共查询到20条相似文献,搜索用时 78 毫秒
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为了探析高炉加钛护炉时的钛含量控制,结合钛硅比(w([Ti])/w([Si])),对实际钛分配比的影响因素进行总结。利用炉渣活度、铁水元素活度,分别计算铁水碳和硅还原渣中(TiO2)平衡时的成分,并讨论平衡时钛硅比随铁水温度、炉渣二元碱度、铁水硅含量和铁水硫含量的变化。结果表明,硅还原钛硅比<实际钛硅比<碳还原钛硅比。硅还原理论钛硅比受各项参数的影响较小,碳还原钛硅比受铁水温度和铁水硅含量的影响较大,导致铁水钛含量在高温时有发散现象。因此,护炉时期,需着重关注铁水温度和钛硅比。 相似文献
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世界钛渣研发现状与发展趋势 总被引:2,自引:1,他引:1
对于国内外钛渣的生产,主要从钛渣还原冶炼过程的机理研究,生产中的新工艺、新设备的研发进展,副产品生铁的综合利用、提升产品附加值这3个方面进行了论述,为我国钛渣生产的发展提供了借鉴。 相似文献
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研究了直流电炉作用下渣中TiO2还原的物理化学理现象。认为直流电硅热法冶炼硅钛铁合金时渣中TiO2的还原是通过硅热还原,电解还原,碳热还原,重力沉降,金属液滴电泳沉降及熔池的对流动运达到的。在实验条件下进行了高炉钛矿渣电解,硅热法,直流电硅热法治中炼硅钛铁合金的试验。得到了三种条件下渣中TiO2的还原规律。实验结果表明,直流电硅热法冶炼硅钛铁合金时渣中TiO2的还原速度,还原反应速度常数,合金收得 相似文献
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以攀枝花微细粒级钛精矿为原料 ,云南吕合煤为还原剂 ,采用新型粘结剂、添加剂 ,应用预热球团和回转窑直接还原技术 ,得到的钛精矿金属化球团经破碎、磨矿、磁选后 ,可分离出Ti O2 >74 %的富钛料 相似文献
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介绍了一种高效使用钛渣电炉煤气的方法,为今后钛渣工艺的整体布局提供数据支撑。采用热力学计算方式,得到钛渣电炉产生煤气量与球团金属化率的关系,同时根据实际生产钛精矿预还原球团所需热量的需求,得到钛渣电炉生成煤气热量与实际生产钛精矿预还原球团所需热量之间的关系。结果表明,不同金属化率钛精矿预还原球团用来冶炼钛渣,球团的金属化率无论在什么水平,其生成电炉煤气热量都低于实际球团生产所需热量。若将回收电炉煤气用来生产钛精矿预还原球团需额外增加热源,并且随着球团金属化率升高,补加热量增多。 相似文献
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Pang Xiaotong Xiong Zhihao Liu Shilong Misra Devesh Xiong Zhihui Li Zhuguo 《Metallurgical and Materials Transactions A》2021,52(11):4742-4748
Metallurgical and Materials Transactions A - In this study, microstructural evolution and strengthening of commercial purity Ti (CP-Ti)/Ti–0.4Ni graded material (GM) fabricated by laser... 相似文献
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采用固相法掺杂钛合成了Lil-yTi3FePO4,研究了原料钛的掺杂量、焙烧温度和焙烧时间对锂离子电池正极材料Lil-yTi3FePO4。电化学性能的影响。通过正交实验[L3(3^3)]确定合成橄榄石型Lil-yTi3FePO4的最佳工艺为:掺杂,T1^4+量为1%(摩尔分数),焙烧温度为700℃,焙烧时间为16h。经实验验证,优化后的合成工艺有利于提高锂离子电池正极材料的电化学性能。 相似文献
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Kondakov A. A. Karpov A. V. Grachev V. V. Sytschev A. E. 《Russian Journal of Non-Ferrous Metals》2020,61(2):216-220
Russian Journal of Non-Ferrous Metals - The TiN/TiAl3/Ti2AlN composite material is fabricated in the filtration combustion mode in nitrogen of porous samples made of the TiAl intermetallic powder... 相似文献
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Ti4+掺杂改善锂离子电池正极材料LiFePO4的电化学性能研究 总被引:1,自引:0,他引:1
采用固相法掺杂钛合成了Li1-yTiyFePO4,研究了原料钛的掺杂量、焙烧温度和焙烧时间对锂离子电池正极材料Li1-yTiyFePO4电化学性能的影响.通过正交实验[L9(33)]确定合成橄榄石型Li1-yTiyFePO4的最佳工艺为:掺杂Ti4+量为1%(摩尔分数),焙烧温度为700℃,焙烧时间为16 h.经实验验证,优化后的合成工艺有利于提高锂离子电池正极材料的电化学性能. 相似文献
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S. Saroja M. Vijayalakshmi Baldev Raj 《Transactions of the Indian Institute of Metals》2012,65(2):111-133
It is well known that Ti and Zr based alloys are best suitable for oxidizing environments due to their superior corrosion resistance. This has been exploited in the development of the ternary Ti?CTa?CNb alloy, for the dissolver in a fast reactor fuel reprocessing plant, the efforts of which are summarized in the present overview. Closing of fuel cycle is a priority for the three stage nuclear power program of India, towards which, indigenous development of reprocessing technology and materials is an important milestone. Corrosion resistance of structural materials controls the operating life of the dissolver in a nuclear reprocessing plant, where the spent nuclear fuel is dissolved in highly oxidizing boiling nitric acid. A complete physical metallurgy database of the alloy has been generated to understand the various phase transformations and the resultant microstructures. Corrosion control in different phases of nitric acid is achieved through microstructural optimization and the mechanisms of corrosion are understood using a detailed study of passive oxide film. The dependence of transformation texture on the mode of deformation and the role of severe plastic deformation on mechanical properties have been elucidated. These extensive R&D efforts resulted in a complete understanding of the metallurgy the alloy, which is discussed in this overview. 相似文献
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Induction melting and electron beam melting techniques were employed in the production of unidirectionally solidified eutectic composites of Ti-1.7 wt pct B and Ti-8.5 wt pct Si. The grown eutectics were reinforced by 7.7 volume pct of TiB fibers and 31 volume pct of Ti5Si3 fibers respectively. Controlled dendritic solidification of a hypereutectic composition of Ti-12 wt pct Si was also accomplished. Tensile, compressive, creep, and stress rupture specimens were cut from the eutectic composites and tested with reinforcing fibers parallel to the load axis. Ti?TiB eutectic was found to have less than the critical volume fraction of fibers necessary for reinforcement, while Ti?Ti5Si3 composite attained a compressive yield strength of 275,000 psi and a compressive Young's modulus of 30×108 psi after heat treatment. The 500 and 4000 hr stress rupture properties of Ti?Si eutectic were superior to commercial titanium alloys at 1000° and 1200°F. The minimum creep rate of Ti?Ti5Si3 eutectic composite was lower than all other titanium alloys at 1000°F. Tensile, compressive, and creep properties of the Ti-8.5 wt pct Si eutectic are discussed in terms of the current theories of composite behavior. 相似文献