满足生产效率的要求，粉碎麦芽的麦皮尽可能完整(提高过滤槽的渗透性，减少有害成分浸出）；淀粉原料的粉碎度达到一定的要求(便于糊化及 α- 淀粉酶的快速分解)。
Raw materials milling mode:
Including wet milling and moisture regain milling.
The milling is carried out after the malt absorbs water, so that the bran integrity is enhanced and the feeding bearing capacity on unit filtering area is improved. CO2 can be fed to isolate oxygen, improving mash charging speed and evenness of mixing. The instantaneous power load is high, so the requirement for milling time is high.
Moisture regain milling:
The moisture absorption by the malt is even and adjustable, so that the bran integrity can be maintained to the utmost extent after milling.
The materials after milling can be stored for a short period of time, which is beneficial to the connection of milling time and feeding time. The milling capacity is not required to be very high and the instantaneous power load is low.
Raw materials milling requirements:
To meet the requirement for production efficiency, the bran shall be integral whenever possible (enhancing the penetration of filter tank, and reducing leaching of harmful contents). The milling degree of starch raw materials shall meet certain requirements (for the convenience of gelatinization and rapid decomposition of α-starch).
Raw materials controlling requirements:
Accurate and reliable material water ratio, pH online adjustment, controlled through frequency converter, automatic control.