Student Number : 0318397E -
MSc dissertation -
School of Chemical and Metallurgical Engineering -
Faculty of Engineering and the Built Environment / An experimental study of the effects of a slag phase on mass transport in a onefifth
water model of a 100ton CLU-converter was conducted. The study was a
follow up to earlier investigations conducted in the absence of a simulated slag
phase. Kerosene (10% by volume) was used to represent the slag phase in the cold
model experiments. The presence of a slag phase increased the mixing time of a
tracer solution in the bath. The mixing time, defined at 99.66% bath homogeneity,
was found to increase with bath height and a lowering gas flow rate. The
functional relationship, Tmix = 4.39Q-0.73W0.24H1.12, was established as expressing
the effect of gas flow rate (Q), bath weight (W), and bath height (H) on the mixing
time (Tmix). The mixing time increased by an average of 16.3% after slag
inclusion. The mass transfer parameter [(Reloc,r)0.25(Ret)0.32] values obtained in the
absence of a slag phase decreased by an average of 32.2% with slag inclusion.
Calculated mass transfer coefficients increased with gas flow rate and a decrease
in bath height. The relationship, K Q0.08, showing derived mass transfer
coefficient (K) dependence on the gas flow rate (Q) was established. The
proportionality constant in the equation was observed to vary with bath height,
gas flow rate and sample location. Contour maps representing variation of mass
transfer coefficients in the bath regions were produced.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:wits/oai:wiredspace.wits.ac.za:10539/1527 |
| Date | 31 October 2006 |
| Creators | Chaendera, Admire |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | 8709 bytes, 2435382 bytes, 110164 bytes, application/pdf, application/pdf, application/pdf, application/pdf, application/pdf, application/pdf |
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