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Effect of Chute Rotation on Particles Movement for Bell-less Top Blast Furnace

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Abstract

For the bell-less top blast furnace, when particles move along the chute, the particles’ motion direction and the frictional force acting on them will change due to the chute rotation, which consequently influences the velocity at the tip of chute, changes the burden flow width and impact point, and finally affects the stock profile and gas flow distribution. So the influence of chute rotation needs to be considered when calculating the burden trajectory with a mathematical model. The mathematical model was established to analyze the influence of Coriolis force on particle velocity at chute tip as well as height and width of burden flow in chute, and to summarize the effect of Coriolis force on burden distribution, thereby making the calculation result more accurate.

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Abbreviations

F C :

Coriolis force, N

F T :

Centrifugal force, N

F N :

Supporting force, N

F f :

Frictional force, N

G:

Gravity force, N

g:

Gravitational acceleration, m/s2

H ch :

Chute torque length, m

h db :

Height of burden flow in chute without chute rotating, m

h rb :

Height of burden flow in chute with chute rotating, m

h b :

Width of burden flow when it is out of chute, m

l:

Distance of particle position to BF center, m

L:

Length of chute, m

L 0 :

Effective length of chute, m

L m :

Length of particle moved in chute, m

m:

Mass of a particle, kg

N:

Normal pressure force, N

R:

Radius of chute, m

t:

Moving time, s

v:

Velocity of particle, m/s

x,y,z:

Distance of particles moved in X,Y, and Z axis, m

α:

Chute inclinational angle, (°)

ω:

Angular velocity of chute, rad/s

θ:

Moved angle of burden along chute, (°)

η:

Coefficient of friction

φ:

Field angle of burden width when falling to chute, (°)

References

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China

    Zhao-jie Teng (Doctor Candidate), Shu-sen Cheng & Guo-lei Zhao

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

    Zhao-jie Teng (Doctor Candidate), Shu-sen Cheng & Guo-lei Zhao

  3. MCC Capital Engineering and Research Incorporation Limited, Beijing, 100176, China

    Peng-yu Du

Authors
  1. Zhao-jie Teng
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  2. Shu-sen Cheng
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  3. Guo-lei Zhao
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  4. Peng-yu Du
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Corresponding author

Correspondence to Zhao-jie Teng.

Additional information

Foundation Item: Item Sponsored by National Natural Science Foundation of China (60872147)

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Teng, Zj., Cheng, Ss., Zhao, Gl. et al. Effect of Chute Rotation on Particles Movement for Bell-less Top Blast Furnace. J. Iron Steel Res. Int. 20, 33–39 (2013). https://doi.org/10.1016/S1006-706X(13)60213-7

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  • DOI: https://doi.org/10.1016/S1006-706X(13)60213-7

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