PNS/BAFS PAES 251&252:2021 - Corn Mill Flashcards
combination of corn grits other than corn grits nos. 10 to 18 (e.g. corn grits no. 20, corn grits no. 24) floured corn and bran
by-product
grits with particle size from 0.708 mm to 0.841 mm which passed through US Sieve No. 20 but are retained in US Sieve No. 25
corn grits no. 20
grits with particle size of 0.707 mm and smaller which passed through US Sieve No. 25
corn grits no. 24
fine powder by-product of corn milling process
floured corn
fines
embryo of the kernel removed during the degermination process
germ
outer covering of the corn kernel removed during the milling process
pericarp
hull
attachment of the kernel to the cob; the entryway of nutrients, water, etc. to the kernel
tip cap
attachment of the kernel to the cob; the entryway of nutrients, water, etc. to the kernel
tip cap
combination of germ, tip cap, pericarp, and corn grits
bran
whole grain of shelled corn
corn kernel
milled corn grains where the outer covering (pericarp), germ (embryo), and tip cap have been removed leaving only the endosperm that passed through different sieve sizes
corn grits
machine that removes the pericarp, crushes the kernel, polishes the grits, and sorts the grits into different sizes
corn mill
used to remove the germ, tip cap, and pericarp from the corn kernel
degermer
ratio of the weight of degermed corn kernels to the initial weight of the degermer output sample, expressed in percent (%
degermer efficiency
process of separating germ, pericarp, and tip cap from the endosperm and reducing it into grits without soaking the corn kernels before milling
dry milling
part of the corn mill used to grind the degermed corn kernels into corn grits
grinding assembly
part of the corn mill permitting smaller particles to fall through the openings by
means of oscillating or rotating screen, wire mesh, or perforated metal sheet
grit size separation assembly
sifter
grits with particle size from 1.69mm to 2.00mm which passed through US Sieve No. 10 but are retained in US Sieve No. 12
corn grits no. 10
grits with particle size from 1.42mm to 1.68mm which passed through US Sieve No. 12 but are retained in US Sieve No. 14
corn grits no. 12
grits with particle size from 1.20mm to 1.41mm which passed through US Sieve No. 14 but are retained in US Sieve No. 16
corn grits no. 14
grits with particle size from 1.01mm to 1.19mm which passed through US Sieve No. 16 but are retained in US Sieve No. 18
corn grits no. 16
grits with particle size from 0.842mm to 1.00mm which passed through US Sieve No. 18 but are retained in US Sieve No. 20
corn grits no. 18
ratio of the total weight of main products to the total weight of corn kernel input, expressed in percent (%)
main product recovery
quantity of corn kernels that the corn mill can process to produce corn grits of desired size per unit of time, expressed in kilograms per hour (kg/h)
milling capacity
A grinder consists of a fluted steel shaft operating inside a perforated steel screen, which also carries a projecting strip of steel whose distance from the shaft can be varied.
Steel huller
A grinder consists of rotating metal blades that reduce the size of degermed corn kernels as a result of impact.
Rotary blade/hammer mill-type
Degermed corn kernels are ground using pair/s of rollers made of steel that rotate in different directions.
Steel roller
A grinder that uses a pair of flat disks with series of grooves on the disk face. One disk rotates while the other disk remains stationary.
Attrition-type
Corn grits are sorted into different sizes by passing through sieves of different mesh sizes by reciprocating motion.
Oscillating
Corn grits are sorted into different sizes by passing through rotating sieves of different mesh sizes.
Rotary
What should be used in the manufacture of the different components of corn mill?
steel bars
metal sheet or plate
Maximum allowable noise level for Corn Mill?
100 dB (A)
Main product recovery for corn mill
55%
Maximum losses for corn mill
5%
Degermer efficiency
80%
Warranty for corn mill
one year
