CaO—SiO2—Al2O3—MgO—TiO2—FeO渣系熔融还原过程中TiC的生成机理

在实验室条件下，测定了熔融还原过程中ＣａＯ－ＳｉＯ２－Ａｌ２Ｏ３－ＭｇＯ－ＴｉＯ２－ＦｅＯ系炉渣组成以及不同供碳对ＴｉＣ生成的影响，并进行了热力学分析。研究结果表明：ＴｉＣ的生成机理与工艺条件密切相关。     

氧化镧碳化行为的研究

用ＸＲＤ法对氧化镧与石墨粉在不同温度条件下反应产物的物相组成进行了鉴定，探讨了Ｌａ２Ｏ３与Ｃ作用生成稀土碳化物的反应历程。实验结果表明，在本实验条件下，Ｃ还原Ｌａ２Ｏ３要经历Ｌａ２Ｏ３→ＬａＣＯ→Ｌａ２Ｃ２Ｏ２→ＬａＣ３等反应阶段。同时，体系中ＣＯ分压的大小对反应产物的物相组成有较大的影响。     

CaO—SiO2—Al2O—MgO—TiO2—V2O5渣系熔融还原过程中钛对钒还原影响的研究

在实验室条件下，模拟铁浴法熔融还原过程，探讨了在ＣａＯ－ＳｉＯ２－Ａｌ２Ｏ３－ＭｇＯ－ＴｉＯ２－Ｖ２Ｏ５渣系与碳饱和熔铁之间Ｖ－Ｔｉ的耦全反应，以及在不同条件下钛对钒还原的影响。     

CaO－Sio_2－Al_2O_3－MgO－TiO_2－V_2O_5渣系熔融还

在实验室条件下，模拟铁浴法熔融还原过程，探讨了在ＣａＯ－ＳｉＯ＿２－Ａｌ＿２Ｏ＿３－ＭｇＯ－ＴｉＯ＿２－Ｖ＿２Ｏ＿５渣系与碳饱和熔铁之间Ｖ－Ｔｉ的耦合反应，以及在不同条件下钛对钒还原的影响。     

复合金属氧化物脱硫剂还原法再生机理

利用热天平测试了ＣＯ、Ｈ２还原饱和硫剂微孔内Ｆｅ２（ＳＯ４）３的起始反应温度及还原速率，用Ｘ射线衍射法分析了反应中间产物及最终产物，实验结果表明，脱硫剂还原法再生的反应温度较传统热分解法低约２００℃、ＣＯ作再生脱硫剂的还原气体优于Ｈ２，ＣＯ不充剂内Ｆｅ２（ＳＯ４）３的反应级数为０．８７，活化能为１４２．９ｋＪ／ｍｏｌ。 ?     

CaO—SiO2—Al2O3—MgO—TiO2渣系熔副还原过程中钛还原行为的研究

在实验室条件下，探讨了铁浴法熔融还原过程中，在ＣａＯ－ＳｉＯ２－Ａｌ２Ｏ３－ＭｇＯ－ＴｉＯ２渣系与碳饱和熔铁间钛的还原行为，以及渣中ＴｉＯ２含量，熔渣碱度（ＣａＯ／ＳｉＯ２），还原温度，铁浴量等因素对钛还原的影响。     

钛硅铁合金生产中金属元素与渣氧化物的反应和平衡

描述了在钛硅铁合金生产中Ｓｉ－Ｔｉ－Ｆｅ合金系和ＴｉＯ２－ＣａＯ－ＳｉＯ２－Ａｌ２Ｏ３渣系间的反应以及金属元素和渣系氧化物的化学平衡。攀钢高炉渣，硅铁和石灰按一定比例混合均匀，加入直流电炉中，在熔态条件下发生反应，得到钛硅铁合金和还原低钛渣。试验表明，在反应开始后４０ｍｉｎ反应可达到平衡；加入石磁可以提高渣的碱度；合金中高硅含量有利于钛回收率的提高。     

