Six-Roller Mill Flashcards
(16 cards)
What is the primary advantage of six-roller mills in breweries?
Greatest flexibility in grain processing
Six-roller mills can operate on both dry malt and conditioned malt.
How many sets of crushing rollers do six-roller mills have?
Three sets of crushing rollers
What separates the components of the grist by size in a six-roller mill?
Oscillating or inclined screens
What is the function of the first pair of rollers in a six-roller mill?
Breaks up the kernel
What happens to large husk particles in the six-roller mill design?
They do not pass through the screens and are carried out of the mill
What is the result of the second set of rollers in the milling process?
Grist is split into two equal streams
What is the purpose of the finer reciprocating screen in the milling process?
Allows flour to pass through while coarse grits are sent to the third set of rollers
What is a key feature of the compact design of the six-roller mill?
Large surface area for screening
How do the upper and lower screens operate in the six-roller mill?
They reciprocate in opposite directions
What is the gap range for the first roller for dry malt in a six-roller mill?
1.6-2.0 mm
Fill in the blank: Six-roller mills can produce grist at a rate of _______ kg/h per mm of roller length.
2-10
What allows some modern six-roller mills to regulate the speed of crushing?
Speed controllers on each set of rollers
What is one advantage of six-roller mills over two- and four-roller mills?
Better extract efficiency
True or False: Six-roller mills have a lower energy requirement than hammer or wet mills.
True
What is a disadvantage of dry six-roller mills regarding husk particle size control?
Poorer control than wet mills
What additional equipment do dry mills, including six-roller mills, require?
A pre-masher and grist case
