|
|
|
| Characteristics of Calcined Magnesite and Its Application in Oxidized Pellet Production |
| Qiang-jian GAO,Guo WEI,Xin JIANG,Hai-yan ZHENG,Feng-man SHEN |
| School of Materials and Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China |
|
|
|
|
Abstract Calcined magnesite is a binding additive and an MgO-bearing flux for pellets production. The effects of calcination temperature and time on the characteristics of calcined magnesite were investigated. Experimental results indicated that the best calcination condition was 850 �� and 1 h. Under this condition, the hydration activity of the calcined magnesite was 80. 56%, and the average diameter of crystal grain D, specific surface area S and the medium particle size D50 were 25. 4 nm, 45. 40 m2/g and 3. 41 ��m, respectively. This kind of calcined magnesite was a good binding additive for pellets production. At the same proportion of calcined magnesite, the effects of activities of calcined magnesite on metallurgical properties of green pellet and indurated pellet showed that calcined magnesite with high activity could improve the dropping strength and compressive strength of green pellet and enhance the burst temperature of green pellet; however, the effects of activity on compressive strength, low-temperature reduction degradation index, reduction swelling index and reduction index of indurated pellet were not obvious.
|
|
Received: 26 November 2012
Published: 15 April 2014
|
|
Corresponding Authors:
Qiang-Jian GAO
E-mail: gaoqiangjian@163.com
|
|
|
|
| [1] |
Feng Chen,Yu-feng Guo*,Tao Jiang,Fu-qiang Zheng,Shuai Wang,Ling-zhi Yang. Effects of high pressure roller grinding on size distribution of vanadium-titanium magnetite concentrate particles and improvement of green pellet strength[J]. Chinese Journal of Iron and Steel, 2017, 24(3): 266-272. |
| [2] |
Wei Li,Gui-qin Fu,Man-sheng Chu,Miao-yong Zhu*. Reduction behavior and mechanism of Hongge vanadium titanomagnetite pellets by gas mixture of H2 and CO[J]. Chinese Journal of Iron and Steel, 2017, 24(1): 34-42. |
| [3] |
Cong��cong YANG,De��qing ZHU,Jian PAN,Bin��zhi ZHOU,Hu XUN. Oxidation and Induration Characteristics of Pellets Made from Western Australian Ultrafine Magnetite Concentrates and Its Utilization Strategy[J]. Chinese Journal of Iron and Steel, 2016, 23(9): 924-932. |
| [4] |
En-hui WU,,Rong ZHU,Shao-li YANG,Lan MA,Jun LI,Jing HOU. Influences of Technological Parameters on Smelting-separation Process for Metallized Pellets of Vanadium-bearing Titanomagnetite Concentrates[J]. Chinese Journal of Iron and Steel, 2016, 23(7): 655-660. |
| [5] |
Gui-ming YANG,Xiao-hui FAN,Xu-ling CHEN,Xiao-xian HUANG,Zong-ping LI. Intelligent Control of Grate-kiln-cooler Process of Iron Ore Pellets Using a Combination of Expert System Approach and Takagi-Sugeno Fuzzy Model[J]. Chinese Journal of Iron and Steel, 2016, 23(5): 434-441. |
| [6] |
Wei WU,Jian-jun GAO,Jia-qing ZENG,Yuan-hong QI,Jian-chang WANG,Xi-dong ZHANG. Reduction of Carbon-bearing Pellets of Oolitic Hematite in a Shaft Furnace[J]. Chinese Journal of Iron and Steel, 2016, 23(3): 210-219. |
|
|
|
|
2014, Vol. 21 
