Fe—S—O熔体中还原出金属铁的分布与分离研究

通过金相分析，研究了在Ｆｅ－Ｓ－Ｏ熔体中用氢气、石墨还原出金属铁在坩埚中的分布，发现还原出的铁与熔体有完全分离的可能。本研究结果为进一步探讨还原金属铁的分离工艺提供了实验依据。     

以电炉还原渣重构转炉钢渣的组成与性能

掺加电炉还原渣重构转炉钢渣的组成和结构制备了高胶凝活性的钢渣。采用化学全分析、XRD、SEM等手段分析了钢渣重构前后的组成、水化产物形貌,并进行了力学性能试验。结果表明:重构钢渣矿物组成以活性硅酸二钙、硅酸三钙和七铝酸十二钙等胶凝矿物为主。当电炉还原渣掺量分别为10%和20%、煅烧温度分别为1 350℃和1 250℃时,重构钢渣水泥的活性指数分别为102.9%和104.0%。掺重构钢渣水泥28 d龄期水化产物与普通硅酸盐水泥的相似,但浆体结构更为致密。     

铜基材料的制备及其光催化还原CO2的实验研究

光催化还原技术可以将CO₂气体转化成高附加值有机物,实现CO₂资源化利用。TiO₂作为常见的光催化材料,具有价格低廉、化学稳定性高等优点。虽其自身的光谱响应范围较窄,且其电子空穴复合率太高,导致其作为光催化材料的催化效率大大降低,但可以通过半导体复合的方式提高其光催化性能。以硫脲和二水氯化铜团制备出硫化亚铜Cu₂S-TiO₂-X,通过高温水热复合到基体上,通过X射线衍射、X射线电子能谱、扫描电镜、紫外光可见光分度计等表征手段研究了其物理特性,并进行了CO₂还原实验。结果表明:Cu₂S-TiO₂-1.0的光催化还原性最强,其CH₄产率为0.12 μmol/(g·h);随着Cu₂S含量的减少,CH₄产率先增加后减少。     

Investigation of Nickel Oxide Used for Alloying in BOF Steelmaking

Direct alloying of nickel oxide in a hot simulator of LD converter was investigated in laboratory.Reduction rate of nickel oxide in steelmaking process was analyzed with the test results. Under the condition oflower slag viscosity, the reduction rate of NiO increases and the [Ni] yield rises. When the slag viscosity is higher, a lot of metal particles with higher Ni content are contained in the slag so as to decrease the [Ni] yield.     

Experimental Crystallization of Synthetic V-bearing Steelmaking Slag with Al2O3 Doped

The phenomenon of crystallization was implemented in the synthetic V-bearing steelwork slag based on the composition of factory slag from the Masted Co., and the possibility of undercooling as a technique to precipitate V-concentration phase was demonstrated. The effect of 20wt% Al2O3 additive introduced into the slag on intensifing the precipitation was also investigated. X-ray diffraction analysis ( XRD ) and scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDX) were used to investigate the slag after heat treatment. It is demonstrated that gehleaite and grossite are the major crystalline phases. Whitlockite with a high content of V2O5 ( called V-concentration phase hereafter) nucleates homogeneously and hetergeneously and grows with decreasing undercooling. At 1548 K, the crystals of V-concentration phase grow up as the duration of time, with a medium grain size of 25μm at 300 rain holding time.     

略钢转炉炼钢"一倒回硫"的试验研究

结合理论与实践分析了影响略钢转炉炼钢“一倒回硫”的因素,找出了回硫原因,并提出了相应对策,灰色系统理论分析表明,影响“一倒回硫”的主要因素是铁水初始含硫量（「Ｓ％」０）和硫的分配系数（Ｌｓ）。在略钢转炉现行生产条件下,硫的分配系数偏低是产生“一倒回硫”的主要原因。故优化炉渣成分,提高转炉冶炼硫的分配系数是避免“一倒回硫”的切实可行途径。     

Thermodynamic Behavior of Manganese and Phosphorus between Liquid Iron and CaO-MgO-SiO2-Al2O3-FetO-MnO-P2O5 Slags

The thermodynamic behavior of manganese and phosphorus between liquid iron and CaO-MgO-SiO2-A12O3-Fe,O- MnO-P2O5 ladle slag system was addressed by investigating the thermodynamic equilibria between liquid iron containing Mn and P and the ladle slag at 1 873 K. The Mn distribution ratio Lmn increases with increasing FetO content and decreasing the basicity (%CaO + %MgO)/ (%SiO2 + %Al2O3 + %P2O5) in slag, while the P distribution ratio Lp seems to be increased as FetO content and the basicity increases. The values of LM, and Lmn decrease by the addition of A12O3 into slag. The expression of the dependence of Lmn. and Lp on the basicity and FetO content in slag was obtained.     

32.5碱矿渣水泥的试验研究与技术分析

阐述了以高炉粒化矿渣为主成分,采用碱性激发剂,研制出一种新型环保节能水泥.这种水泥的技术特征是:水化热低,耐腐蚀性能好,主体材料为工业废渣,可节约能源和减少环境污染.其开发应用有着巨大的综合社会效益.     

CAS-OB中排渣能力与混匀时间实验研究

采用水力模型对宝钢300tCA－OB钢包底吹排渣能力和混匀时间进行了研究。实验结果表明,底吹位置对排渣能力 的影响不大,但对混匀时间有一定的影响。排渣能力与浸渍罩深度和底吹流量有一定的关系,300t钢包的排渣能力与底吹流量、渣层厚度的关系为：Df＝156．15－2．54h 153.7Qreal;混匀时间与底吹流量、底吹位置、漫溃罩深度有关,偏心底吹搅拌效果优于中心底吹。     

CAS-OB钢包底吹排渣能力的实验研究

在CAS－OB工艺中,下罩前底吹排渣面积的大小直接影响钢液处理的可靠性。本文采用水力学模型对300t钢包底吹排渣能力进行了研究,实验结果表明,排渣效果受底吹流量和渣层厚度影响很大,并得出了排渣直径与底吹流量、渣层厚度的关系式。     

Comparative study of LiNiO2,LiNi0.8Co0.2O2and LiNi0.75Al0.25O2 for lithium—ion batteries

The comparative study of LiNi0.8Co0.2O2 and LiNi0.75Al0.25O2 was carried out by X-ray diffraction(XRD) and electrochemical methods.The results show that Co and Al doping suppress the phase transition during charge-discharge.The experiments indicate that LiNi0.75Al0.25O2 has the better cycle-ability and over-charge resistance comparing with LiNi0.8Co0.2O2,The interfacial behavior was studied by use of electrochemical impedance spectroscopy(EIS).The results show that LiNi0.75Al0.25O2 has a slightly larger polarization character than LiNi0.8Co0.2O2.     

锌掺杂氧化镍纳米线的制备及氧化镍基气敏传感器性能的研究

为了提高NiO气敏材料的响应和恢复速度,采用磁场诱导肼还原法和高温氧化法制备Zn掺杂NiO纳米线,研究Zn掺NiO纳米线基传感器对于氨气的敏感性能。结果表明:随着Zn掺杂浓度的提高(摩尔分数2%~5%),XRD衍射峰向小角度偏移0.2°~0.4°, 且晶面间距增大0.01~0.02 nm,均说明锌离子已成功掺入到NiO晶格中;与未掺杂的NiO纳米线传感器相比,掺杂Zn的NiO纳米线传感器的响应速度提升了6~8倍,恢复速度提升了108~120倍;掺杂的NiO基气敏传感器同时拥有着优异的稳定性和选择性。