I am a little concerned about injecting slurry at the top of the drum. This may be hard on the metallurgy above the coke bed if injected at the beginning of a quench cycle while the metal is still hot.
I think there is a potential of plugging the top of the drum by closing/plugging the channels created when the drum was steam-stripped, and reducing or effecting how the drum cools. Since the top of the drum would not be as hot as the drum inlet, you can end up with mud on-top of your coke bed which can become a safety issue if you get a blow out when un-heading or cutting.
Thank you dragon, sorry to reply late but, I do appreciate it.
I will be glad if you can explain me the summary of the process in short for the problem it will have. I got one more week to decide on it.