Corn deep processing technology methods and steps

Corn can be made into various delicious foods only after certain processing technology. So today I will tell you about the deep processing technology of corn:

1. Corn Process

Raw materials → screening → peeling, degerming → adding water and stirring → molding → cooling → drying → screening → finished products → packaging

2. Key points of corn operation

(1) Material selection

Choose corn with full kernels, no mold or insect infestation, and high keratin content as the raw material. Either yellow or white corn will do.

(2) Cleaning

Remove all kinds of impurities such as stones, iron wire, and straw sticks from the corn, and sieve it through a 6mm diameter sieve to remove small corn grains and soil, so that corn with uniform kernel size can be obtained. It is best to use a cleaning machine for this process, which can save labor and obtain high-quality corn kernels.

(3) Peeling and degerming

The cleaned corn is first conditioned by soaking it in hot steam or hot water above 90°C for 3 to 5 minutes. The corn is then crushed with a rice mill or a horizontal germ remover, and the corn germ and husk fall off and are removed with a winnowing machine. The corn husk is processed into fine cornmeal with a steel mill.

(4) Add water and stir

Add an appropriate amount of water to the cornmeal and stir it evenly in a blender for at least 15 minutes to allow the water to completely penetrate into the starch granules.

(5) Molding

This is the key process of processing corn. The evenly mixed corn flour is directly put into the corn forming machine, and then heated, extruded and expanded. At the outlet of the extruder, it is continuously cut into rice-like particles by the cutting knife. The speed of the cutting knife must be adjusted appropriately, otherwise the corn will be either too long or too short. The shape of the corn should be as similar as that of rice as possible.

(6) Drying

The corn rice coming out of the forming machine still has a high moisture content and is easy to stick together. It must be cooled to loosen the sticky rice grains and then put into the dryer for drying. The temperature in the dryer is controlled at around 200℃ and dried to a moisture content of less than 5%.

(7) Screening

Use a sieve with a pore size of 1.5 mm to remove powder, broken rice, large particles and sticky grains to make the rice grains neat and uniform.

(8) Packaging

The screened corn is immediately packaged in plastic bags, and the packaging specifications are determined according to needs. Wheat flour, bean flour and other grain flours can be added to corn flour to make "nutritious rice" rich in various nutrients.