Cooling and removal of medium-temperature catalysts in the ferro-chromium series
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Can the medium-temperature catalyst be removed without being oxidized to iron oxide trioxide, after it has naturally cooled to room temperature (provided that the steam displacement is satisfactory)?
Generally, it is oxidized to iron oxide trioxide first, and then cooled by forced cooling before being discharged
I agree with you; that approach reduces the risk. It is theoretically possible to proceed without passivation as well, but when removing the catalyst, nitrogen gas must be introduced into the converter to prevent air from entering and causing combustion or fire. If the catalyst catches fire after falling to the ground, it must be extinguished with water. Doing this is extremely dangerous!