添加剂对Cr2O3—Al系SHS反应的影响

研究了添加ＣｒＯ３－Ａｌ、Ｆｅ２Ｏ３－Ａｌ＋ＭｇＯ及Ｔｉ－Ｃ的Ｃｒ２Ｏ３－Ａｌ系的燃烧特性。实验发现，添加ＣｒＯ３－Ａｌ、Ｆｅ２Ｏ３－Ａｌ＋ＭｇＯ时，自蔓燃反应易于引发；体系中混入Ｔｉ－Ｃ添加剂对反应引发不利，但在用纯Ｔｉ－Ｃ作引火剂情况下可以引发。随着ＣｒＯ３－Ａｌ添加量的增加，燃烧温度升高，但添加量大于２０％时，燃烧温度反而下降。燃烧温度随Ｆｅ２Ｏ３－Ａｌ＋ＭｇＯ添加量的增加而升高。Ｔｉ－Ｃ添加量的增大对燃烧温度影响不大。燃烧速度随以上添加剂量的增大而增大     

水热合成技术的研究和应用：VI.钛酸钙电子陶瓷晶体粉末的制备研究

采用水热法合成ＣａＴｉＯ３电子陶瓷晶体粉末，以Ｃａ（ＯＨ）２和Ｔｉ（ＯＨ）２为水热合成前驱物，制备前驱物的原料选用Ｃａ（ＮＯ３）２或ＣａＯ及ＴｉＣｌ４水热体系的ＫＯＨ浓度为０．１～１．６ｍｏｌ／Ｌ，水热温度为１５０～２００℃，时间２０～６０ｍｉｎ实验结果表明在各自实验范围均能效合成ＣａＴｉＯ３推荐合成条件为１７５℃，３０ｍｉｎ，水热体系ＫＯＨ浓度０．２ｍｏｌ／Ｌ，文中对合成机理进行初步探讨。     

Cu—C—Ti系和Cu—CuO—Al系合金粉末的机构合金化

将Ｃｕ－Ｃ３．３％－Ｔｉ１３．３％和Ｃｕ－ＣｕＯ２．５％－Ａｌ１．１％二合金粉末分别进行机械合金化，结果发现，经２０ｈ球磨后，Ｃ的衍射峰已经消失，Ｔｉ，Ａｌ，ＣｕＯ的衍射峰强度显著降低；６０ｈ球磨后，二合金粉末都形成了Ｃｕ基过饱和固溶体；１００ｈ球磨后，部分Ｔｉ，Ｃ，Ａｌ，Ｏ溶质元素脱溶析出，并反应生成ＴｉＣ和Ａｌ２Ｏ３。     

CFD Simulation of the Carbon Dust Combustion in the COREX® Melter Gasifier

Several approaches were chosen to simulate the combustion of carbon particles recycled in the melter gasifier of the COREX plant via a dust burner. Reaction rates from different literature sources were analysed to develop a functional reaction set for the carbon combustion. These models were tested in a 180° sector of the burner domain and were compared among each other. The results were transferred into a full 3D model of the dome region in the melter gasifier.     

一种测量塑料橡胶类材料声衰减的脉冲回波方法

利用两次脉冲回波试验中测量的延迟块自由底面回波、延迟块/测试样品界面回波以及橡胶试样底面回波共3个信号的傅立叶变换幅度谱,能够求取试样在一定频率范围内的声衰减值。与国标GB/T18022-2000中的方法相比,该方法具有装置简单、操作便捷的特点,并且能够用于测试试样的横波衰减。     

国产大型热连轧机主传动交流调速系统

随着电力电子技术和矢量控制技术的发展,在工业产特别是在冶金行业中,交交流频同步电机矢量控制系统已经成为大型轧机主传动发展的必然趋势,结合攀钢１４５０热连轧主传动改造工程,对交流变频调速系统的原理,构成及调速性能指标等方面进行了分析与阐述。     

对溴苯甲醚的合成研究

对溴苯甲醚是合成许多有机化合物的重要中间体，本文探讨了反应条件，试剂用量以及改进的两条合成路线对合成对溴苯甲醚产率的影响，经改进的合成方法反应条件温和、操作简便、产率更高。     

