The main process of wheat milling is to separate the endosperm from wheat embryo and wheat skin after cleaning and moisture regulation, and then grind the endosperm into powder. Through certain technology and equipment, the washed and prepared clean wheat will be processed into finished flour that meets the national standards. In this process, endosperm and wheat husk (pericarp and seed coat) need to be separated from the embryo and ground into powder.

Wheat seeds consist of endosperm, embryo and wheat husk. The percentage of each part by weight is: endosperm 82-85%, embryo 2-3%, wheat bran 12- 14%. Endosperm contains a lot of starch and some gluten composed of protein, which is the main raw material for making bread, cakes and other foods.

Development of wheat milling

In the Neolithic Age in China, the way to eat was to put grain on a big stone and roll it back and forth with a small stone in your hand. Later, there was a stone mill, which gradually developed from manpower to animal power, so the grinding industry continued to progress. During the period of 1795, American flour mills began to realize partial mechanization, and the wheat cleaning equipment was also innovated, but the main tool for milling was still stone mill.

By the19th century, marble, pig iron or magnetic soil rollers were used in Europe. /kloc-In the late 20th century, France used a flour cleaner to remove light wheat bran by wind, thus obtaining cleaner wheat residue powder. But it was not until the appearance of grinding roller, round screen and flat screen of steel mold cast iron that the flour industry took on a modern form. The first machine-made flour mill in China was Yizheng flour mill founded by German businessmen in 1894.

After 19 15, China's flour industry developed, but mainly concentrated in coastal areas. There are few wheat producing areas in the mainland, and the milling machinery basically depends on imports. After the founding of the People's Republic of China, domestic equipment has been used for flour processing.

Refer to the above content: Baidu Encyclopedia-Wheat Milling