0～10．0）,CO3^2-离子浓度（4．0 mmol/L～0．1mol/L）等因素对吸附的影响。实验结果表明,Pu在铁及其氧化物上的吸附能力随水相pH值增大而增大;实验环境中氧浓度变化对Pu在铁及其氧化物上的吸附影响较小;CO3^2-浓度增大不利于Pu的吸附。     

鞍钢烧结矿适宜FeO含量的研究

在实验室条件下，研究了烧结工艺参数与烧结矿FeO含量的定量关系及烧结矿FeO含量对烧结矿冶金性能的影响。结果表明，从FeO含量对烧结矿产量和质量指标的影响看，烧结矿FeO含量在8．08％-9．70％范围内较适宜；从FeO含量对冶金性能指标的影响看，烧结矿FeO含量在7．18％～8．08％范围内较适宜。综合分析结果，鞍钢烧结矿FeO含量应控制在8．00％左右较适宜。     

Thermodynamic Properties of Dilute Aluminum in Liquid Zinc

Abstract

The thermodynamic properties of the liquid zinc-aluminum system in the range of 0 to 0.36 mole fraction of aluminum and over a temperature range of 430 to 530 °C were investigated by using an electromotive force (EMF) cell of the type

Al(s)|LiCl–KCl–AlCl₃|Zn–Al(l),Mo

The activity of aluminum was found to show a significant positive deviation from Raoultian behaviour. The activity coefficient of aluminum in the dilute solution range (γ°) and the free energy of solution of aluminum based on the one weight percent (1 wt %) standard state were determined as a function of temperature and found to follow the relationships:

logγ°=(1195/T)?0.874

ΔG_s=5457?11.4T (cal/mole)

Over the temperature range investigated, the self-interaction coefficient of aluminum in liquid zinc (e^Al_Al) was found to be approximately constant at ?0.01.

On a étudié les propriétés thermodynamiques du système liquide zinc-aluminium, entre 0 et 0.36 fraction molaire d'aluminium, à des températures de 430 à 530 °C, en utilisant une cellule à force électromotrice (FEM) du type:

Al(s)|LiCl–KCl–AlCl₃|Zn–Al(l),Mo

On a trouve que l'factivite de l'faluminium montrait une deviation positive importante du comportement Raoultien. On a determine le coefficient d'factivite, γ°, de l'faluminium pour une solution diluee ainsi que l'fenergie libre de solution de l'faluminium, base sur l'fetat standard de un pour-cent en poids (1%), en fonction de la temperature. On a trouve que ceux-ci suivaient les relations suivantes:

logγ°=(1195/T)?0.874

ΔG_s=5457?11.4T (cal/mole)

Dans le domaine de température étudié, on a trouvé que le coefficient d'auto-interaction de l'aluminium dans le zinc liquide (e_Al^Al) était approximativement constant à ?0.01.     

高热装铁水比冶炼工艺的优化

 针对电弧炉炼钢过程中石灰消耗较高、炉渣中FeO含量过高的问题,研究了温度、炉渣成分、渣量、流渣时机对脱磷的影响以及终点碳含量、炉渣的碱度、吹氧强度对终点渣中FeO含量的影响,并对吹氧制度、造渣制度进行了优化。工业应用表明：石灰的消耗从每吨铁34. 3kg降到25. 2kg,氧气的消耗从每吨铁48. 2m3降到42. 5m3,终渣中w(FeO)从33. 4%降到25. 1%,终点w［C］从0. 07%提高到0. 15%。     

钒钛烧结矿适宜FeO含量的研究

通过实验室试验研究，分析讨论了ＦｅＯ含量对攀钢钒钛烧结矿产、质量的影响并提出了ＦｅＯ含量的适宜值。     

Effect of Ca(II)‐ion in Wüstite on its Reduction to Iron

Fired compacts of hematite doped with different contents of CaO (mass fractions were 3.5, 4.0, 4.5, 5.0 %) were isothermally reduced to wüstite in a CO‐CO₂ gas mixture at 1173K. It was found from X‐ray diffraction investigation that the lattice parameters of wüstite increased with CaO content dissolved in wüstite crystal. The pure wüstite as well as the wüstite doped with CaO were reduced at different temperature. The results showed that the reductions were promoted with increasing CaO content. The higher the content of CaO dissolved in wüstite crystal was, the larger the lattice parameter and the interplanar distances of wüstite became. This expansion was helpful to the migration of Fe ions and enhanced the reduction. At the early stage, the reduction of pure and doped wüstite compacts was controlled by the interfacial chemical reaction step. At the latter stage, the gaseous diffusion was the rate‐determining step for both sample types.     

Bi_(25)FeO_(40)纳米材料的水热制备及光电性能研究

通过水热法在钛基板上成功制备出了不同形貌的Bi25FeO40纳米材料,使用XRD和FE-SEM对水热反应过程中反应的温度(160~200℃)、矿化剂的种类和浓度对产物结构及形貌的影响进行了研究,并对其生长机理进行分析。测试Bi25FeO40的UV-Vis漫反射光谱,发现其在波长400~600 nm范围内具有良好的可见光响应;采用三电极体系测试材料的光电化学性能,结果显示纳米棒状产物对光电流的响应最快。