Over 10,000+ customers' choice, Focus on screening industry 40+ years
In modern salt production lines processing hundreds of tonnes or more per day, screening equipment faces several problems that conventional vibrating screens struggle to avoid:
Throughput bottlenecks are evident. Conventional vibrating screens aim for "particle‑by‑particle screening" – every salt particle must bounce repeatedly on the screen surface to find a mesh opening. When the material bed is thick and throughput is high, material congestion inevitably occurs, and screening efficiency drops sharply. In coarse screening of manufactured sand and dry mortar, single‑machine capacity of conventional screens often gets stuck at 50‑60 tonnes/hour. For salt processing, which also requires large‑volume continuous screening, this bottleneck is equally present.
Frequent blinding affects continuous operation. Salt crystals are cubic in shape and can easily become wedged in mesh openings during screening, causing blinding. Conventional screens processing materials with high fines content often require cleaning every 2‑4 hours. Frequent stoppages not only reduce throughput but also increase labour costs.
Short screen life and high maintenance costs. During long‑duration continuous operation, conventional vibrating screens experience rapid screen wear and require frequent replacement. Each screen change means production interruption and labour input.
Large equipment footprint limits line layout. To achieve target throughput, some plants choose multiple screens in parallel. But multiple machines mean more floor space, more complex air duct layout, and more maintenance points.
The GLS series salt probability screen differs fundamentally from conventional vibrating screens in its underlying logic.
Conventional vibrating screens operate on a logic similar to "individual inspection" – each particle must bounce repeatedly on the screen surface to find a mesh opening. When the material bed is thick and throughput is high, congestion naturally occurs. The probability screen uses a completely different logic: increasing the probability of passage and shortening the material's residence time on the screen surface.
This logic is achieved through three core design features:
High‑inclination screen surface. The screen surface inclination of the probability screen is far greater than conventional screens (typically 20° to 60°, compared with 0°‑15° for conventional screens). The high inclination gives material high initial velocity at the feed end – the material bed rapidly thins and moves forward quickly. Salt particles move rapidly across the screen surface like "riding a slide" – fine particles have sufficient opportunity to pass through quickly, while coarse particles are discharged rapidly.
Large‑aperture screen mesh. The screen aperture is typically designed at 1.2 to 2.2 times the separation particle size. Because the mesh openings are larger than the target particles, particles are less likely to become wedged – greatly reducing blinding probability and ensuring throughput per unit time. This is not a compromise on accuracy – it is "screening fine material with large holes" – as long as the target particle size can pass through.
Multi‑deck screen configuration. The equipment can be configured with 2 to 5 screen decks for one feed and multiple discharges. Salt passes through each deck sequentially from coarse to fine – coarse salt, medium salt, fine salt, and ultra‑fine salt powder are produced simultaneously in one feed. Gaofu's GLS series probability screen covers screening mesh from 5 mm down to 0.075 mm (200 mesh) .
Based on the probability screening principle, Gaofu's probability screen is designed with mesh openings 1.2‑2.2 times the target separation particle size. Combined with high‑frequency excitation force generated by dual vibrating motors operating in synchronised opposite directions, material disperses rapidly and moves forward in a directional bouncing motion upon entering the screen.
Gaofu's GLS series salt probability screen offers the following core technical features for salt screening applications:
Large single‑machine throughput for high‑capacity salt production scenarios.
In coarse sand screening of manufactured sand and natural sand, the probability screen achieves 3‑6 times the throughput of conventional screens, with single‑machine hourly throughput reaching 10‑300 tonnes. For salt processing, this means a single probability screen can match the screening requirements of high‑capacity salt production lines – no need for multiple machines in parallel. Gaofu's GLS series probability screen covers production capacity of 15‑500 tonnes/hour.
High‑inclination design for rapid material passage without accumulation.
The probability screen uses a high‑inclination screen surface (above 20°) – material flow velocity is significantly higher than conventional screens. Salt particles move rapidly across the screen surface with the material bed quickly thinning – fine particles are no longer "buried" and screening efficiency improves significantly. Gaofu's GLS series probability screen screen inclination can be adjusted within 15° to 30° according to material characteristics.
Large‑aperture screen mesh effectively reduces blinding frequency.
Because the screen aperture is designed at 1.2‑2.2 times the separation particle size, salt particles are less likely to become wedged in mesh openings. Combined with high‑frequency low‑amplitude vibration and self‑cleaning screen surfaces, this effectively alleviates wedging caused by irregular particle shapes. Cleaning intervals are significantly extended, reducing manual screen cleaning frequency.
Multi‑deck grading – multiple specifications from one feed.
Supporting 2‑5 flexible screen deck configurations, a single machine can simultaneously produce 2‑5 different particle size specifications of salt. Coarse salt, medium salt, fine salt, and ultra‑fine salt powder are produced simultaneously in one feed – no need for multiple screening passes or machines in series.
Long screen life and low maintenance costs.
The probability screen features an arched screen surface design that disperses impact forces by changing the material impact point angle. The external ratchet tensioning device allows operators to easily adjust screen tension from the outside, ensuring the screen remains flat at all times. Under normal operating conditions, continuous screen service life can be maintained for over 60 days. Front and rear discharge ports use detachable design, making screen replacement relatively simple.
Fully enclosed structure improves workshop environment.
The equipment features a fully enclosed box structure with a dust extraction port on the top for direct connection to the site dust collection system. For salt processing, this design effectively controls salt dust emission, improves the workshop environment, and reduces material loss.
Wide application range for multiple salt products.
Gaofu's GLS series probability screen is widely used for grading granulated white sugar, raw salt, and edible salt. Whether for sea salt, lake salt, rock salt, or refined salt, suitable screen configurations are available.
The high‑inclination, high‑efficiency design of Gaofu's salt probability screen delivers multiple practical improvements for high‑capacity salt production:
Throughput bottlenecks are broken. A single probability screen achieves 3‑6 times the capacity of conventional screens. For salt production lines processing hundreds of tonnes per day, a single probability screen matches the capacity rhythm of the entire line – no need for multiple machines in parallel. The screening stage no longer becomes the "weak link" constraining the efficiency of the entire production line.
Continuous operation capability is significantly enhanced. The large‑aperture design and self‑cleaning screen surfaces effectively reduce blinding frequency. The equipment can run continuously for extended periods, reducing stoppages caused by blinding. For salt production lines requiring 24‑hour continuous operation, this means higher equipment utilisation and more stable output.
Screen replacement frequency is reduced, and maintenance costs are controllable. The arched screen surface design and external ratchet tensioning device significantly extend screen service life. Fewer screen changes mean less downtime and lower labour costs.
Workshop environment is improved. The fully enclosed box structure with dust extraction port effectively controls salt dust emission. Dust concentration in workshop air is reduced, operator working conditions are improved, and material loss is simultaneously reduced.
Production line layout is simplified. A single probability screen replaces the capacity of multiple conventional screens – reducing equipment floor space and air duct complexity. The production line layout is simpler with fewer maintenance points.
Food Industry Client Testimonials
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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.
