Over 10,000+ customers' choice, Focus on screening industry 40+ years
Soybean meal, as a major raw material in feed formulations, faces the following practical challenges during screening:
High impurity content requiring effective removal. During processing, transport, and storage, soybean meal may become contaminated with stones, twine, metal filings, woven bag debris, and other foreign matter. If these impurities enter subsequent batching stages, they not only affect feed quality but can also damage mills, mixers, and other equipment. Screening equipment must have reliable impurity removal capability to intercept all types of foreign matter before they enter the production line.
Lumps and oversized particles must be separated. Soybean meal may form lumps due to moisture absorption during storage, or contain oversized particles generated during grinding. If these lumps and oversized particles are not effectively separated, they will directly affect feed mix uniformity and animal digestibility. Screening equipment must clearly separate合格 powder from lumps and oversized particles.
Large throughput – must match large‑scale production rhythm. Modern feed production lines require high throughput of soybean meal. Screening equipment must have sufficient capacity and operate stably to avoid becoming a bottleneck for the entire production line.
Premix screening is far more difficult than screening ordinary feed ingredients, mainly in the following aspects:
Extremely fine materials with high grading accuracy requirements. Premix particle sizes are typically very fine (20‑200 mesh) and contain valuable active ingredients. Insufficient screening accuracy can lead to uneven distribution of micro‑ingredients, affecting the quality stability and safety of entire batches. Equipment must achieve high‑precision screening while avoiding over‑grinding of particles, preserving the integrity of every micro‑ingredient.
Prone to blinding – affecting continuous production. Premixes are highly susceptible to screen blinding due to moisture or static electricity. Conventional screening equipment processing these materials often requires stoppages for cleaning after short operating periods, severely restricting continuous production. Equipment must be equipped with effective screen cleaning devices to fundamentally address blinding.
Strict hygiene and safety requirements. As a core ingredient added directly to feed, premixes place strict requirements on equipment materials and cleanliness. Equipment must be made of food‑grade stainless steel, with dead‑corner‑free, easy‑to‑clean structures, and must operate without dust emission to prevent cross‑contamination.
Gaofu's S49 series multi‑deck rotary vibrating sieve uses a vertical vibration motor as the excitation source. Eccentric weights installed at the top and bottom of the motor convert rotary motion into a three‑dimensional compound motion (horizontal, vertical, and inclined), which is transmitted to the screen surface. Material spreads outward on the screen surface in a circular spiral path, travelling a relatively long screening distance across a relatively small screening area. By adjusting the phase angle of the upper and lower eccentric weights, the material's movement trajectory and residence time on the screen can be flexibly changed to suit different materials such as soybean meal and premixes.
The core value of the multi‑deck structure is integrating multiple stages – impurity removal, coarse grading, fine grading, and safety screening – into a single machine. Material enters from the top feed port and passes through each deck sequentially – the upper deck intercepts large lumps and foreign matter, the middle decks achieve different particle size fractions, and the lower deck acts as a safety screen to ensure finished product purity. One feed completes multiple screening stages, reducing material transfers between machines and cross‑contamination risks.
Gaofu's S49 series multi‑deck rotary vibrating sieve supports flexible configurations of 1 to 5 screen decks , enabling a single machine to produce 2 to 6 different particle size fractions simultaneously. To address the different screening requirements of soybean meal and premixes, the multi‑deck structure provides differentiated configuration options:
Typical soybean meal screening configuration: 2‑3 screen decks. The upper deck (coarse screen, approx. 10‑20 mesh) intercepts stones, twine, large lumps, and other obvious foreign matter; the middle deck (medium screen, approx. 20‑40 mesh) separates合格 soybean meal powder; the lower deck (fine screen) acts as a safety screen to further intercept fine impurities. Two or three decks are sufficient for soybean meal impurity removal and coarse grading, with classification efficiency reaching 90% to 98%.
Typical premix screening configuration: 3‑5 screen decks. The upper deck (coarse screen) intercepts large impurities and lumps from raw materials; the middle decks (20‑200 mesh, adjustable) achieve fine grading, precisely separating premixes by particle size; the lower deck (fine screen) acts as a safety screen to ensure finished product purity. For production lines requiring multiple premix particle size specifications, multi‑deck configurations can produce several grades in a single feed.
