chap 3: corn dry milling Flashcards
1
Q
Main product (2)
A
- flaking grits
- brewing grits
2
Q
co-product (2)
A
- corn meal and flour
- hominy feed and ruminant flour
3
Q
quality measures (4)
A
- test weight
- kernel density
- kernel size
- stress crack evaluation
4
Q
Process steps (6)
A
- tempering
- degermination (tails and throughs)
- aspiration
- gravity separation
- roller mill
- oil expelling
- coproduct
5
Q
Temper goal
A
add moisture content to corn to better separate the germ. water goes through the tip cap
6
Q
goal of degermination and equipment
A
- separate corn in tails and throughs in a Beall degerminator
- tail=pericarp+endosperm
- through=germ+endosperm
7
Q
Tails operation of separation (3)
A
- aspirator to remove pericarp from endosperm
- sifter for endosperm into flaking grits
- roller mill to form (smaller grits, corn meal, corn flour)+rest of pericarp
8
Q
Through operation of separation(4)
A
- aspirator separates pericarp from endosperm+germ
- endosperm+germ separated into the gravity table
- oil expeller forms germ cake+crude oil
- pericarp+germ cake into hammer mill for hominy food
9
Q
what process does aspirator use?
A
terminal velocity influenced by particle shape, size and density
