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; 文献标志码:A Preparation and characterization of magnesia powder by direct pyrolysis process of molten magnesium chloride NIU Li-ping1, 2, ZHANG Ting-an1, 2, ZHOU Ai-ping1, 2, Guo-zhi1..., Shenyang 110819, China) Abstract: The molten magnesium chloride, from reduction-distillation process in Kroll method of titanium metallurgy, was used to produce ultra fine magnesia powder under......
红土矿含碳球团还原富集镍铁的工艺研究 石清侠1,邱国兴2 (1.长春黄金研究院,吉林,长春,130012;2.莱钢股份有限公司,山东,莱芜,271104) 摘要:为了解决低品位红土镍矿的合理利用问题,以活性炭粉为还原剂,采用直接还原富集-磁选分离技术,将矿石中的镍和铁直接还原制成金属镍和铁,并通过磁选分离使其得到富集.研究确定了最佳工艺条件为:配炭量4%,还原温度1350 ℃,焙烧时间120 min.此条件下,镍和铁的回收率分别为87.6%和95.3%. 关键词:红土镍矿; 直接还原; 磁选; 镍铁合金; nickel laterite ore; direct reduction; magnetic separation; ferronickel; [全文内容正在添加中] ......
; 文献标志码:A Growth behavior of metal iron grain during direct reduction of low grade hematite ZHU De-qing1, XIAO Yong-zhong1, 2, CHUN Tie-jun1, PAN Jian1 (1... iron grain of low grade hematite during coal based direct reduction was tested using optical microscope and Leica image analysis software. The growth behavior of metal iron grain was investigated using......
is proposed. In order to get better control performance of torque and speed of induction motor, an improved direct torque control method (DTC) is also developed based on the space vector modulation (SVM.... And the torque and stator current ripples of it are reduced significantly compared with using the conventional DTC method. Key words: dynamometer; induction motor; direct torque control (DTC); direct......
Aerodynamic drag reduction of heavy vehicles using append devices by cfd analysisMehrdad khosravi1, Farshid Mosaddeghi2, Majid Oveisi3, Ali khodayari-b4(1. Young Researches and Elite Club, Borujerd..., Iran;4. Department of Mechanical Engineering, Urmia University, Urmia, Iran)Abstract:Improving vehicle fuel consumption, performance and aerodynamic efficiency by drag reduction especially in heavy......
ferric-pseudobrookite phase was found at higher temperature. Direct reduction of oxidized sample-coke cylindrical briquettes was successfully achieved for phase transition from titaniferous magnetite... and air atmospheres. The oxidized pretreated ore is characterized by XRD and SEM. Finally, the direct reduction behaviour of the oxidized ore-coke briquettes is investigated and characterized. 2......
inside ilmenite particle with the beneficiation of metal iron, titanium, and magnesium in the hydrogen reduction process. Unlike the hydrogen direct reduction, the dense layer can not form... that the utilization of hydrogen can be elevated. Key words: ilmenite; magnesium; hydrogen-rich gas; direct reduction; coupling reaction 我国攀西地区的钛铁矿属于典型的岩矿型矿物[1-2],风化程度低,结构致密,难于还原.目前,使用的电炉熔炼-浓硫酸浸出流程三废量大......
Upgrading and dephosphorization of Western Australian iron ore using reduction roasting by adding sodium carbonateDe-qing Zhu1,Tie-jun Chun1,Jian Pan1,Li-ming Lu2,Zhen He11. School of Minerals Processing and Bioengineering, Central South University2. Commonwealth Scientific and Industrial Research Organisation (CSIRO)摘 要:The technology of direct......
Trans. Nonferrous Met. Soc. China 31(2021) 1818-1827 Direct carbothermic reduction of ilmenite concentrates by adding high dosage of Na2CO3 in microwave field Zhi-gang YU1,2,3, Jing-wu XIAO1,2,3, Hai... and efficient route for the utilization of ilmenite concentrates was proposed by direct carbothermic reduction in microwave field. High dosage of Na2CO3, which can be recycled, was added to accelerate......
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