By Les Edwards, Keith Neyrey, and Lorentz Petter Lossius.
During calcination, petroleum coke desulfurizes depending on the
sulfur content and final temperature. This has a negative effect on
coke properties such as real density, porosity, and reactivity.
Additional sulfur loss occurs during anode baking and this can
further deteriorate anode properties such as density and reactivity.
The sulfur level of high sulfur cokes used by the calcining
industry has increased since 2003. Although the average sulfur
content of cokes used by smelters has not increased significantly
due to environmental limits, the difference in sulfur level of cokes
used in blends has increased. Calciners must avoid “overcalcining”
high sulfur cokes and smelters must be wary of
additional desulfurization during baking. This paper presents a
review of past and recent data on coke and anode desulfurization,
and gives recommendations on how to best counter the problems
that can arise from use of higher sulfur cokes in blends.
To inquire about this paper, please contact Marvin Lubin, Manager of Customer Support.