Simulation of Fluidization Quality for Various Reduced−Gas Composition and Agitation Speed Circumstances in a Gas-Solid Fluidized Bed with an Inclined Agitator
Blast furnace ironmaking is one of the most serious carbon dioxide emission processes. To reduce energy consumption and CO<sub>2</sub> emissions, fluidized bed ironmaking technology with hydrogen as a reducing agent has attracted more and more attention. An inclined agitator was added to...
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MDPI AG
2023-02-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/2/376 |
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| author | Chuanfu Li Yan Liu Yuelong Wu Xiaolong Li Tingan Zhang |
| author_facet | Chuanfu Li Yan Liu Yuelong Wu Xiaolong Li Tingan Zhang |
| author_sort | Chuanfu Li |
| collection | DOAJ |
| description | Blast furnace ironmaking is one of the most serious carbon dioxide emission processes. To reduce energy consumption and CO<sub>2</sub> emissions, fluidized bed ironmaking technology with hydrogen as a reducing agent has attracted more and more attention. An inclined agitator was added to the fluidized bed reactor to address the sticking issue in the conventional fluidized bed ironmaking process. In this research, numerical simulation was used to examine the impacts of reducing gas composition and agitation speed on the gas-solid fluidization quality in the cold fluidization of iron ore powder in the fluidized bed with an inclined agitator. The results indicate that the fluidization effect of iron ore powder is better when the volume ratios of H<sub>2</sub> to CO and H<sub>2</sub> to N<sub>2</sub> are 1:1. Under the intensive shear action of the agitator, the standard deviation of pressure drop constantly decreases with the increase in agitation speed, and the decreasing range is smaller and smaller. The fluidization state of the iron ore powder particles in the bed stabilized when the agitation speed reached 160 rpm. |
| first_indexed | 2024-03-11T08:25:12Z |
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| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-11T08:25:12Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-730fbaf3ce9847369ad0dd2414e902ca2023-11-16T22:08:27ZengMDPI AGMetals2075-47012023-02-0113237610.3390/met13020376Simulation of Fluidization Quality for Various Reduced−Gas Composition and Agitation Speed Circumstances in a Gas-Solid Fluidized Bed with an Inclined AgitatorChuanfu Li0Yan Liu1Yuelong Wu2Xiaolong Li3Tingan Zhang4Key Laboratory of Ecological Metallurgy of Multi−Metal Intergrown Ores of Ministry of Education, School of Metallurgy, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Ecological Metallurgy of Multi−Metal Intergrown Ores of Ministry of Education, School of Metallurgy, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Ecological Metallurgy of Multi−Metal Intergrown Ores of Ministry of Education, School of Metallurgy, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Ecological Metallurgy of Multi−Metal Intergrown Ores of Ministry of Education, School of Metallurgy, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Ecological Metallurgy of Multi−Metal Intergrown Ores of Ministry of Education, School of Metallurgy, Northeastern University, Shenyang 110819, ChinaBlast furnace ironmaking is one of the most serious carbon dioxide emission processes. To reduce energy consumption and CO<sub>2</sub> emissions, fluidized bed ironmaking technology with hydrogen as a reducing agent has attracted more and more attention. An inclined agitator was added to the fluidized bed reactor to address the sticking issue in the conventional fluidized bed ironmaking process. In this research, numerical simulation was used to examine the impacts of reducing gas composition and agitation speed on the gas-solid fluidization quality in the cold fluidization of iron ore powder in the fluidized bed with an inclined agitator. The results indicate that the fluidization effect of iron ore powder is better when the volume ratios of H<sub>2</sub> to CO and H<sub>2</sub> to N<sub>2</sub> are 1:1. Under the intensive shear action of the agitator, the standard deviation of pressure drop constantly decreases with the increase in agitation speed, and the decreasing range is smaller and smaller. The fluidization state of the iron ore powder particles in the bed stabilized when the agitation speed reached 160 rpm.https://www.mdpi.com/2075-4701/13/2/376fluidized bedgas compositioninclined agitationagitation speedpressure characteristic |
| spellingShingle | Chuanfu Li Yan Liu Yuelong Wu Xiaolong Li Tingan Zhang Simulation of Fluidization Quality for Various Reduced−Gas Composition and Agitation Speed Circumstances in a Gas-Solid Fluidized Bed with an Inclined Agitator Metals fluidized bed gas composition inclined agitation agitation speed pressure characteristic |
| title | Simulation of Fluidization Quality for Various Reduced−Gas Composition and Agitation Speed Circumstances in a Gas-Solid Fluidized Bed with an Inclined Agitator |
| title_full | Simulation of Fluidization Quality for Various Reduced−Gas Composition and Agitation Speed Circumstances in a Gas-Solid Fluidized Bed with an Inclined Agitator |
| title_fullStr | Simulation of Fluidization Quality for Various Reduced−Gas Composition and Agitation Speed Circumstances in a Gas-Solid Fluidized Bed with an Inclined Agitator |
| title_full_unstemmed | Simulation of Fluidization Quality for Various Reduced−Gas Composition and Agitation Speed Circumstances in a Gas-Solid Fluidized Bed with an Inclined Agitator |
| title_short | Simulation of Fluidization Quality for Various Reduced−Gas Composition and Agitation Speed Circumstances in a Gas-Solid Fluidized Bed with an Inclined Agitator |
| title_sort | simulation of fluidization quality for various reduced gas composition and agitation speed circumstances in a gas solid fluidized bed with an inclined agitator |
| topic | fluidized bed gas composition inclined agitation agitation speed pressure characteristic |
| url | https://www.mdpi.com/2075-4701/13/2/376 |
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