Figure 2. Semi-micro
experimental mill flow with the roll corrugations per inch. The break rolls
have corrugation spirals of 1.25, 1.75, 1.88, and 1.25 inch/ft. in progressive
order, and the middling reduction roll spirals are 1.25, 1.25, 1.25, and
frosted smooth. Roll spacings for first, second and third break are 0.035,
0.0035, and 0.002 inch respectively. The middling rolls are set at 0.0015,
0.0020 and 0.0015 inch respectively.
BREAK UNIT
REDUCTION UNIT
BRABENDER QUADRUMAT JR. WITH
QUADRUMAT SR. BREAK ROLLS
BRABENDER QUADRUMAT SR.
REDUCTION UNI
ROLLS:
Diameters: 2.8 inches Speed:
Fast rolls: 1200 RPM Slow rolls: 560 RPM
Diferential: 2.14 to 1
SIFTING SCHEDULE:
Break Stock:
Bran: Removed after 1 min. Middlings: Removed after an additional 2 min. (3
min. total)
Reduction Stock: 3 min.
TEMPER:
Soft wheats 13%
Hard wheats 14.5%
SAMPLE SIZE:
100-500 grams tempered wheat
(held constant within each comparison group)
SIFTERS:
8 and 12 inch
Tyler testing sieves on strand sifters.
