爐頂煤氣循環氧氣高爐一維氣固換熱與反應動力學模型

金鵬; 姜澤毅; 包成; 陸元翔; 張建良; 張欣欣

doi:10.13374/j.issn2095-9389.2015.04.015

爐頂煤氣循環氧氣高爐一維氣固換熱與反應動力學模型

doi: 10.13374/j.issn2095-9389.2015.04.015

金鵬¹,
姜澤毅^1,2, ,,
包成^1,2,
陸元翔¹,
張建良³,
張欣欣^1,4

1. 北京科技大學機械工程學院, 北京 100083;
2. 北京科技大學北京高校節能與環保工程研究中心, 北京 100083;
3. 北京科技大學冶金與生態工程學院, 北京 100083;
4. 北京科技大學冶金工業節能減排北京市重點實驗室, 北京 100083

基金項目:

國家自然科學基金資助項目(51134008),國家重點基礎研究發展計劃資助項目(2012CB720401)

詳細信息

通訊作者:
姜澤毅,E-mail:zyjiang@ustb.edu.cn

中圖分類號: TF559
計量
- 文章訪問數: 243
- HTML全文瀏覽量: 33
- PDF下載量: 10
- 被引次數: 0
出版歷程
- 收稿日期: 2014-11-15
- 網絡出版日期: 2021-07-10

One-dimensional mathematical model for oxygen blast furnaces with top gas recycling based on heat transfer and reaction kinetics

1. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Beijing Engineering Research Center of Energy Saving and Environmental Protection, Beijing 100083, China;
3. School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing, Beijing 100083, China;
4. Beijing Key Laboratory of Energy Saving and Emission Reduction for Metallurgical Industry, Beijing 100083, China

摘要

摘要: 結合風口回旋區燃燒和爐外煤氣預熱、脫除和循環的平衡關系,建立了氧氣高爐一維氣固換熱與反應動力學模型,并采用傳統高爐的運行和解剖數據對模型進行了驗證分析.通過模型研究了氧氣含量和上部循環煤氣流量對氧氣高爐爐內過程變量的影響規律.結果表明:氧氣含量偏低和上部循環煤氣流量不足時,會降低鐵礦石還原效果,爐渣內出現大量未還原鐵氧化物;氧氣含量和上部循環煤氣流量的提高可以有效提高爐內CO含量和鐵礦石還原速度,但提高上部循環煤氣流量會大幅提升爐頂煤氣溫度,增大熱量損失.與傳統高爐相比,氧氣高爐內CO含量提高1.0~1.5倍,爐內氣體還原性更強;鐵礦石還原完成位置提高1.49 m,全爐還原反應速度更快;直接還原度降低55.2%~79.2%,爐內直接還原反應消耗的碳量更少.
- 高爐 /
- 數學模型 /
- 煤氣 /
- 循環 /
- 穩態 /
- 傳熱 /
- 反應動力學
Abstract: A one-dimensional mathematical model based on heat transfer and reaction kinetics was developed for an oxygen blast furnace and was validated with the operating conditions and dissected data of a conventional blast furnace. The influence of oxygen concentration and upper gas volume on the smooth operation and process variables of the oxygen blast furnace was investigated by the model combined with coal combustion at tuyeres and top gas balance for separation and preheating. When the oxygen blast furnace with top gas recycling is of low oxygen concentration and upper gas volume, the reduction of iron ore is worsen and massive unreduced iron oxide comes into slag. In the oxygen blast furnace with top gas recycling, oxygen concentration and upper gas volume have significant effect on the temperature, reducing ability of gas and reduction rate. A comparative analysis of the conventional blast furnace and the oxygen blast furnace with top gas recycling show that the oxygen blast furnace has a higher reducing ability of gas (1.0 to 1.5 times higher for CO content), faster reduction rate (1.49 m higher for the position of ore reduction), and less direct reduction (55.2% to 79.2% less for direct reduction degree).
- blast furnaces /
- mathematical models /
- gas /
- recycling /
- steady state /
- heat transfer /
- reaction kinetics