中間包等離子加熱的物理模擬

王勇; 趙夢靜; 楊樹峰; 李京社; 張貫旭; 習小軍

doi:10.13374/j.issn2095-9389.2020.03.25.s16

中間包等離子加熱的物理模擬

doi: 10.13374/j.issn2095-9389.2020.03.25.s16

王勇^{1, 2},
趙夢靜^{1, 2},
楊樹峰^{1, 2, ,},
李京社^{1, 2},
張貫旭^{1, 2},
習小軍^{1, 2}

1.
北京科技大學冶金與生態工程學院，北京 100083
2.
北京科技大學高端金屬材料特種熔煉與制備北京市重點實驗室，北京 100083

基金項目: 國家自然科學基金資助項目（52074030, 51734003）

詳細信息

通訊作者:
E-mail：yangshufeng@ustb.edu.cn

中圖分類號: TF777
計量
- 文章訪問數: 820
- HTML全文瀏覽量: 500
- PDF下載量: 29
- 被引次數: 0
出版歷程
- 收稿日期: 2020-03-25
- 刊出日期: 2020-12-25

Physical simulation of tundish heated by plasma

WANG Yong^{1, 2},
ZHAO Meng-jing^{1, 2},
YANG Shu-feng^{1, 2
, ,},
LI Jing-she^{1, 2},
ZHANG Guan-xu^{1, 2},
XI Xiao-Jun^{1, 2}

1.
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2.
Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials, Beijing 100083, China

More Information

Corresponding author: E-mail: yangshufeng@ustb.edu.cn

摘要

摘要: 為了提高實際生產中中間包等離子加熱熱效率，改善中間包內鋼液流動狀態，本文根據某鋼廠中間包原型，通過物理模擬對比研究了有無等離子加熱和不同等離子加熱位置下中間包內溫度場和流場的變化情況。研究結果表明，在無等離子加熱條件下，中間包內死區比例較高，達到了36%，死區主要集中在中間包擋墻外側上部區域；當加熱位置位于擋墻外側時，中間包內死區比例與不加熱時相差不大，靠近加熱位置處的溫度急劇上升，擋墻內外兩側的溫度差較大，中間包內整體溫度分布不均勻；加熱位置位于擋墻內側時，中間包死區比例明顯降低，達到29.2%，平均停留時間約增加57 s，出水口溫度明顯上升（約7 ℃），中間包內溫度分布更均勻。
- 中間包 /
- 等離子加熱 /
- 物理模擬 /
- 溫度分布 /
- 死區比例
Abstract: This study proposes a model to increase the heating efficiency of tundish plasma heating and improve the flow of molten steel in a tundish during production. A physical model was simulated based on the tundish prototype of a steel plant, and the temperature field and flow field of molten steel in the tundish with and without plasma heating at different plasma heating positions were analyzed. The research results showed that in the tundish without plasma heating, the proportion of the dead zone was high, reaching 36%. Moreover, the dead zone was mainly concentrated in the upper area outside the weir in the tundish. When the heating position was located outside the weir, it was found that there was little difference in the proportion of the dead zone between the tundish with and without plasma heating. The temperature near the heating position increased sharply, and the temperature difference of molten metal between the inside and outside of the weir was large. Moreover, the overall temperature distribution in the tundish was not uniform. When the heating position was located inside the weir, the proportion of the dead zone significantly decreased, reaching 29.2%. Further, the average residence time increased by about 57 s. The temperature of the outlet of the tundish increased significantly (about 7 ℃), and the temperature distribution in the tundish was uniform.
- tundish /
- plasma heating /
- physical simulation /
- temperature distribution /
- proportion of the dead zone

HTML全文

圖 1 中間包結構圖。（a）整體結構；（b）主視圖

Figure 1. Tundish structure: (a) overall structure; (b) main view

下載: 全尺寸圖片幻燈片

圖 2 實驗設備示意圖

Figure 2. Schematic diagram of experimental equipment

下載: 全尺寸圖片幻燈片

圖 3 A1測溫方案示意圖

Figure 3. Schematic diagram of temperature measurement in scheme A1

下載: 全尺寸圖片幻燈片

圖 4 A2測溫方案示意圖

Figure 4. Schematic diagram of temperature measurement in scheme A2

下載: 全尺寸圖片幻燈片

圖 5 不同實驗方案下的RTD曲線。（a）方案A0；（b）方案A1；（c）方案A2

Figure 5. RTD curve under different schemes: (a) scheme A0; (b) scheme A1; (c) scheme A2

下載: 全尺寸圖片幻燈片

圖 6 方案A0的中間包流場圖。（a）10 s；（b）30 s；（c）60 s；（d）90 s；（e）120 s；（f）180 s；（g）240 s；（h）300 s

Figure 6. Flow field in tundish of scheme A0: (a) 10 s; (b) 30 s; (c) 60 s; (d) 90 s; (e) 120 s; (f) 180 s; (g) 240 s; (h) 300 s

下載: 全尺寸圖片幻燈片

圖 7 方案A1的中間包流場圖。（a）10 s；（b）30 s；（c）60 s；（d）90 s；（e）120 s；（f）180 s；（g）240 s；（h）300 s

