影響燒結工藝過程NO<sub><i>x</i></sub>排放質量濃度的主要因素解析

吳勝利; 張永忠; 蘇博; 王旭明; 張麗

doi:10.13374/j.issn2095-9389.2017.05.007

影響燒結工藝過程NO_x排放質量濃度的主要因素解析

doi: 10.13374/j.issn2095-9389.2017.05.007

吳勝利^1, ,,
張永忠^1,2,
蘇博¹,
王旭明²,
張麗^1,2

1) 北京科技大學冶金與生態工程學院, 北京 100083
2) 寶山鋼鐵股份有限公司, 上海 201900

詳細信息

中圖分類號: X756
計量
- 文章訪問數: 730
- HTML全文瀏覽量: 256
- PDF下載量: 20
- 被引次數: 0
出版歷程
- 收稿日期: 2016-09-11

Analysis of main factors affecting NO_x emissions in sintering process

1) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2) Baoshan Iron & Steel Co. Ltd., Shanghai 201900, China

摘要

摘要: 在燒結煙氣脫硫治理取得成效之后，煙氣脫硝迅即擺上鋼鐵企業的環保治理議程.在尚無經濟有效的末端治理脫硝工藝的前提下，有必要在燒結生產中進行工序過程控制，從而保持燒結煙氣NO_x排放質量濃度處于較低水平.本文通過統計解析的研究方法，系統分析了2013至2014年寶鋼實際燒結過程中原燃料條件參數、工藝條件參數對煙氣中NO_x排放質量濃度的影響規律.研究結果表明：適當降低赤鐵礦的使用比例，提高燒結粉、返礦的配比，提高鈣質熔劑中石灰石的使用比例，降低鎂質熔劑使用比例，保持燒結礦較高的堿度水平，強化制粒提高料層透氣性，堅持厚料層燒結等措施均有利于抑制燒結煙氣NO_x的排放質量濃度水平.
- 燒結 /
- 氮氧化物 /
- 煙氣減排 /
- 過程控制 /
- 相關性分析
Abstract: After effectively controlling the desulfurization of sintering flue gas, steel companies are now putting denitration on their agendas. In the absence of an economically viable and efficient end-of-pipe de-NO_x system, it is necessary to control the sintering process to reduce NO_x emissions. In this study, the influence of raw material and process condition parameters on NO_x emissions was statistically analyzed with data from Baosteel's sintering production during 2013-2014. The results indicate that NO_x emission levels associated with the sintering process can be lowered by decreasing the percentage of hematite, raising sintering fines and the return fines ratios, and enhancing the cold-air permeability, calcium ratio, and sintering bed depth.
- sintering process /
- nitrous oxides /
- flue gas reduction /
- process control /
- correlation analysis

HTML全文

參考文獻(5)

[9]	Wu S L, Sugiyama T, Morioka K, et al. Elimination reaction of NO gas generated from coke combustion in iron ore sinter bed. Tetsu-to-Hagané, 1994, 80(4):276
[10]	Morioka K, Inaba S, Shimizu M, et al. Primary application of the "In-Bed-deNO_x" process using Ca-Fe oxides in iron ore sintering machines. ISIJ Int, 2000, 40(3):280
[12]	Chen Y G, Guo Z C, Wang Z. Application of modified coke to NO_x reduction with recycling flue gas during iron ore sintering process. ISIJ Int, 2008, 48(11):1517
[13]	Katayama K, Kasama S, Sato K, et al. Effect of lime coating coke on decreasing NO_x emission from sintering process//AISTech-Iron and Steel Technology Conference Proceedings. Cleveland, 2015:1499
[14]	Yin J Q, Lü X W, Xiang S L, et al. Influence of CaO source on the formation behavior of calcium ferrite in solid state. ISIJ Int, 2013, 53(9):1571