铁帽型金矿石制粒堆浸提金工艺的探讨

以一铁帽型金矿石的堆浸生产实践为例，结合其矿石性质，分析了铁帽型金矿石堆浸的可行, 探讨了堆浸时制粒与否，pH值，药剂制度和浸出时间等浸出因素对浸出效果的影响，以优化生产条件，生产实践表明，对于这类氧化程度高，含泥多的低品位铁帽型金矿石，采用制粒堆浸工艺，可以获得较好的技术指标，金浸出率达到77％。     

Luminescence investigation of Eu~（3＋）-Bi~（3＋） co-doped CaMoO_4 phosphor

A series of Eu³⁺-Bi³⁺ co-doped CaMoO₄ red phosphors were synthesized via the solid-sate reaction method. The crystal structures of the obtained samples were identified by X-ray powder diffraction (XRD). The photoluminescence property was investigated, and the results showed that the intensity of excitation spectra and emission spectra could be changed with different doping ratios of Bi³⁺/Eu³⁺. The proposed explanation of these changes was from the energy transfer between Bi³⁺ and Eu³⁺ and the unbalanced charge from the substitution of Eu³⁺ and Bi³⁺ for Ca²⁺ in CaMoO₄. The obtained samples are a promising red light emitting phosphor for the needs of different excitation sources with near-UV and blue GaN-based chips.     

Victim and offender accounts of interpersonal conflict: Autobiographical narratives of forgiveness and unforgiveness.

Participants wrote 2 narratives that described an incident in which they angered or hurt someone (offender) or in which someone angered or hurt them (victim) and the offense was forgiven or not forgiven. Victims portrayed the offense as continuing (open), and offenders portrayed the offense as over (closed). Forgiveness narratives portrayed offenses as closed and with positive outcomes; however, for some victims, forgiveness coincided with continued anger, suggesting incomplete forgiveness. Dispositional empathy was associated with more benign interpretations of offenses, and situational empathy (e.g., for the offender) was associated with victims' forgiveness. In contrast, offenders' empathy for victims was associated with less self-forgiveness. Thus, both victim or offender role and forgiveness must be considered to understand narratives of interpersonal offenses. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of Calcium and Chloride Ions in Iron Ore Reverse Cationic Flotation: Fundamental Studies

ABSTRACT

In this work, the simultaneous effects of Ca²⁺ and Cl^? ions in an aqueous solution at pH 10.5 on the flotation of quartz (the main impurity in itabiritic iron ore) and hematite by starch and amine was investigated. A strong depression in the flotation of both quartz and hematite conditioned with CaCl₂ was observed. This effect was higher for hematite than for quartz. Based on zeta potential measurements and the speciation diagram of calcium in aqueous solutions, the physical adsorption of Ca²⁺ on the surfaces of both minerals was inferred. The infrared spectrum of quartz conditioned with CaCl₂ at pH 10.5 was similar to its reagent-free reference spectrum. However, a new band at the wavenumber of 1465 cm^?1 was identified in the spectrum of hematite conditioned with CaCl₂; this band did not exist in its reference spectrum. This new band may indicate the chemical adsorption of Cl^? ions on the hematite surface. The complexation of Ca²⁺ by ethylenediaminetetraacetic acid enabled complete quartz recovery with amine. For hematite, recovery was partially restored, probably because of the positive chloro-complexes on the hydrated iron surfaces of hematite, which prevented the adsorption of aminium ions at these sites. Therefore, the selective inverse cationic flotation of itabiritic iron ore at pH 10.5 in water containing Ca²⁺ is possibly only after complexing them with EDTA.     

转炉煤气输送管道腐蚀原因分析

本文主要从实验角度出发，分析了首钢转炉煤气输送管道腐蚀的原因，并根据实际情况提出具体的防腐蚀建议。     

连铸过程采用电磁搅拌时的负偏析带的形成机理

连铸过程中采用电磁搅拌可以产生积极的冶金效果,但同时又伴有严重的负偏析带(白亮带)的产生。本文在实验室及工业试验的基础上对“白亮带”的形成机理及影响因素进行了较为系统的研究,得出如下结论:凝固速度的变化不是形成“白亮带”的主要原因,“白亮带”主要是由于强制流动的钢液对凝固前沿的冲刷所致。