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Journal of the Southern African Institute of Mining and Metallurgy

On-line version ISSN 2411-9717
Print version ISSN 0038-223X

J. S. Afr. Inst. Min. Metall. vol.110 n.2 Johannesburg Feb. 2010

 

TRANSACTION PAPER

 

A heat transfer model for high titania slag blocks

 

 

H. KotzéI; P.C. PistoriusII

IConsensi Consulting CC, Mthunzini, South Africa
IICarnegie Mellon University, Pittsburgh, USA. The authors were with the Department of Materials Science and Metallurgical Engineering, University of Pretoria, when this research was performed

 

 


SYNOPSIS

Titania slag is used as feedstock in the production of titanium dioxide pigment. It (titania slag) is the product of ilmenite smelting, a process whereby ilmenite is reduced at high temperature utilizing anthracite as a reducing agent. Although various slag tapping configurations are employed throughout the ilmenite smelting industry, the method of tapping the slag from the furnace into bell shaped cast steel pots, was the subject of investigation in this study.
The paper describes the formulation of a cooling model used to calculate and subsequently predict the temperature profile of a slag block during its cooling within the various cooling environments of pot cooling, air cooling and water cooling. The model was calibrated against actual internal slag temperature measurements and verified with information obtained from both pilot and industrial scale blocks. The paper concludes with solidification results and their practical implication.


 

 

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References

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