焦炭反應性對高爐塊狀帶含鐵爐料還原的影響

吳勝利; 庹必陽; 張麗華; 郭亮; 武建龍; 周宇

doi:10.13374/j.issn1001-053x.2013.03.011

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焦炭反應性對高爐塊狀帶含鐵爐料還原的影響

doi: 10.13374/j.issn1001-053x.2013.03.011

吳勝利^1, ,,
庹必陽^1,2,
張麗華¹,
郭亮¹,
武建龍¹,
周宇¹

1. 北京科技大學冶金與生態工程學院, 北京 100083;
2. 貴州大學礦業學院, 貴陽 550003

基金項目:

國家自然科學基金資助項目(50974143)

中央高校基本科研業務費專項(FRF-TP-12-021A)

詳細信息

通訊作者:
吳勝利,E-mail:wushengli@ustb.edu.cn

中圖分類號: TF533.1
計量
- 文章訪問數: 157
- HTML全文瀏覽量: 30
- PDF下載量: 15
- 被引次數: 0
出版歷程
- 收稿日期: 2012-02-26

Influence of coke reactivity on the ferric burden reduction of the lumpy zone in a blast furnace

1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Mining College, Guizhou University, Guiyang 550003, China

摘要

摘要: 研究了五種具有不同反應性的焦炭對高爐塊狀帶含鐵爐料還原的影響規律,并對料層的壓差、CO體積分數以及含鐵爐料的還原程度進行了分析.當爐內通入的原始氣體中CO體積分數(僅考慮CO和CO₂)為72.22%時,隨著焦炭反應性的增強,焦炭氣化速率加快,含鐵爐料顆粒周圍的CO體積分數升高,含鐵爐料的還原度依次增高,還原度從使用低活性焦炭時的33.18%增大到使用高活性焦炭時的53.83%;而當原始氣體成分中CO體積分數為66.67%時(低于900℃還原FeO的平衡氣相體積分數),使用高反應性焦炭也可還原出金屬鐵.由此可見,適當增加入爐焦炭的反應性,可促進焦炭與含鐵爐料間的耦合反應,提升料層CO體積分數,提高含鐵爐料進入軟熔帶區域的金屬化率.
- 高爐 /
- 焦炭 /
- 反應性 /
- 爐料 /
- 鐵礦石還原
Abstract: The influence of coke reactivity on the ferric burden reduction of the lumpy zone in a blast furnace was studied by using five kinds of coke with different reactivities.The pressure drop and CO volume fraction of the burden layer as well as the burden reduction degree were also analyzed.It is found that the coke gasification rate,CO volume fraction of the burden surface,and burden reduction degree increase with the increase of coke reactivity.When the CO volume fraction(only considering CO and CO₂) of the original gas is 72.22%the burden reduction degree increases from 33.18%for low-reactivity coke to 53.83%for high-reactivity coke.When the CO volume fraction of the original gas is 66.67%,which is slightly lower than the CO theoretical equilibrium volume fraction of FeO reduction at 900℃, metallic iron can be obtained by means of high-reactivity coke.Therefore,appropriately increasing the coke reactivity in a blast furnace can promote the coupling reaction between coke and ferric burden,improve the CO volume fraction of the burden layer,and increase the burden metallization rate before going into the cohesive zone.
- blast furnaces /
- coke /
- reactivity /
- burden /
- iron ore reduction