Figure 7. Flow field in tundish of scheme A1: (a) 10 s; (b) 30 s; (c) 60 s; (d) 90 s; (e) 120 s; (f) 180 s; (g) 240 s; (h) 300 s

下載: 全尺寸圖片幻燈片

圖 8 方案A2的中間包流場圖。（a）10 s；（b）30 s；（c）60 s；（d）90 s；（e）120 s；（f）180 s；（g）240 s；（h）300 s

Figure 8. Flow field in tundish of scheme A2: (a) 10 s; (b) 30 s; (c) 60 s; (d) 90 s; (e) 120 s; (f) 180 s; (g) 240 s; (h) 300 s

下載: 全尺寸圖片幻燈片

圖 9 不同實驗方案下的溫度場分布情況。（a）方案A1；（b）方案A2

Figure 9. Temperature field distribution under different schemes: (a) scheme A1; (b) scheme A2

下載: 全尺寸圖片幻燈片

表 1 中間包原型與模型的主要參數

Table 1. Main parameters of tundish prototype and model mm

Classification	Top width	Bottom width	Top length	Bottom length	Inlet diameter	Height	Surface height of overflow	Insertion depth of long nozzle	Working liquid level height
Prototype	1405	857	6621	6073	90.0	1555	1215	250.0	1115
Water model	351	214	1655	1518	22.5	389	304	62.5	279

下載: 導出CSV

表 2 主要工藝參數及流量

Table 2. Main process parameters and flow rate

Slab section/mm²	Casting speed/(m·min^?1)	Q_r/(L·min^?1)	Q_m/(L·min^?1)
210×700	0.8	117.6	3.68

下載: 導出CSV

表 3 模型與原型的等離子加熱參數

Table 3. Plasma heating parameters of model and prototype

Classification	Power input/W	Heating zone area/m²	Viscosity/ (kg·m^?1·s^?1)	Depth/ m	Thermal diffusivity/ (m²·s^?1)	Heating zone length /m	Average velocity of liquid /(m·s^?1)	Plasma heating number
Model	3354	0.018	0.001	0.279	1.43×10^?7	0.110	0.035	44773.1
Prototype	300000	0.300	0.006	1.115	7.7×10^?7	0.600	0.045	44901.4

下載: 導出CSV

表 4 中間包等離子加熱水模擬實驗方案

Table 4. Experimental schemes of tundish plasma heating in water simulation

Scheme	Heating position	Steam flow rate/(kg·h^?1)
A0 (Non plasma heating)
A1	Inside of weir	6
A2	outside of weir	6

下載: 導出CSV

表 5 不同實驗方案的流體流動特征參數

Table 5. Flow characteristic parameters of fluid in different schemes

Scheme	Stagnation time /s	Peak time /s	Average residence time /s	Volume fraction / %
Scheme	Stagnation time /s	Peak time /s	Average residence time /s	Dead volume fraction	Dispersed plug volume fraction	Well-mixed volume fraction
A0	58.0	120.7	528.0	36.0	10.8	53.2
A1	127.7	362.0	584.7	29.2	29.6	41.1
A2	34.3	316.7	477.0	42.2	21.2	36.5

下載: 導出CSV

www.77susu.com

參考文獻(23)

