How is corn oil squeezed, and can corn be squeezed into oil?

According to the difference in water absorption power of endosperm and germ, the corn husk and germ absorb water, the germ has strong water absorption, expands in volume after water absorption, increases toughness and elasticity, and is not easy to break when breaking grits and pressing grits, making it easy to break away from the embryo; After the corn husk absorbs water, it is easy to peel, and at the same time, it is conducive to separation from the embryo and reduces the phenomenon of embryo skin or skin skin. This improves the embryo rate and the purity of the germ. The wetting time is 5 to 8 minutes, but the amount of watering varies depending on the size of the original water.

After the corn is moistened, the corn is then peeled and broken. The peeling and grits breaking equipment adopts a horizontal grinding roller rice machine or a square rice machine. In the operation, the degree of peeling and fragmentation of each channel should be strictly controlled, so that the germ does not have skin and the skin does not have germ.

The grits are broken by a horizontal three-section grinding roller rice machine, which crushes the peeled corn into several petals, and with the crushing of the corn, the germ is separated from the endosperm in large quantities. Sorting and extracting embryos take the embryo lifting machine to sort and extract the embryo, that is, the specific gravity of grits and embryos is different, the specific gravity of grits is gram cm 3, the specific gravity of the embryo is gram cm 3, and the specific gravity stone removal machine is changed to corn embryo extraction machine. The principle is to use the tilting movement of the sieve plate with the fish scale hole of the tilting device, and under the action of the inclined air flow that passes through the fish scale hole from the bottom up, the embryo and grits are separated.

The germ has a small specific gravity and is blown up by the air flow, which is suspended, floating in the upper layer, and flowing out to the low end of the sieve surface under the pressure of imported materials and its own gravity; However, the grits with a large proportion still adhere to the sieve surface and crawl high through the back of the fish scale orifice plate to the grits outlet. By adjusting the height of the grits and embryo baffles, the separation effect can be effectively controlled. The extracted germ is then air-screened and winnowed, and the bran in the embryo is sucked to improve the purity of the embryo.

Embryo pressing and screeningAfter separation, the embryo still contains grits, which can be used to enter the mill to press the embryo, and then the embryo is screened by the flat. Purification must be cleaned with a vibrating screen before pressing, and impurities such as grit, powder, and bran in the germ must be sieved to improve the purity of the germ as much as possible. The moisture of dried corn germ is generally 11 15%, and its suitable water content is less than 4%, which must be thermally dried on the extracted germ, so that the germ moisture reaches less than 4% before it can be pressed.

The drying methods used include fire drying, steaming and wok-removing water, and mechanical drying. Most of the screw presses used in the press are 95 and 200 types. It is equipped with roasting equipment to ensure the extraction of the germ.

Authentic corn oil is made from corn germ, which is a small bud wrapped in a depression in the root of the corn kernel. Feed enterprises or food enterprises first strip the corn germ from the corn kernel by technical means, and then it can be transferred to the oil pressing equipment for pressing to obtain corn oil.

Corn oil is refined by dephosphorization, deacidification, degumming, decolorization, deodorization and dewaxing on the basis of corn refined oil. Corn oil is clear and transparent, fragrant and has a high smoke point, making it ideal for quick stir-frying and frying of foods.

Corn oil, also known as corn oil and corn germ oil, is an oil extracted from corn germ. The fat content of corn germ is between 17% and 45%, accounting for more than 80% of the total fat content of corn. The fatty acids in corn oil are characterized by an unsaturated fatty acid content of up to 80% to 85%.

Corn oil itself does not contain cholesterol, it has a dissolving effect on the accumulation of cholesterol in the blood, so it can reduce the sclerosing effect on blood vessels. It has a positive prevention and treatment effect on senile diseases such as arteriosclerosis and diabetes. Due to the function of natural complex vitamin E, it has obvious curative effect and preventive effect on heart disease, thrombophlebitis, reproductive dysfunction, muscular dystrophy, and nutritional encephalomalacia.

Some elderly people consume a spoonful of corn oil every day on an empty stomach as a tonic.

Corn can be pressed for oil.

1. Corn oil extraction is not a direct extraction of corn seeds. Rather, it is the part of the corn seed that is pressed on top of the germ called the germ.

2. The oil content of corn is very low, that is, 3-4%, it is difficult to extract without separation, and corn oil is generally an additional product, and the corn produced by germ is good for starch, and the corn ballast and cornmeal produced are delicious and resistant to storage.

The linoleic acid content of corn reaches 2%, which is the highest content in cereal feed. If the proportion of corn in the diet reaches more than 50%, corn alone can meet the linoleic acid requirement of pigs and chickens (1%). Modern research has confirmed that corn is rich in unsaturated fatty acids, especially linoleic acid, which has a synergistic effect with vitamin E in corn germ to reduce blood cholesterol concentration and prevent it from being deposited in the blood vessel wall.

Therefore, corn has a certain preventive and advanced effect on coronary heart disease, atherosclerosis, hyperlipidemia and hypertension.

Corn should not be extracted directly from oil. Corn oil is extracted, and most of the corn germ is pressed or leached. Corn oil is mostly a by-product of starch production in starch factories.

Corn can be used to extract oil, but corn oil is not directly extracted from corn seeds, but by extracting the part of corn seeds called germ.

Corn oil content is very low, that is, 3-4%, it is difficult to extract without separation, but corn oil is generally an incidental product, and the corn produced by germ is good for starch, and the corn ballast and cornmeal produced are delicious and shelf-stable.

Difference Between Corn Oil and Soybean Oil.

1. Differences in taste and taste.

1) Corn oil: light taste, no peculiar smell.

2) Soybean oil: The color of refined soybean oil is yellow, and it smells like a special beany smell.

2. The applicable cooking methods are different.

1) Corn oil: It can be used for stir-frying, and is also suitable for cold vegetables, which is a nutritious and healthy edible vegetable oil.

2) Soybean oil: its thermal stability is relatively poor, and it will produce more foam when heated, which is not suitable for high-temperature frying.