In beans processing, impurities have always been a key factor hindering quality improvement. Besides magnetic impurities like iron filings and nails, soil-borne impurities like dirt and sand are equally problematic. These impurities not only affect the color and taste of the beans but can also carry harmful substances like bacteria and insect eggs, posing a potential food safety risk.
1、A Brief Introduction to Magnetic Separators
A magnetic separator, or simply a magnetic separator, as the name suggests, uses magnetic force to remove dirt and is primarily used to remove dirt from grain.
The iron contained in soil is not free, elemental iron, but rather iron compounds. However, many iron compounds are ferromagnetic, giving soil a certain degree of ferromagnetism. Therefore, a magnetic separator utilizes this magnetic property to remove clumps of impurities.
2、Advantages of Magnetic Separators
The device features a high-performance magnetic separation module. Its multiple built-in sets of strong magnetic rollers generate a gradient magnetic field, precisely capturing magnetic impurities such as iron filings and iron sand from mung beans, with an adsorption rate exceeding 99.5%. A multi-layer vibrating screen classifies and separates the mung beans based on their particle size differences from sand and soil, completely separating larger dirt particles.
The magnetic separator features a user-friendly design: the feed port is convenient for feeding raw materials and easy to clean. The machine body is constructed of food-grade stainless steel, which is corrosion-resistant and easy to clean, meeting food processing hygiene standards.
3、Working Principle and Influencing Factors of a Magnetic Separator
During operation, the material moves along a belt. As the belt rotates around the magnetic rollers, the material undergoes a parabolic free fall. During this process, soil clumps are attracted by the high-strength magnets, causing their trajectory to change and be separated by the separators.The material is fed into the feeding hopper, enters the grain box through the elevator and the tee, and then is evenly distributed on the conveyor belt through bulk grain. Under the transportation of the conveyor belt, the material passes through two rows of filtering magnets and magnetic rollers and is thrown flat and scattered (to remove the strong magnetic iron impurities in the material and prevent the iron impurities from contacting the magnetic rollers and damaging the conveyor belt), forming a flat throwing surface. Since the soil particles contain ferromagnetic substances and are magnetic, their trajectory will change after passing through the magnetic rollers. Therefore, the material can be separated from the soil particles through the diver plate and finally enter the grain outlet and soil outlet of the grain box respectively.
To effectively separate soil, a magnetic separator requires many precise details, such as controlling the thickness of the parabola, ensuring the penetration of the magnetic field lines into the grain layer, and optimizing the drop height and belt speed.
The widespread application of magnetic separators will promote the transformation of the bean processing industry towards “efficiency, cleanliness, and quality,” providing strong support for ensuring the safety of bean products and enhancing the industry’s competitiveness, thereby helping the grain processing industry move towards a higher level of quality development.
Post time: Aug-22-2025
