基于不同保溫措施下的鐵水包熱狀態模擬分析

袁飛; 楊光; 徐安軍; 馮凱

doi:10.13374/j.issn2095-9389.2018.01.005

基于不同保溫措施下的鐵水包熱狀態模擬分析

doi: 10.13374/j.issn2095-9389.2018.01.005

北京科技大學冶金與生態工程學院, 北京 100083

基金項目:

國家重點研發計劃課題資助項目（2016YFB0601301）；國家自然科學基金資助項目（51674030）

詳細信息

中圖分類號: TF703.7
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出版歷程
- 收稿日期: 2017-06-12

Thermal state simulation analysis of molten iron ladle based on different insulation measures

School of Metallurgical and Engineering, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 在鐵鋼界面現有模式下的鐵水運輸過程中，由于鐵水包運行周期及保溫效果不夠理想，導致在高爐接鐵時鐵包耐材溫度低，熱狀態差，使得鐵水在鐵水包內的熱量損失較大.減小鐵水溫降能有效防止鐵水包結殼結瘤，降低離線烘烤頻率，間接提高鐵水包周轉率；同時在轉爐冶煉過程中，低溫鐵水將嚴重影響廢鋼的加入量和吹氧等操作.由此可見，鐵水溫度控制是鋼鐵企業節能降耗和高效有序生產的關鍵因素之一.為了減小鐵水溫降，本文建立了多種不同保溫措施情況下的鐵水包傳熱模型，通過fluent軟件對各模型在不同空包時間情況下的溫度場進行數值計算，分析不同保溫措施及空包時間下熱狀態對鐵水溫降的影響規律.分析結果表明：無保溫措施的情況下空包時間由5 h縮短至3 h能降低下一周期鐵水溫降2.2 K·h^-1；空包階段最合理的保溫措施為增設6 mm左右絕熱層并加包蓋，能提高工作層平均溫度約155 K，在空包3~5 h內能減小鐵水溫降3.4~3.7 K·h^-1.該結論為鐵水包空包階段采取合理保溫措施及不同保溫情況下空包運行時間控制提供了理論指導.
- 一包到底 /
- 熱狀態 /
- 保溫措施 /
- 溫降 /
- 有限體積法
Abstract: The turnover time for transporting a hot metal from a blast furnace to a basic oxygen furnace is long and therefore the heat preservation effects are not ideal. These factors affect the temperature and thermal state of the ladle refractories, which leads to the heat loss of the hot metal. Reducing the temperature drop of the hot metal can effectively prevent the hot metal nodules and decrease the frequency of offline baking; moreover, it indirectly increases the turnover rate of the hot metal ladle. At the same time, a hot metal with low temperature seriously affects the addition amount of scrap steel and oxygen blowing operations during the smelting process in the converter. Therefore, it can be observed that controlling the hot metal temperature is one of the key factors for energy saving and efficient production in a steel plant. To reduce the temperature drop of a hot metal, a variety of computation models of ladles with several insulation measures were established. In addition, the Ansys fluent software was used to simulate the temperature fields after the end of the charging. The influence of thermal states of ladles with different insulation measures and unloaded time on the temperature drop of the hot metal was investigated. The analysis shows that reducing the unloaded time from 5 h to 3 h can decrease the temperature loss of the hot metal by 2.2 K·h^-1. Using a ladle with an insulation layer of about 6 mm and an insulation cap is the most sensible measure to realize insulation. It can increase the average temperature of a working layer by almost 155 K, and this improvement can reduce the temperature loss of hot metal by 3.4-3.7 K·h^-1 during the 3 to 5 h unloaded time. The conclusions provide some academic bases and references for the reasonable insulation measures and control of the unloaded time of a multifunctional hot metal ladle.
- one ladle model /
- thermal state /
- insulation measure /
- temperature drop /
- finite volume method

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參考文獻(21)

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