|
|
|
| Effect of Adding CaO on Combustion Mechanism of Pulverized Coal Injection in BF |
| FENG Shuai1,L Qing1,LIU Xiao-jie2,BI Si-you3,LIU Ran1,DU Lin-sen3 |
1. College of Metallurgy and Energy, Hebei Key Laboratory for Advanced Metallurgy Technology, Hebei United University, Tangshan 063009, Hebei, China
2. School of Materials and Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
3. Ironmaking Department, Handan Iron and Steel Co., Ltd., Hebei Iron and Steel Group, Handan 056000, Hebei, China |
|
|
|
|
Abstract CaO is a kind of pulverized coal combustion improver which is suited for the blast furnace. It is adsorbing volatile, making fixed carbon overheat at local regions and increasing carbon activity, in this way, pulverized coal can take fire at lower temperature by DTA and TG curves analysis. Collecting unburned coal through simulating combustion conditions of blast furnace, analyzing XRD, IR spectrum and SEM, the microcrystalline parameters of unburned coal increased, the height and diameter of aromatic slices will increase 0.0024nm and 0.0362nm respectively as CaO joined.The absorption peak of unburned coal powder adding CaO is more obviously than raw coal in 1500cm-1 and 3400cm-1. The particles size of unburned coal powder reduced 2.67μm by adding CaO, the morphological appearance become irregular.
|
|
Received: 04 September 2012
Published: 18 June 2013
|
|
|
|
| [1] |
LI Yan-jiang,L Qing,BAI Rui-guo,LIU Ran,LI Hong-wei. Combustion-supporting mechanisms of CeO2 for blast furnace pulverized coal injection[J]. Chinese Journal of Iron and Steel, 2016, 28(7): 8-12. |
| [2] |
FENG Shuai,L Qing,SUN Yan-qin,WU Wei-nan,WANG Rui-zhe,BI Si-you. Combustion Mechanism of Blast Furnace Coal Injection Adding KMnO4[J]. Chinese Journal of Iron and Steel, 2013, 25(9): 11-15. |
|
|
|
|
2013, Vol. 48 
