In the processing of soybeans and mung beans, the main role of the grading machine is to achieve the two core functions of “removing impurities” and “sorting by specifications” through screening and grading, providing materials that meet quality standards for subsequent processing (such as food production, seed selection, warehousing and transportation, etc.)
1、Remove impurities and improve material purity
Soybeans and mung beans are easily mixed with various impurities during harvesting and storage. The grading screen can efficiently separate these impurities through screening, including:
Large impurities: such as soil blocks, straw, weeds, broken bean pods, large seeds of other crops (such as corn kernels, wheat grains), etc., are retained on the screen surface and discharged through the “interception effect” of the screen;
Small impurities: such as mud, broken beans, grass seeds, insect-eaten grains, etc., fall through the screen holes and are separated through the “screening effect” of the screen;
2、Classify by particle size to achieve material standardization
There are natural differences in the particle sizes of soybeans and mung beans. The grading screen can classify them into different grades according to the particle size. Its functions include:
(1)Sorting by size: By replacing the screens with different apertures, the beans are sorted into “large, medium, small” and other specifications.
Large beans can be used for high-end food processing (such as whole-grain stewing, canned raw materials);
Medium beans are suitable for daily consumption or deep processing (such as grinding soy milk, making tofu);
Small beans or broken beans can be used for feed processing or making soybean powder to improve resource utilization.
(2)Screening high-quality seeds: For soybeans and mung beans, the grading screen can screen out beans with full grains and uniform size, ensuring consistent seed germination rate and improving planting results.
3、Provide convenience for subsequent processing and reduce production costs
（1）Reduce processing losses: The beans after grading are of uniform size, and are heated and stressed more evenly in subsequent processing (such as peeling, grinding, and steaming), avoiding over-processing or under-processing (such as too many broken beans and unripe beans remaining) due to particle differences;
（2）Increase product added value: The beans after grading can be priced according to grade to meet different market demands (such as the high-end market’s preference for “uniform large beans”) and improve economic benefits;
（3）Simplify subsequent processes: Screening and grading in advance can reduce the wear of subsequent equipment (such as peeling machines and crushers) and reduce maintenance costs.
The essence of the grading screen’s role in soybeans and mung beans is “purification + standardization”: it removes various impurities through screening to ensure the cleanliness of the material; and sorts the beans according to specifications through grading to achieve refined utilization of the material.
Post time: Jul-28-2025
