Study on Double-Layer Ignition Sintering Process Based on Autocatalytic Denitrification of Sintering Layer
An efficient sintering process was proposed based on the autocatalytic denitrification of the sintered ore. The catalytic denitrification of sintered ore, the effect of double-layer ignition sintering process on the emission reduction in nitrogen oxides, and the impact on the quality of sintered ore...
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| Format: | Article |
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MDPI AG
2021-12-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/12/1/33 |
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| author | Benjing Shi Junying Wan Tiejun Chen Xianlin Zhou Yanhong Luo Jiawen Liu Mengjie Hu Zhaocai Wang |
| author_facet | Benjing Shi Junying Wan Tiejun Chen Xianlin Zhou Yanhong Luo Jiawen Liu Mengjie Hu Zhaocai Wang |
| author_sort | Benjing Shi |
| collection | DOAJ |
| description | An efficient sintering process was proposed based on the autocatalytic denitrification of the sintered ore. The catalytic denitrification of sintered ore, the effect of double-layer ignition sintering process on the emission reduction in nitrogen oxides, and the impact on the quality of sintered ore were studied. The results showed that the catalyzed reduction of NO with sinter ore as a catalyst has a significant effect; when the airspeed reaches 3000 h<sup>−1</sup>, the temperature is 500 °C, and the conversion rate of NO can reach 99.58%. The sinter yield of double-layer ignition sintering is increased, solid fuel consumption is slightly reduced, falling strength is slightly increased, and drum strength is slightly decreased. Under the conditions of layer height proportion of 320/400 mm (lower/upper) and ignition time interval of 10 min, the yield, drum strength, shatter strength, and solid fuel consumption reached 61.60%, 54.82%, 46.75%, and 69.55%, respectively. NO<sub>x</sub> concentration under the 16% baseline oxygen content (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi>c</mi><mrow><mo stretchy="false">(</mo><mi>N</mi><msub><mi>O</mi><mrow><mi>x</mi><mo stretchy="false">)</mo></mrow></msub></mrow><mo>’</mo></msubsup></mrow></semantics></math></inline-formula>) in the flue gas of double-layer ignition sintering is reduced to a certain extent, and the generation time of NO<sub>x</sub> is greatly shortened. The double-layer ignition sintering process can reduce the emission of nitrogen oxides in the sintering process under the condition of guaranteeing the quality of sinter, which has great economic and environmental benefits. |
| first_indexed | 2024-03-10T00:51:38Z |
| format | Article |
| id | doaj.art-29d8351ddb154065864fb2e2c9758098 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T00:51:38Z |
| publishDate | 2021-12-01 |
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| series | Minerals |
| spelling | doaj.art-29d8351ddb154065864fb2e2c97580982023-11-23T14:49:14ZengMDPI AGMinerals2075-163X2021-12-011213310.3390/min12010033Study on Double-Layer Ignition Sintering Process Based on Autocatalytic Denitrification of Sintering LayerBenjing Shi0Junying Wan1Tiejun Chen2Xianlin Zhou3Yanhong Luo4Jiawen Liu5Mengjie Hu6Zhaocai Wang7Zhongye Changtian International Engineering Co., Ltd., Changsha 410205, ChinaSchool of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaSchool of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaSchool of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaSchool of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaSchool of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaSchool of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, ChinaZhongye Changtian International Engineering Co., Ltd., Changsha 410205, ChinaAn efficient sintering process was proposed based on the autocatalytic denitrification of the sintered ore. The catalytic denitrification of sintered ore, the effect of double-layer ignition sintering process on the emission reduction in nitrogen oxides, and the impact on the quality of sintered ore were studied. The results showed that the catalyzed reduction of NO with sinter ore as a catalyst has a significant effect; when the airspeed reaches 3000 h<sup>−1</sup>, the temperature is 500 °C, and the conversion rate of NO can reach 99.58%. The sinter yield of double-layer ignition sintering is increased, solid fuel consumption is slightly reduced, falling strength is slightly increased, and drum strength is slightly decreased. Under the conditions of layer height proportion of 320/400 mm (lower/upper) and ignition time interval of 10 min, the yield, drum strength, shatter strength, and solid fuel consumption reached 61.60%, 54.82%, 46.75%, and 69.55%, respectively. NO<sub>x</sub> concentration under the 16% baseline oxygen content (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi>c</mi><mrow><mo stretchy="false">(</mo><mi>N</mi><msub><mi>O</mi><mrow><mi>x</mi><mo stretchy="false">)</mo></mrow></msub></mrow><mo>’</mo></msubsup></mrow></semantics></math></inline-formula>) in the flue gas of double-layer ignition sintering is reduced to a certain extent, and the generation time of NO<sub>x</sub> is greatly shortened. The double-layer ignition sintering process can reduce the emission of nitrogen oxides in the sintering process under the condition of guaranteeing the quality of sinter, which has great economic and environmental benefits.https://www.mdpi.com/2075-163X/12/1/33nitrogen oxidesinteringcatalytic reductiondouble-layer ignitiondenitration |
| spellingShingle | Benjing Shi Junying Wan Tiejun Chen Xianlin Zhou Yanhong Luo Jiawen Liu Mengjie Hu Zhaocai Wang Study on Double-Layer Ignition Sintering Process Based on Autocatalytic Denitrification of Sintering Layer Minerals nitrogen oxide sintering catalytic reduction double-layer ignition denitration |
| title | Study on Double-Layer Ignition Sintering Process Based on Autocatalytic Denitrification of Sintering Layer |
| title_full | Study on Double-Layer Ignition Sintering Process Based on Autocatalytic Denitrification of Sintering Layer |
| title_fullStr | Study on Double-Layer Ignition Sintering Process Based on Autocatalytic Denitrification of Sintering Layer |
| title_full_unstemmed | Study on Double-Layer Ignition Sintering Process Based on Autocatalytic Denitrification of Sintering Layer |
| title_short | Study on Double-Layer Ignition Sintering Process Based on Autocatalytic Denitrification of Sintering Layer |
| title_sort | study on double layer ignition sintering process based on autocatalytic denitrification of sintering layer |
| topic | nitrogen oxide sintering catalytic reduction double-layer ignition denitration |
| url | https://www.mdpi.com/2075-163X/12/1/33 |
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