Over 10,000+ customers' choice, Focus on screening industry 40+ years
Screening operations in salt processing are far more than simply "passing through a screen" – they must meet production requirements across multiple dimensions:
Large throughput must match large‑scale production rhythm. Modern salt production lines process dozens of tonnes or more per day. Screening equipment must have sufficient capacity and run reliably to avoid becoming a bottleneck for the entire production line. Gaofu's SZF series linear vibrating screen achieves hourly throughput of up to 20 tonnes – a single machine matches the capacity rhythm of the entire line.
High grading accuracy eliminates size mixing and cross‑contamination. Different applications have strict requirements for salt particle size. Coarse salt contaminated with fines, or fine salt containing coarse particles – any size mixing means product downgrading, directly impacting profit margins. Screening equipment must deliver stable grading accuracy to ensure reliable purity for each specification grade.
Strict hygiene standards require food‑grade compliance. Salt is consumed directly – production equipment must meet food‑grade hygiene standards. All parts that contact salt should be made of food‑grade stainless steel to ensure no heavy metal contamination during screening.
Materials are corrosive – equipment must resist salt corrosion. Salt (sodium chloride) is corrosive to metals in humid environments. Equipment materials must have good corrosion resistance to prevent rusting or material contamination caused by salt corrosion.
The screening efficiency of Gaofu's SZF series salt linear vibrating screen comes from its unique working principle and multiple targeted design features:
Dual‑motor synchronous drive for orderly and efficient material movement. The linear vibrating screen uses dual vibrating motors operating in synchronised opposite directions – when the two motors run in opposite directions, the lateral excitation forces cancel each other out, while the longitudinal forces are transmitted to the entire screen box, generating stable linear vibration on the screen surface. Material is thrown up on the screen and moves forward in a straight line in a bouncing motion – particles smaller than the screen openings pass through to the lower layer, while oversize material travels along the screen surface to the outlet. This orderly linear motion allows material to disperse rapidly and stratify fully on the screen surface, significantly improving screening efficiency.
Flexible multi‑deck screen configuration – one feed, multiple outputs. The equipment supports flexible configurations of 1 to 5 screen decks arranged from coarse to fine. Material enters through the feed port and passes through each deck sequentially – coarse particles are retained on the upper deck, medium particles pass through the upper deck and are retained on the lower deck, and fine powder passes through all decks into the bottom hopper. A single machine can simultaneously produce 2 to 6 different particle size specifications of salt. One feed completes multi‑stage grading, significantly shortening screening time and increasing effective output per unit time.
Adjustable angle to suit different material characteristics. The equipment features an adjustable excitation angle – the screen surface inclination can be adjusted within a range of 0° to 7°. For free‑flowing salt particles, the angle can be increased to raise throughput; for materials with high fines content, the angle can be decreased to extend the screening path and improve grading accuracy.
Anti‑blinding design ensures consistent screening efficiency. Salt crystals are cubic in shape and can easily become wedged in mesh openings during screening, causing blinding. Gaofu's linear vibrating screen features proper anti‑blinding design that effectively reduces material blockage risk. The equipment's compact structure ensures smooth material movement on the screen surface, effectively preventing screening efficiency loss caused by blinding.
Finished product purity is the core indicator of salt quality. Gaofu's SZF series salt linear vibrating screen provides purity assurance across three dimensions: materials, structure, and accuracy.
Food‑grade stainless steel materials eliminate contamination at the source. All parts that directly contact salt are made of 304 or 316L food‑grade stainless steel. 316L stainless steel – with its high nickel and molybdenum content – offers excellent corrosion resistance, particularly suitable for handling chloride‑containing sea salt, preventing equipment rusting or material contamination caused by salt corrosion. The internal surfaces are finely polished to prevent dirt accumulation and bacterial growth. Seals are made of food‑grade silicone – non‑toxic and odourless – ensuring a pure, contamination‑free screening process that fully complies with GB/T standards and food GMP regulations.
Fully enclosed structure eliminates external contamination. The equipment features a fully enclosed design – the screening process takes place in a closed chamber, preventing fine salt dust from escaping. Good sealing ensures no dust emission, improving the workshop environment and preventing external impurities from entering the material. Impurities and oversize material are automatically discharged from the reject outlet, while on‑spec salt is precisely collected from the discharge port – reducing material waste.
High‑precision grading ensures purity for each specification grade. Gaofu's salt linear vibrating screen achieves screening accuracy of over 95%. Screened particles are uniform in size with high screening accuracy. The precise multi‑deck grading ensures purity of each particle size grade – no fines in coarse salt, no coarse particles in fine salt. The unique screen mounting structure effectively eliminates size mixing and cross‑contamination.
Effectively breaks lumps without damaging salt crystal structure. Salt may slightly cake during storage and transport due to moisture absorption. Gaofu's linear vibrating screen uses gentle physical screening to effectively break apart slightly caked salt grains caused by moisture absorption, without damaging the salt crystal structure. Lumps are naturally broken during screening – ensuring smooth screening while protecting salt crystal integrity.
Gaofu's SZF series salt linear vibrating screen is used in the following salt processing applications:
Raw material impurity removal: At the beginning of the salt production line, the linear vibrating screen removes impurities such as sand, stones, and shell fragments from raw salt, ensuring finished salt purity.
Particle size grading: Salt is separated into different specifications – coarse salt, medium salt, fine salt, ultra‑fine salt – according to particle size, meeting the requirements of different applications including food seasoning and industrial salt.
Refined salt screening: On refined salt production lines, crystallised and dried salt particles undergo fine grading to ensure uniform particle size and stable quality.
Feed salt processing: Removing lumps after drying to ensure quality of feed additives.
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
Fortune 500 Client Testimonials
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.