The most common challenges in premix screening are blinding and lumping. Gaofu's S49 series multi‑deck rotary vibrating sieve provides solutions across multiple levels:
Bouncing ball cleaning system – physical knocking for real‑time anti‑blinding. Bouncing balls are installed between the screen and the support plate – during operation, they continuously bounce and knock against the screen surface, dislodging fine powder adhering to the screen and particles wedged in the mesh. This standard design is suitable for conventional premix screening, effectively reducing blinding frequency.
Ultrasonic cleaning system – breaking electrostatic adhesion for ultra‑fine powder blinding. For ultra‑fine premixes (typically above 100 mesh), electrostatic adhesion is the primary driver of blinding. Gaofu's S49 series can be equipped with an ultrasonic cleaning system – an ultrasonic generator is added to the conventional rotary vibrating sieve, producing high‑frequency, low‑amplitude mechanical energy that effectively disrupts electrostatic adhesion and agglomeration between powder particles. This technology allows ultra‑fine powders to pass through the screen easily, fundamentally solving screen blinding.
Pre‑breaking device – breaking lumps to eliminate blinding at the source. For premixes prone to moisture absorption and lumping (such as certain mineral additives), Gaofu can install a pre‑breaking unit at the feed inlet – high‑speed rotating breaking rods pre‑break lumps before they enter the screening zone. This design prevents large material from directly impacting and damaging the screen mesh while improving screening efficiency.
Separate mother‑screen / fine‑screen design – extending screen life and reducing maintenance costs. Gaofu's S49 series features a unique mother‑screen and fine‑screen separation design – the mother screen fully supports the working fine screen, which does not directly bear the impact of the material. This design significantly extends screen service life, with screen changes taking only 3‑5 minutes. For production lines requiring frequent product changeovers, quick screen change capability significantly reduces downtime.
Both soybean meal and premixes are feed ingredients, placing strict requirements on equipment materials and hygiene standards:
Food‑grade 304 stainless steel. All material‑contact parts are made of 304 food‑grade stainless steel (316L available on request), offering excellent corrosion resistance and complying with feed and food additive hygiene standards. Surfaces are polished – with no dead corners, no exposed bolts, easy to disassemble and thoroughly clean – effectively preventing cross‑contamination.
Fully enclosed structure – eliminating dust emission. The equipment features a fully sealed structure with efficient dust‑proof flexible connections, ensuring material is processed in a closed environment. For high‑value, dust‑prone materials like premixes, the fully enclosed design not only meets environmental production requirements but also protects workshop cleanliness and operator occupational health.
Food Industry Client Testimonials
Nestlé, CP Group, Haitian Flavour & Fragrance, Yihai Kerry, Yili, Mengniu,Shuanghui, Wahaha, Master Kong, Want Want, Anjoy Foods, Angel Yeast,Yangyuan Foods, Uni-President Enterprises, Qiaqia Food, Luhua Group,Alpenliebe, Golden Monkey, Orion, Xizhilang,Sanquan Foods, Synear Food, Oishi, Wong Lo Kat, Yanjing Beer, Seamild,Jinpai, Chubang, Hengshun Vinegar Industry, Longda Group, Beijing Daoxiangcun, Anhe Dairy,Weiwei Group, Xiangpiaopiao, Maiquer, Tianbing, Binqi Food, Ligao Okun
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CNPC、CSCEC、Sinochem Holdings、CRCC、China Minmetals Corporation、CNOOC、CR、Sinopharm、CHN Energy、COFCO Corporation、Huawei Technologies、PowerChina、CITIC Group、Wuchan Zhongda Group、NORINCO、Chalco、CNBM、 Shaanxi Coal and Chemical Industry Group、Ansteel Group、CETC、CSSC、CASC、CEC、Jinchuan Group、CASIC、Conch Cement、CNNC、SPH、Shanxi Coking Coal Group、 Zhongtai Chemical、GPHL、DEC、Sinosteel Corporation、MCC、China National Salt Industry Chemical、China Baowu Steel Group、China Animal Husbandry Industry Co., Ltd.、CECEP
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.
