this is just our experience in Dumai Refinery, Indonesia.
Green coke, after decoked from chamber, is transferred to stockpile by means of belt conveyor.
the stockpile is on a yard surrounded by circle wall at around 2 or 3 meters height.
It is open to atmosphere. So, if it rains, that’ll be no matter because green coke is getting dry fast.
the different treatment is for calcined coke. it is stored at silo. the silo is protected from rain and wind.