Section 5 - Reduction System Flashcards
Draw the reduction system
Page 29 fig 13
What does the reduction system consist of
smooth reduction rolls and sifting machines
What is the aim of the reduction system
To reduce the various grades of the endosperm released on the breaks to flour, without damaging the bran and germ
What is reduction
Gradual grinding and sifting of various particle sizes until they are fine enough for flour
What differential do reduction rolls run at
1.25:1
What do sifting machines do
Dress out the flour at each stage down the system
Grade the stocks that need further grinding
Separate the stocks which eventually go to wheatfeed
What does the reduction system do
Grinds purified semolina and middlings on numerous stages of smooth rolls
Sifts out and dresses flour made by these rolls to make the final separation
How many sieves can be in each section
Up to 30
How many reduction passages are there now
10, fallen from 13 in the 50s
What did the total surface fall from and to
40mm/100kg/24hrs to 8-10mm
How is a low reduction passage surface possible
A result of flake disruptors, impact detachers, and high capacity sifters, with lower stock temps
What surface is used in a long system
up to 40mm/100kg/24h
What is the roll of a detacher
To break up clumps of endosperm flakes so they can be sifted
Whats another name for a detacher
Flake disrupter
Where do you find flake disrupters
Head reduction passages between rolls and sifters
