Over 10,000+ customers' choice, Focus on screening industry 40+ years
Protein molecules contain hydrophilic groups. After spirulina powder absorbs moisture under ambient humidity, liquid bridges form on the particle surfaces, generating contact tension between particles and between particles and screen wires. Static charge generated by friction during dry screening causes fine powder to be adsorbed onto the screen surface and stainless steel screen wires, further reducing the effective screening area. At the same time, algae powder with relatively low specific gravity struggles to gain sufficient downward acceleration under conventional vibration conditions, and fine powder tends to “suspend” on the screen surface rather than penetrate. These three mechanisms combine to produce progressive embedding of apertures by fine powder and agglomerates, and screening degrades from a continuous process into intermittent clog-clean-reclog cycles.
How bouncing balls intervene: breaking adhesion conditions from the underside of the mesh
The bouncing-ball screen-cleaning device of the rotary vibratory sieve does not act on the material itself; it applies mechanical intervention from the underside of the screen mesh. High-elasticity rubber balls are placed on a ball support plate beneath the screen mesh. The three-dimensional vibration of the screen box drives the bouncing balls in high-frequency irregular rebounds within the ball chamber, continuously striking the underside of the working screen mesh. When a bouncing ball strikes the mesh, the instantaneous mechanical shock wave pushes临界-sized particles already lodged in the apertures back out; the vibration generated by continuous impact breaks the liquid bridges and contact tension between particles and between particles and screen wires, shattering fine powder clusters adsorbed on the interwoven nodes of the mesh.
The key to this intervention lies in “continuous” action and “from the underside.” If screen cleaning depends on manual tapping or brushing after shutdown, the screening process has already been interrupted. Bouncing balls work without interruption during operation, keeping the screen mesh apertures open during continuous running rather than waiting until they are completely blocked before attempting recovery. Gaofu rotary vibratory sieves’ publicly available product information describes this configuration as “built-in high-elasticity rubber bouncing balls that continuously strike the underside of the screen mesh during vibration, effectively alleviating fine powder agglomeration and aperture clogging,” and notes that an ultrasonic screen-cleaning system can be optionally configured for particularly adsorption-prone materials as a supplement to mechanical bouncing.
Once adhesion is suppressed, classification performance returns to screening itself
The classification requirement for spirulina powder is usually to obtain a relatively narrow distribution within the target particle-size range. When bouncing balls release the screen surface from the coverage of fine powder and agglomerates, the effective open area of the apertures is restored, and only then can fine particles pass through or be retained normally according to the geometric relationship between particle size and aperture size. Gaofu S49 series rotary vibratory sieves support 1 to 5 screen deck configurations, with aperture accuracy covering 8–0.013 mm (2–500 mesh); publicly available information gives a screening efficiency range of 95%–99%. The three-dimensional vibration of the rotary vibratory sieve causes material to spread outward on the screen surface in an involute spiral. The material layer periodically loosens under vertical acceleration, fine particles gain the opportunity to settle toward the bottom layer of the screen surface and align with the apertures, while coarse particles are discharged toward the edge along the spiral trajectory. What bouncing balls address is “keeping the screen surface from being occupied by adhesion,” while classification accuracy itself is borne jointly by the vibration trajectory, material layer dynamics and screen configuration. The two are a division of labor, not a substitution relationship.
As a raw material for food or health products, spirulina powder requires that enclosure and material compliance at the screening stage are not optional additions. Gaofu rotary vibratory sieves use 304 stainless steel (316L optional) for material-contact parts, with mirror-polished surfaces; seals are food-grade silicone, and the fully enclosed structure prevents dust escape. Bouncing balls themselves are consumables that directly contact the underside of the screen mesh, and their rebound rate and wear resistance need to be confirmed during incoming inspection to avoid weakened screen-cleaning performance caused by bouncing balls becoming smaller or losing elasticity through wear. The quick-release clamp ring design allows screen replacement and routine cleaning to be completed in a relatively short time without professional tools. For production lines that need to handle different batches of algae powder frequently, this structural condition determines whether screen-cleaning intervention can be effectively carried out during changeover intervals.
Boundaries that need to be stated clearly
The suppression of fine powder adhesion and mild agglomeration by bouncing-ball screen cleaning is an engineering measure with a clear physical mechanism in spirulina powder screening, but it does not change the moisture-absorbing nature of algae powder, nor does it replace humidity control in the production environment. For operating conditions with extremely strong stickiness or extremely high target mesh counts, ultrasonic screen cleaning is a supplementary option provided in publicly available information, and its mode of action differs from mechanical bouncing. What the equipment can do is to use continuous, repeatable mechanical intervention at the screening stage to slow the decline in screen surface permeability, so that the classification process runs under a relatively stable effective open area. For spirulina powder processing troubled by fine powder adhesion and screen blinding, this in itself already returns to the starting point of “classification performance.”
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About Gaofu
Xinxiang Gaofu Machinery Co., Ltd. was founded back in the 1980s. With over 40 years of development, it has been certified as a National-level Specialized, Refined, Unique & Innovative Little Giant Enterprise, National Green Factory, National High-tech Enterprise, and National Intellectual Property Advantage Enterprise, and serves as the President Unit of China Vibration Screening Industry Association.
The company is accredited with the Henan Provincial Industrial Design Center, Henan Provincial Engineering Technology Research Center for Intelligent On-line Screening System, and Xinxiang Municipal Engineering Technology Research Center for Fine Screening.
Gaofu has obtained more than 500 patents including invention patents, utility model patents and design patents, been awarded the Science and Technology Achievement Prize issued by the Ministry of Industry and Information Technology of China, and participated in drafting and formulating 4 national standards.
Gaofu's product portfolio covers multiple series and hundreds of specifications, including vibrating screening equipment, conveying equipment, coal crushing equipment, filtration equipment and automatic material handling systems.
Core products include vibrating screens, screening machines, vibratory sifters, rotary vibrating screens, ultrasonic vibrating screens, linear vibrating screens, airflow screens, gyratory screens, roller screens, dewatering screens, bar screens, vacuum feeding machines, dust-free feeding stations, bulk bag feeding stations, feeding systems, automatic powder feeding systems, automatic slag-discharging filters, leaf filters, clay filters, toothed roll crushers, coal crushers and other machinery.
These products are widely applied in food, pharmaceutical, chemical, metallurgy, construction materials, mining, thermal power, environmental protection and many other industries, winning recognition and trust from over 10,000 clients worldwide.
Gaofu products enjoy strong sales across Greater China, and are exported to more than 100 countries and regions such as Russia, Canada, the United States, New Zealand, Japan, Brazil and South Africa.
Upholding the corporate mission of Improving material quality & efficiency to fully satisfy customer demands, Gaofu maintains long-term partnerships with clients to achieve win-win development.
At present, Gaofu is an official qualified supplier for numerous Fortune Global 500 enterprises, including CNPC, Sinopec, Sinochem Holdings, China Resources Group, Sinopharm Group, COFCO, China National Building Material, China Aerospace Science and Technology Corporation, Jinchuan Group and more.
Gaofu Machinery ranks No.1 in global sales volume of vibrating screens.
In May 2024, Frost & Sullivan, a world-renowned international consulting firm, issued a Market Position Verification Certificate confirming that Gaofu achieved the world's largest shipment volume of vibrating screens in the global market in 2023.
