Non-isothermal reduction mechanism and kinetics of high chromium vanadium–titanium magnetite pellets

2014 ◽  
Vol 42 (1) ◽  
pp. 17-26 ◽  
Author(s):  
G-J. Cheng ◽  
J-X. Liu ◽  
Z-G. Liu ◽  
M-S. Chu ◽  
X-X. Xue
Keyword(s):  
Reduction Mechanism ◽  
High Chromium ◽  
Isothermal Reduction ◽  
Magnetite Pellets ◽  
Mechanism And Kinetics ◽  
Vanadium Titanium ◽  
Kinetics Of ◽  
Titanium Magnetite

The isothermal reduction kinetics of chromium-bearing vanadium–titanium magnetite sinter

2018 ◽  
Vol 58 (2) ◽  
pp. 177-186
Author(s):  
Xudong Gao ◽  
Jinsheng Wang ◽  
Wei Lv ◽  
Junyi Xiang ◽  
Xuewei Lv
Keyword(s):  
Reduction Kinetics ◽  
Isothermal Reduction ◽  
Vanadium Titanium ◽  
Kinetics Of ◽  
Titanium Magnetite

scholarly journals Effect of Cr2O3 on the Reduction and Smelting Mechanism of High-Chromium Vanadium-titanium Magnetite Pellets

2016 ◽  
Vol 56 (11) ◽  
pp. 1938-1947 ◽  
Author(s):  
Gong-jin Cheng ◽  
Xiang-xin Xue ◽  
Zi-xian Gao ◽  
Tao Jiang ◽  
He Yang ◽  
...  
Keyword(s):  
High Chromium ◽  
Magnetite Pellets ◽  
Vanadium Titanium ◽  
Titanium Magnetite

scholarly journals Coal-Based Reduction and Magnetic Separation Behavior of Low-Grade Vanadium-Titanium Magnetite Pellets

Minerals ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 86 ◽  
Author(s):  
Gongjin Cheng ◽  
Zixian Gao ◽  
Mengyang Lv ◽  
He Yang ◽  
Xiangxin Xue
Keyword(s):  
Magnetic Separation ◽  
Low Grade ◽  
Magnetite Pellets ◽  
Vanadium Titanium ◽  
Separation Behavior ◽  
Titanium Magnetite

Phases Transition and Consolidation Mechanism of High Chromium Vanadium-Titanium Magnetite Pellet by Oxidation Process

2016 ◽  
Vol 35 (7) ◽  
pp. 729-738
Author(s):  
Jue Tang ◽  
Man-sheng Chu ◽  
Cong Feng ◽  
Feng Li ◽  
Zheng-gen Liu
Keyword(s):  
Phase Transition ◽  
Oxidation Process ◽  
Consolidation Process ◽  
High Chromium ◽  
Oxidized Pellet ◽  
Three Stages ◽  
Roasting Temperature ◽  
Vanadium Titanium ◽  
Roasting Time ◽  
Titanium Magnetite

AbstractBased on the fundamental characteristics of high chromium vanadium-titanium magnetite (HCVTM), the effects of roasting temperature and roasting time on the phase transition and oxidation consolidation during the oxidation were investigated systematically. It was shown that the oxidation of HCVTM pellet was not a simple process but complex. With increasing roasting temperature and time, the compressive strength of oxidized pellet was improved. The phase transition during oxidation was hypothesized to proceed as follows: (1) Fe3O4 → Fe2O3; (2) Fe2.75Ti0.25O4 → Fe9TiO15 + FeTiO3 → Fe9TiO15 + Fe2Ti3O9; (3) Fe2VO4 → V2O3 → (Cr0.15V0.85)2O3; (4) FeCr2O4 → Cr2O3 → Cr1.3Fe0.7O3 + (Cr0.15V0.85)2O3. The oxidation consolidation process was divided into three stages: (1)oxidation below 1,173 K; (2) recrystallization consolidation at 1,173 – 1,373 K; (3) particle refining recrystallization-consolidation by the participation of liquid phase at 1,373 – 1,573 K. To obtain the HCVTM oxidized pellet with good quality, the rational roasting parameters included a roasting temperature of 1,573 K and a roasting time of 20 min.

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