[1]	Sahai Y. Tundish technology for casting clean steel: a review. Metall Mater Trans B, 2016, 47(4): 2095 doi: 10.1007/s11663-016-0648-3
[2]	Chang S, Zhong L C, Zou Z S. Simulation of flow and heat fields in a seven-strand tundish with gas curtain for molten steel continuous-casting. ISIJ Int, 2015, 55(4): 837 doi: 10.2355/isijinternational.55.837
[3]	Kumar A, Mazumdar D, Koria S C. Modeling of fluid flow and residence time distribution in a four-strand tundish for enhancing inclusion removal. ISIJ Int, 2008, 48(1): 38 doi: 10.2355/isijinternational.48.38
[4]	Du Y W, Du H M, Du Y L, et al. Numerical analysis the influence factors of the heat loss in the continuous tundish. Henan Metall, 2017, 25(4): 14 doi: 10.3969/j.issn.1006-3129.2017.04.005 杜亞偉, 杜海明, 杜玉蘭, 等. 連鑄中間包熱損失影響因素的數值分析. 河南冶金, 2017, 25(4):14 doi: 10.3969/j.issn.1006-3129.2017.04.005
[5]	Wang Q, Wang F, Wang B, et al. Fluid flow and heat transfer in a continuous casting tundish with the channel type induction heating. J Iron Steel Res Int, 2012, 19(S2): 969
[6]	Vargas-Zamora A, Morales R D, Díaz-Cruz M, et al. Heat and mass transfer of a convective-stratified flow in a trough type tundish. Int J Heat Mass Transfer, 2003, 46(16): 3029 doi: 10.1016/S0017-9310(03)00068-1
[7]	Tian J Y, Zhang X L, Li J S, et al. Review of plasma heating technology for continuous casting tundish. Wide Heavy Plate, 2017, 23(2): 45 doi: 10.3969/j.issn.1009-7864.2017.02.012 田建英, 張雪良, 李京社, 等. 連鑄中間包等離子加熱技術綜述. 寬厚板, 2017, 23(2):45 doi: 10.3969/j.issn.1009-7864.2017.02.012
[8]	Xu J C, Jian H, Nie G S, et al. Application of induction heating technology on casting middle package. Metall Equip, 2018(6): 54 doi: 10.3969/j.issn.1001-1269.2018.06.015 徐靖馳, 蹇華, 聶高升, 等. 感應加熱技術在連鑄中間包上的應用. 冶金設備, 2018(6):54 doi: 10.3969/j.issn.1001-1269.2018.06.015
[9]	Jiang Z H, Li C J, Jiang Y L, et al. Laboratory research on electroslag heating of molten steel in ladle. Iron Steel, 1995, 30(3): 12 姜周華, 李晨雋, 姜永林, 等. 鋼水爐外電渣加熱的實驗研究. 鋼鐵, 1995, 30(3):12
[10]	Zhang X S, Zhou Y Q. A mathematical model and simulated test of electroslag heating of liquid steel in a tundish. Energy Metall Ind, 1997, 16(2): 32 張新生, 周筠清. 電渣加熱中間包鋼水的數學模型及實驗研究. 冶金能源, 1997, 16(2):32
[11]	Li Y, Li L, Chen Y Y, et al. Numerical simulation of electromagnetic-thermal-hydrodynamic field in tundish with sidewall-type induction heating. J Northeast Univ Nat Sci, 2017, 38(7): 966 李陽, 李亮, 陳圓圓, 等. 側壁式感應加熱中間包磁/熱/流耦合模擬. 東北大學學報(自然科學版), 2017, 38(7):966
[12]	Zuo X J, Yan J W, Luo L H, et al. Application of plasma tundish heating technology in continuous casting process. Iron Steel Technol, 2016(1): 10 佐祥均, 閻建武, 羅利華, 等. 等離子中間罐加熱技術在連鑄過程中的應用. 鋼鐵技術, 2016(1):10
[13]	Badie J M, Bertrand P, Flamant G. Temperature distribution in a pilot plasma tundish: comparison between plasma torch and graphite electrode systems. Plasma Chem Plasma Process, 2001, 21(2): 279 doi: 10.1023/A:1007004532610
[14]	Barrón-Meza M A, Barreto-Sandoval J D J, Morales R D. Physical and mathematical models of steel flow and heat transfer in a tundish heated by plasma. Metall Mater Trans B, 2000, 31(1): 63 doi: 10.1007/s11663-000-0131-y
[15]	Jiang J, Lu H B, Li Q Y, et al. Application of tundish plasma heater. Contin Cast, 2018, 43(2): 7 蔣軍, 路海波, 李勤勇, 等. 中間罐等離子加熱技術在青島特鋼的應用. 連鑄, 2018, 43(2):7
[16]	Pak Y A, Filippov G A, Yusupov D I, et al. Two-strand tundish with chambers for plasma heating of liquid metal. Metallurgist, 2014, 58(7): 672
[17]	Chattopadhyay K, Isac M, Guthrie R I L. Physical and mathematical modelling of steelmaking tundish operations: a review of the last decade (1999–2009). ISIJ Int, 2010, 50(3): 331 doi: 10.2355/isijinternational.50.331
[18]	Yang S F, Wu J Q, Li J S, et al. Physical simulation on optimization of flow control devices in four strand tundish. China Metall, 2019, 29(4): 81 楊樹峰, 吳金強, 李京社, 等. 四流中間包控流裝置優化物理模擬. 中國冶金, 2019, 29(4):81
[19]	Braga B M, Tavares R P. Description of a new tundish model for treating RTD data and discussion of the communication “New insight into combined model and revised model for RTD curves in a multi-strand tundish” by Lei. Metall Mater Trans B, 2018, 49(4): 2128 doi: 10.1007/s11663-018-1295-7
[20]	Chatterjee S, Chattopadhyay K. Transient steel quality under non-isothermal conditions in a multi-strand billet caster tundish: part Ⅱ. Effect of a flow-control device. Ironmaking Steelmaking, 2017, 44(6): 413 doi: 10.1080/03019233.2016.1214015
[21]	Liu C L, Cui H, Li Y Y, et al. Study on physical simulation for flow field optimization in tundish for two-strand slab. Metall Equip, 2019(3): 9 劉崇林, 崔衡, 李源源, 等. 雙流板坯中間包流場優化的物理模擬研究. 冶金設備, 2019(3):9
[22]	Wu G H, Tang H Y, Xiao H, et al. Physical simulation on a 7-strand continuous casting tundish with channel type induction heating. Iron Steel, 2017, 52(11): 20 吳光輝, 唐海燕, 肖紅, 等. 通道式感應加熱7流中間包流場的物理模擬. 鋼鐵, 2017, 52(11):20
[23]	Barreto-Sandoval J D J, Hills A W S, Barrón-Meza M A, et al. Physical modelling of tundish plasma heating and its mathematical interpretation. ISIJ Int, 1996, 36(9): 1174 doi: 10.2355/isijinternational.36.1174