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A new approach to investigate the drop size distribution in basic oxygen steelmaking

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Abstract

An experimental study was conducted to investigate the drop size and the drop size distribution resulting from the interaction between an impinging oxygen jet of high velocity and the molten steel bath by employing a new approach. The results on the drop size and the drop size distribution are presented and discussed. It is shown that the drop size produced in BOF steelmaking obeys the Rosin-Rammler-Sperling distribution function. Table I. Symbols and Their Meaning

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Abbreviations

c :

Velocity of sound

d :

Upper limit of class diameter in a given class

d′ :

Characteristic parameter of the distribution function [9]

d b :

Bath diameter

d limit :

Limiting diameter of the drop corresponding to

R :

= 0.1 pct

d t :

Throat diameter of the nozzle

Fr:

Froude number

g :

Acceleration due to gravity

h :

Useful height of the crucible or converter

h b :

Bath height

m:

Momentum flow rate

M :

Dimensionless momentum flow rate

Ma = U m/c:

Mach number

Mo 2 :

Molecular weight of oxygen

n :

Characteristic parameter of the distribution function [9]

N :

Number of nozzles in the lance

N b :

Blow number

P :

Ambient pressure

p o :

Supply pressure of oxygen

q m :

Maximum impact pressure of the oxygen jet

R :

Cumulative weight (in pct) retained on the sieve

Ru :

Universal gas constant

Re:

Reynolds number

T :

Absolute temperature

U m :

Maximum impact velocity of the oxygen jet

V :

Volume flow rate of gas

W :

Weight of the produced drop

x :

Lance distance

η b :

Viscosity of the gas jet

ρ b,ρb,ρb :

Density of oxygen jet, liquid, and of the drops, respectively

Φ = d/dlimit :

Fractional diameter of the drop

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Authors and Affiliations

  1. Institute for Ferrous Metallurgy, Technical University of Aachen, West Germany

    Satish C. Koria (Scientific Assistant) & Klaus W. Lange (Professor)

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  1. Satish C. Koria
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  2. Klaus W. Lange
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Koria, S.C., Lange, K.W. A new approach to investigate the drop size distribution in basic oxygen steelmaking. Metall Trans B 15, 109–116 (1984). https://doi.org/10.1007/BF02661068

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