Granular ice

Granular ice is one of the types of ice commonly referred to as Flake ice.

Made in a tall, thin, vertical drum or 'freezing unit' with an auger running axially in the centre. A water level is set in the bottom of the drum by gravity and as ice crystals begin to form, the auger carries them up the drum where they are compressed and further frozen until they are ejected from the top as 'flakes'.