| Microstructure Variation of Pellets Containing Ferrous Dust during Carbonation Consolidation | |
| Alternative Title | Microstructure Variation of Pellets Containing Ferrous Dust during Carbonation Consolidation |
| Shi Yan1; Liu Shimeng2; Hu Changqing2; Zhang Yuzhu2 | |
| 2015 | |
| Source Publication | JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
 |
| ISSN | 1006-706X |
| Volume | 22Issue:2Pages:128-134 |
| Abstract | The carbonation and microstructure characteristics of pellets containing ferrous dusts were investigated during carbonation consolidation at different reaction temperatures and CO2 partial pressures. The results indicated that green pellets had loose and network supporting structure with initial strength. and large cracks and pores existed in the pellets. The carbonation reaction was controlled by interfacial chemical reaction at the initial fast stage, which limited diffusion and thus caused the reaction rate to decrease. With increasing reaction temperature and CO2 partial pressure, the conversion rates of CaO and the number of microcrystalline CaCO3 particles increased, and the volume expansion of CaC2O3 led to a decrease in the open porosity. average pore size and specific surface area of the pellets. Micro-pores were occluded, and the number of smaller pores (diameter less than 50 nm) increased, thereby resulting in the more compact and uniform structure of carbonated pellets. Simultaneously, the dense structure prevented CO2 diffusion into the product layer. affecting the increase in carbonation conversion rate. |
| Other Abstract | The carbonation and microstructure characteristics of pellets containing ferrous dusts were investigated during carbonation consolidation at different reaction temperatures and CO_2 partial pressures. The results indicated that green pellets had loose and network supporting structure with initial strength, and large cracks and pores existed in the pellets. The carbonation reaction was controlled by interfacial chemical reaction at the initial fast stage, which limited diffusion and thus caused the reaction rate to decrease. With increasing reaction temperature and CO_2 partial pressure, the conversion rates of CaO and the number of microcrystalline CaCO_3 particles increased, and the volume expansion of CaCO_3 led to a decrease in the open porosity, average pore size and specific surface area of the pellets. Micro-pores were occluded, and the number of smaller pores (diameter less than 50 nm) increased, thereby resulting in the more compact and uniform structure of carbonated pellets. Simultaneously, the dense structure prevented CO_2 diffusion into the product layer, affecting the increase in carbonation conversion rate. |
| Keyword | BASIC OXYGEN STEEL IRON-OXIDE PELLETS HIGH-TEMPERATURE FLUXED PELLETS CO2 SLUDGE SLAG ferrous dust microstructure CaO conversion rate carbonated pellet green pellet |
| Indexed By | CSCD |
| Language | 英语 |
| Funding Project | [National Natural Science Foundation of China] ; [Natural Science Foundation of Hebei Province of China] |
| CSCD ID | CSCD:5370021 |
| Citation statistics |
Cited Times:1[CSCD]
[CSCD Record]
|
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/150026 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.中国科学院金属研究所 2.Hebei United University, Hebei Key Lab Modern Met Technol, Tangshan 063009, Hebei, Peoples R China |
| Recommended Citation GB/T 7714 | Shi Yan,Liu Shimeng,Hu Changqing,et al. Microstructure Variation of Pellets Containing Ferrous Dust during Carbonation Consolidation[J]. JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,2015,22(2):128-134. |
| APA | Shi Yan,Liu Shimeng,Hu Changqing,&Zhang Yuzhu.(2015).Microstructure Variation of Pellets Containing Ferrous Dust during Carbonation Consolidation.JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,22(2),128-134. |
| MLA | Shi Yan,et al."Microstructure Variation of Pellets Containing Ferrous Dust during Carbonation Consolidation".JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL 22.2(2015):128-134. |
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