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Phase transformation and reduction kinetics during the hydrogen reduction of ilmenite concentrateXin-guo Si 1,2),Xiong-gang Lu 1),Chuan-wei Li 1),Chong-he Li 1),and Wei-zhong Ding 1) 1) Shanghai Key... of the grain to its interior.The kinetics of reduction indicates that the rate-controlling step is diffusion process control with the activation energy of 89 kJ·mol-1.关键词:......
; (1 000 ℃) may unfavorably slow the reduction rate. From the kinetics analysis at 950 ℃, the most part of reduction course is likely controlled by interfacial chemical reaction mechanism... in reduction course is the 3rd stage (FeO→Fe), and the utilization of reducing gas increases with the rise of H2 proportion. Key words: iron ore pellets; coal gas; gas-based direct reduction; reduction kinetics......
J. Cent. South Univ. (2021) 28: 2037-2051 DOI: https://doi.org/10.1007/s11771-021-4751-5 Bioleaching and dissolution kinetics of pyrite, chalcocite and covellite SHANG He(尚鹤)1, 2, 3, 4, GAO Wen.... The leaching kinetics of the pyrite, chalcocite and covellite under the studied conditions was successfully modeled by an empirical diffusion-like equation, respectively. The apparent activity energy......
): 72-74. [10]PENG Bing, Lobel J, Kozinski J A, et al. Non-isothermal reduction kinetics of EAF dust -based pellets [J]. CIM Bulletion, 2001, 94(1049): 64-70. [11]Lobel J, PENG Bing, Kozinski J A, et al... and Steelmaking, 1997, 24(5): 386-391. [15]Goswami M C, Prakash S, Sarkar S B. Kinetics of smelting reduction of fluxed composite iron and pellets [J]. Steel Research, 1999, 70(2): 41-46. [16]CHNEG......
Staged reaction kinetics and characteristics of iron oxide direct reduction by carbonRu-fei Wei1,2,Da-qiang Cang1,2,Ling-ling Zhang3,Yuan-yuan Bai41. School of Metallurgical and Ecological... reduction kinetics and characteristics of iron oxide direct reduction by carbon were studied in this work. The characteristics were investigated by simultaneous thermogravimetric analysis, X-ray......
Migration behaviors and kinetics of phosphorus during coal-based reduction of high-phosphorus oolitic iron oreYong-sheng Sun,Yan-feng Li,Yue-xin Han,Yan-jun LiSchool of Resources and Civil... and temperature, while that of the slag phase gradually decreased.The P diffusion constant and activation energy were determined and a migration kinetics model of P in coal-based reduction......
on reduction ratio of pellet Fig. 5 Profile of reduced pellets under reducing gas with different hydrogen contents Diffusion coefficient of hydrogen is high and its reduction kinetics condition is good...: 1179-1184. [8] DANG Jie, CHOU K, HU Xiao-jun, ZHANG Guo-hua. Reduction kinetics of metal oxides by hydrogen [J]. Steel Research International, 2013, 84(6): 526-533. [9] KEMPPAINEN A, ALATARVAS T, ILJANA M......
Pyrolysis and combustion kinetics of lycopodium particles in thermogravimetric analysisSeyed Alireza Mostafavi1, Sadjad Salavati2, Hossein Beidaghy Dizaji2, Mehdi Bidabadi2(1. Department... in the nitrogen environment indicates that the maximum of particle mass reduction occurs in the temperature range of 250-550 °C where the maximum mass reduction in the DTG diagrams also occurs in. In the oxygen......
J. Cent. South Univ. (2016) 23: 44-51 DOI: 10.1007/s11771-016-3047-7 Numerical simulation of chemical vapor deposition reaction in polysilicon reduction furnace XIA Xiao-xia(夏小霞)1, 2, WANG Zhi-qi(王志... Central South University Press and Springer-Verlag Berlin Heidelberg 2016 Abstract: Three-dimensional model of chemical vapor deposition reaction in polysilicon reduction furnace was established......
Fluidized roasting reduction kinetics of low-grade pyrolusite coupling with pretreatment of stone coalYa-li Feng1,Zhen-lei Cai1,Hao-ran Li2,Zhu-wei Du2,Xin-wei Liu11. School of Civil..." name="ChDivSummary">Based on the fluidized roasting reduction technology of low-grade pyrolusite coupling with pretreatment of stone coal, the manganese reduction efficiency was investigated......