COREX豎爐圍管堵塞位置及其演變過程的物理模擬

周恒; 吳勝利; 寇明銀; 姚舜; 游洋; 羅志國; 鄒宗樹

doi:10.13374/j.issn2095-9389.2018.03.011

COREX豎爐圍管堵塞位置及其演變過程的物理模擬

doi: 10.13374/j.issn2095-9389.2018.03.011

1) 北京科技大學冶金與生態工程學院, 北京 100083;
2) 東北大學冶金學院, 沈陽 110819

基金項目:

中央高校基本科研業務費資助項目(FRF-TP-17-036A1)

中國博士后科學基金面上資助項目(2017M610769)

詳細信息

中圖分類號: TF557
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- 被引次數: 0
出版歷程
- 收稿日期: 2017-07-17

Physical simulation of the position and evolution process of dust accumulation in the bustle pipe of a COREX shaft furnace

1) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2) School of Metallurgy, Northeastern University, Shenyang 110819, China

摘要

摘要: 建立COREX豎爐三維半周物理模型,模擬豎爐圍管粉塵初始堵塞位置及其演變過程,考察鼓風量、排料速度、非工況排料等操作條件對圍管粉塵堵塞的影響.模擬結果顯示,COREX豎爐圍管初始堵塞位置為AGD架梁圓管前方的8^#~12^#導氣槽區域.當導氣槽前端填充床內形成粉塵沉積區后,若沉積區向上發展速度大于其隨物料向下運動速度,粉塵沉積區向圍管方向發展,并逐步堵塞圍管導氣槽,進而在圍管內形成粉塵堆積區.該堆積區在圍管內繼續發展,使得其堆腳向圍管遠端運動,從而逐步將遠端導氣槽堵塞.此外,模擬發現隨著排料速度加快及鼓風量增加,圍管內不易發生粉塵堵塞.當爐內非工況條件發生時,粉塵堆積的動態平衡被打破,易造成圍管內粉塵的堆積堵塞.
- COREX豎爐 /
- 圍管 /
- 粉塵堵塞 /
- 物理模擬 /
- AGD
Abstract: A 3D semi-cylindrical physical model of COREX shaft furnace was established, and the initial position and evolution process of dust accumulation in the bustle pipe of a shaft furnace were investigated through this model. The effects of discharging rate, gas flow rate, and non-normal operation condition on dust accumulation in the bustle pipe were also studied. The results show that the initial position of dust accumulation in the bustle pipe is in the 8^#-12^# slot region, located before the supporting tube of AGD beam. The dust blockage is first formed in the packed bed near the slot and then blocks the slot and grows into the bustle pipe if the growth velocity of the blockage region is greater than the descending velocity. Finally, dust accumulation can be observed in the bustle pipe. The dust accumulation is still growing in the bustle pipe, and the edge of the dust pile could develop to the far side; thus, the other slots would be gradually clogged by dust. Moreover, the results confirm that with increased discharge and gas flow rates, dust accumulation in the bustle pipe is greatly hindered. In contrast, under non-normal operation conditions, the dynamic balance of dust blockage is broken, and dust accumulation in bustle pipe is easily formed.
- COREX shaft furnace /
- bustle pipe /
- dust accumulation /
- physical simulation /
- areal gas distribution

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參考文獻(10)

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