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Metallurgical and Materials Transactions B

, Volume 39, Issue 1, pp 16–22 | Cite as

Desulfurization Rate during the Copper Blow in a Peirce–Smith Converter

  • A. Roselló
  • J. Martínez
  • P. Barrios
  • F. Carrillo
Article

Abstract

The desulfurization rate in a Peirce–Smith converter (which works as a well-mixed reactor) was obtained during the copper blow. Conversion data of the copper sulfide as a function of the operation time were correlated distinguishing between two kinetic steps; in both cases, the conversion was proportional to time. The variation of the matte temperature was not influential, so the chemical resistance in the bulk of the melt can be considered negligible. The variation in the global volumetric coefficient deduced from the experimental data was justified by a model having two resistances to mass transfer, the gas-side resistance being constant and the liquid-side resistance increasing when the sulfide concentration decreased.

Keywords

Desulfurization Bubble Size Copper Sulfide Desulfurization Rate Oxygen Efficiency 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Nomenclature

A

interfacial area (m2)

aL

specific surface (m2/m3 liquid)

C

concentration (mol/m3)

D

diffusivity (m2/s)

E

enhancement factor (—)

Ei

instantaneous enhancement factor (—)

eG

gas holdup (—)

H

Henry constant (atm m3/mol)

K

overall kinetic coefficient (m/s)

K′

overall kinetic coefficient (mol/atm·m2·s)

k

specific reaction rate (1/s)(mol/m3)1-n-m

kG

mass-transfer coefficient in the gas phase (m/s)

kL

mass-transfer coefficient in the liquid phase (m/s)

m, n

reaction orders (—)

(NS)0

initial number of sulfur mol (mol)

\( P_{\text{O}_2} \)

oxygen pressure (atm)

R

gas constant (atm m3/mol K)

t

time (s)

t*

normalized time (—)

T

temperature (K)

uG

gas velocity (m/s)

VL

liquid volume (m3)

vG

gas flowrate (m3/s)

xFe

iron conversion (—)

xS

sulfur conversion (—)

Subscripts

i

interphase

f

final

G

gas

L

liquid

S

sulfur

O2

oxygen

0

initial

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Copyright information

© THE MINERALS, METALS & MATERIALS SOCIETY and ASM INTERNATIONAL 2008

Authors and Affiliations

  • A. Roselló
    • 1
  • J. Martínez
    • 2
  • P. Barrios
    • 2
    • 3
  • F. Carrillo
    • 1
  1. 1.Department of Chemical EngineeringUniversity of SevilleSevillaSpain
  2. 2.Atlantic Copper. CompanyHuelvaSpain
  3. 3.Cumerio CompanyBrusselsBelgium

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