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Research & Design of Ladle Pre-heater with High-Efficiency and Energy-Saving

Tuweiguo* Liu Rixin** Email:[email protected] http://www.cnmeter.com

ABSTRACT

The significance of ladle preheating and the application status of ladle pre-heater in abroad and China were introduced. The developed ladle pre-heater with self-preheating burner or with regenerative ceramic burners was described. The blast furnace gas could be used to heat ladle to the required high temperature if using this high efficiency and energy-saving ladle pre-heater. The technical and economic analysis was made according to the reforming results in Ma'anshan Steel Company. Key words: Ladle pre-heater, Self- preheating burner, Regenerative ceramic burner, Blast furnace gas

1

2

45~50% 20% 20~30%[1] 90t 400 1200 25

3

"" -300 1 1400 55-60%

[2]

1

TRMG 2 500 1) 500 2) 3) 4) 5) 800~1000 1400,

2

TRMG

80 RCB Nox 150-250K 75 5GJ/h RCB 3000L±15 HRS 3 4 7 85-95% 50K

3

NKK NFK [3] NKK 60 HRS 1000 HRS 30% HRS 70% 60% 35-40% 56% 10%

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41

4

500 ABC

42

, 5 HN-RCB

5

150-200 421

422 30200s 423 424 13.72 260

20 900×4.1816KJ/Nm 6 800 250

5

4 10 3 10 0.4~0.6MPa ~4000x4.18kJ/ m3 >6000Pa 350m3/h 0.4~0.6MPa 1540 m3/h 1000 m3/h20 1/3 8 400~800, 10% ~2000x4.18kJ/ m3 >3000Pa 3 350m /h >6000Pa 700 m3/h 500 >6000Pa 350 m3/h 11kW, 5800 / 8 4 45% 5000 350x5000=1750000m3 6 4 1.75x10 x4000x4.18kJ=2.9x10 GJ 24 /GJ:69.6 6 1000x5000=5.0x10 m3 48 /1000m3:24 93.6 5000 350x5000=1750000m3 6 4 1.75x10 x2000x4.18kJ=1.45x10 GJ 24 /GJ:34.8 6 5.5x5000=5.0x10 m3 0.37 /:1.02 35.82 93.6 - 35.8=57.8 3

6

500

[1] [2] . .. 15(1999) 5:10~13. . . 10(1988),1: .

[3] Toshikazu Akiyama, Application of Regenerative burner for Ladle Preheating System of Electric Arc Furnace.

In: Hsiao Tsechiang and Yoshikawa, Kunio, High Temperature Combustion, Beijing Sept.1999:181-190.

1987 1987 ---1999 9 1986 1989 1994 1 . 1994 1 ---1995 12

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Microsoft Word - 2000-.doc