How many microns can be achieved by steel ball milling for 2 hours?

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Buckwheat flour and cocoa butter grinding from grinding to molding - full version
machine: LST ball mill 50 liters
Ingredients: cooked buckwheat flour + cocoa butter
process:
Melt the cocoa butter (about 15 minutes, you can melt the cocoa butter in advance and pour it into the ball mill)
Add buckwheat flour (you can choose to add buckwheat flour in batches when there is less cocoa butter), and grind for about 2 hours
After grinding, it can be directly divided into polycarbonate mold and cooled
demolding