2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 6: Yagi Intl. Symp. / Metals & Alloys Processing
| Editors: | Kongoli F, Akiyama T, Nogami H, Saito K, Fujibayashi A |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 480 pages |
| ISBN: | 978-1-987820-46-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Oxidation Process of High-chromium Vanadium每bearing Titanomagnetite
Mansheng Chu1; Jue Tang1; Cong Feng2; Feng Li1; Yating TANG1; Zhenggen Liu1;1NORTHEASTERN UNIVERSITY, Shenyang, China; 2, Shenyang, China;
Type of Paper: Regular
Id Paper: 21
Topic: 3
Abstract:
High-chromium vanadium每bearing titanomagnetite containing 0.61wt% Cr2O3 was a special iron ore due to its complex mineral composition and special material characteristic. It was important to clearly know its specific processes including oxidation and reduction for efficiently utilizing it as much as possible. Naturally, this work was focused on the oxidation process of this special iron ore. Based on the fundamental characteristics of high-chromium vanadium每bearing titanomagnetite, the pellet samples were prepared, meanwhile, the effects of roasting temperature and roasting time on the compressive strength of pellet, microstructure of pellet, phase transformation, and oxidation consolidation during oxidation process were investigated systematically. It was shown that the oxidation of high-chromium vanadium每bearing titanomagnetite was not a simple process but a complex one. With the increasing roasting temperature and time, the compressive strength of oxidized pellet was improved and the change rule of compressive strength was described as three sections corresponding to the oxidation consolidation process of high-chromium vanadium每bearing titanomagnetite pellet respectively. The phase transformation during oxidation should be proceeded as follows: Fe3O4 「 Fe2O3; Fe2.75Ti0.25O4 「 Fe9TiO15 + FeTiO3 「 Fe9TiO15 + Fe2Ti3O9; Fe2VO4 「 V2O3 「 (Cr0.15V0.85)2O3; FeCr2O4 「 Cr2O3 「 Cr1.3Fe0.7O3 + (Cr0.15V0.85)2O3. The oxidation consolidation process was divided into three stages: oxidation below 1173 K; recrystallization consolidation at 1173 K‵1373 K; particle refining recrystallization-consolidation by the attending of liquid phase at 1373 K‵1573 K. To obtain the high-chromium vanadium每bearing titanomagnetite oxidized pellet with a good quality, the rational roasting parameters included a roasting temperature of 1573 K and a roasting time of 20 min.
Keywords:
Metallurgy; Oxidation; Pellets; Process; Temperature; Titanium;References:
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