Over 10,000+ customers' choice, Focus on screening industry 40+ years
Salt – the king of flavours. From the coarse grains of sea salt to the fine powder of refined salt, the form of every salt crystal is the result of careful processing. In the edible salt screening process, one often‑overlooked but far‑reaching problem has long plagued salt processors – particle breakage.
Salt is a crystalline particle composed primarily of sodium chloride, with a brittle crystal structure. During conventional vibrating screen operation, the equipment subjects material to high‑frequency, high‑amplitude mechanical vibration – causing salt particles to bounce on the screen surface. This intense motion creates continuous impact and abrasion on salt crystals. When intact salt crystals break, excessive fines are generated, reducing the uniformity and appearance of the finished product. High fines content affects salt flowability, causing packaging blockages. For industrial salts requiring specific particle sizes, breakage means product downgrading or even scrappage. In large‑scale production, the cumulative effect of these losses is significant.
There is an inherent conflict between the "high‑frequency vibration" of conventional screens and the "brittleness" of salt. Conventional rotary vibrating screens and linear vibrating screens rely on high‑frequency vibration to make material bounce on the screen surface, using inertial force to push fine particles through the mesh. This method does achieve relatively high screening efficiency. However, for crystalline particles like salt, the impact force from high‑frequency vibration acts directly on the crystal surface – particles collide with each other and rub violently against the screen mesh. Intact crystals develop cracks from repeated impact until they break. The higher the vibration intensity, the higher the breakage rate. Increasing vibration intensity to pursue higher throughput further exacerbates breakage. This conflict is difficult to reconcile on conventional vibrating screens.
For salt screening, protecting particle integrity is a fundamental requirement. Whether it is refined salt sold directly to consumers as a seasoning or industrial salt used as a food processing ingredient, particle integrity and uniformity are important indicators of product quality. Screening equipment must minimise damage to salt crystals while maintaining screening efficiency.
Gaofu Machinery's salt tumbler screen draws inspiration from a simple yet effective reference – manual hand screening. The action of hand screening is "rocking" and "swaying" – holding the screen frame with both hands and moving it back and forth, left and right, at a gentle rhythm. Material rolls, disperses, and stratifies on the screen surface, with fines naturally passing through the mesh. This action is effective because it is gentle – material moves on the screen surface without agitation, giving fines sufficient time to find and pass through mesh openings while coarse particles gradually move to the screen edges.
Gaofu's salt tumbler screen does precisely reproduce the motion logic of hand screening with mechanical precision. The equipment's fundamental gyratory motion closely resembles manual screening. An eccentric mechanism drives the screen surface in uniform circular motion, combining both "screening" and "winnowing" actions. The instantaneous motion of material on the screen surface is the synthesis of radial displacement and circular motion around that displacement – spiral motion. Material follows an involute spiral trajectory on the screen surface, allowing it to travel a relatively long path across the available area.
Like hand screening, the tumbler screen operates with low‑frequency, gentle, and controlled motion. Eccentricity can be adjusted from 25 to 40 mm, and rotational speed from 120 to 360 rpm. Material on the screen surface remains in a "controlled rolling" state, rather than "uncontrolled bouncing." The key difference is: vibrating screens make material "bounce," while tumbler screens make material "roll." This difference means salt crystals on the tumbler screen are subjected to far less impact force than on vibrating screens. Material moves slowly across the screen surface, reducing particle‑to‑particle and particle‑to‑screen collisions, thus preserving particle morphology.
The low breakage rate achieved by the hand‑screening mimicking design delivers multiple benefits in actual salt screening applications:
Improved finished product appearance. Intact salt crystals are uniform with distinct edges, appearing crystal clear. The gentle screening action of the tumbler screen effectively prevents secondary breakage, significantly reducing the broken salt rate and greatly enhancing the appearance and value of finished salt. For refined salt, sea salt, and other products targeting premium markets, particle integrity directly determines market positioning.
More concentrated particle size distribution. Conventional vibrating screens generate excessive fines due to particle breakage, resulting in broad particle size distribution. The tumbler screen's low breakage rate produces more concentrated salt particle sizes, with higher purity for each specification grade, effectively eliminating size mixing and cross‑contamination.
Screening efficiency and accuracy achieved simultaneously. Because material motion on the screen surface is more orderly and stratification is more complete, the tumbler screen achieves screening efficiency of 90%‑99%. Screening accuracy, efficiency, and screen life are all 5‑10 times that of conventional circular screens. Protecting particle integrity does not come at the cost of screening efficiency – this is the subtle advantage of the hand‑screening mimicking design.
Reduced material loss. Fines generated by breakage are not just a quality issue – they represent direct economic loss. Intact particles that could have been sold as finished product become fines that require reprocessing or downgraded sale. The tumbler screen's low breakage rate means more material is output as qualified product, improving raw material utilisation. In screening fragile materials such as salt, sugar, and urea granules, breakage rate can be controlled within 1%.
Gaofu's hand‑screening mimicking salt tumbler screen is suitable for various salt products where particle integrity is important – refined edible salt, sea salt, low‑sodium salt and fortified salt, and industrial crystalline salt. In screening fragile materials such as salt, sugar, and urea granules, the tumbler screen, with its core technical advantages of hand‑screening mimicking principle, low‑frequency gentle motion, and spiral progressive screening trajectory, controls particle breakage rate at low levels, providing salt processors with screening equipment that balances screening efficiency and particle integrity.
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.
