Over 10,000+ customers' choice, Focus on screening industry 40+ years
Although sea salt and rock salt are both salts, they present different corrosion challenges during crushing:
Sea salt corrosion – the "double attack" of magnesium chloride and calcium chloride. In addition to sodium chloride, sea salt contains impurities such as magnesium chloride and calcium chloride. These components are highly hygroscopic – they rapidly absorb moisture from the air in humid environments, forming high‑concentration brine solutions. When these solutions contact metal, they produce intense electrochemical corrosion – far more aggressive than pure sodium chloride solutions. Sea salt crushing equipment requires materials with higher corrosion resistance grades.
Rock salt corrosion – the "combined wear" of sediment and brine. Rock salt mining often carries sediment and impurities. During crushing, these hard particles cause abrasive wear on equipment surfaces. At the same time, residual brine in rock salt is also corrosive. The combined effect of abrasion and corrosion makes rock salt crushing equipment wear out far faster than when processing ordinary materials.
The additional burden of wet and moist salt. Whether sea salt or rock salt, both can absorb moisture during storage and transport, becoming wet or moist salt. Wet salt is not only more corrosive but also tends to adhere to roller surfaces and crushing chamber walls – causing blockage and downtime. Ordinary carbon steel equipment rusts extremely rapidly in wet salt environments – rust particles that contaminate the material directly affect product quality and food safety.
Gaofu's corrosion‑resistant salt crusher has been comprehensively upgraded in material selection to address the corrosive characteristics of sea salt and rock salt:
Critical components constructed of 316L food‑grade stainless steel. The crushing chamber, feed hopper, discharge outlet, and the core roller shells that directly contact salt materials are all made of 316L food‑grade stainless steel. With added molybdenum (2%‑3%), 316L stainless steel offers excellent resistance to chloride ions (the primary component of salt). Even when exposed to high‑concentration brine or humid salt spray environments for extended periods, it maintains a bright surface – no rusting, no peeling.
Tiered protection – balancing durability and cost. For non‑direct‑contact parts such as the frame and motor base, carbon steel substrates are coated with heavy‑duty anti‑corrosion epoxy coatings or hot‑dip galvanised. This "tiered protection with key reinforcement" strategy ensures long‑term durability of critical components while reasonably controlling manufacturing costs. Compared with traditional equipment requiring major overhaul or replacement within months, the fully corrosion‑protected roller crusher can operate continuously and stably for years – significantly extending equipment service life.
304 stainless steel option for different corrosion levels. For production scenarios with relatively lower corrosiveness, 304 food‑grade stainless steel is also available. Both materials offer good corrosion resistance, meeting the requirements of most salt material operating conditions.
Food‑grade seals ensure purity and freedom from contamination. Seals are made of food‑grade corrosion‑resistant materials, ensuring the airtightness of the entire crushing system and preventing dust leakage and external contamination. For edible salt production, this means no heavy metal contamination during crushing – product quality is protected at the source.
Beyond corrosion, sea salt and rock salt crushing also faces the challenges of roller sticking and material blockage. Gaofu's corrosion‑resistant salt crusher incorporates multiple specialised design features to address these issues:
Differential‑speed self‑cleaning structure effectively reduces adhesion. The two rollers use differential‑speed operation – rotating at different speeds. The speed differential creates mutual scraping and self‑cleaning during crushing, effectively peeling off wet salt adhering to the roller surfaces. The roller surfaces feature anti‑adhesion textures – combined with the appropriate speed differential – effectively reducing the accumulation and blockage of wet, sticky material on the roller bodies and reducing manual cleaning frequency.
Sieve‑free open discharge – fundamentally eliminating blockage. In traditional crushing equipment with sieve or grate bottoms, the sieve openings are often the "disaster zone" for blockage – fine salt powder mixed with water forms a muddy substance that clogs the sieve openings, preventing material discharge. Gaofu's corrosion‑resistant salt crusher features a sieve‑free open discharge structure – after being crushed by the double rollers, material falls freely by gravity with no screen or grate obstruction. Regardless of moisture content or stickiness, crushed particles discharge smoothly.
Integrated "screening‑crushing" design – qualified material is not re‑crushed. The equipment combines screening and crushing functions in one unit – material entering the machine first passes through a pre‑screening area where qualified material is discharged directly, while only oversized material is crushed. This design not only prevents "re‑crushing of qualified material" that causes over‑grinding but also reduces material residence time inside the equipment – fundamentally reducing the risk of adhesion and blockage.
Whether for sea salt crushing and packaging or rock salt subsequent processing, precise control of discharge particle size is a core requirement. Gaofu's corrosion‑resistant salt crusher offers the following particle size control features:
Precisely adjustable discharge particle size. The double‑roller gap can be precisely controlled via the adjustment mechanism. Operators can arbitrarily adjust the crushing particle size within a range according to the requirements of subsequent washing, screening, or packaging processes – without replacing any components. Sea salt particle crushing achieves minimal over‑grinding with uniform particle size.
Low over‑grinding rate – improved yield. The equipment uses a combined squeeze + shearing crushing method, rather than impact. Material undergoes controlled fracturing between the rollers – the over‑grinding rate can be effectively controlled at low levels. Fines content in the finished product is significantly reduced, and particles have regular shapes.
Uniform discharge particle size – better product appearance. Dual‑roller synchronous drive technology ensures balanced distribution of crushing force. Finished particles are regular in shape with minimal powder content. For sea salt and refined salt products targeting the market, particle regularity directly influences market positioning and pricing.
Sea salt and rock salt production typically runs 24/7. Gaofu's corrosion‑resistant salt crusher is equipped with an intelligent control system that provides multiple safeguards for continuous operation:
Intelligent monitoring – real‑time operating status awareness. The equipment is equipped with an intelligent monitoring system that senses equipment operating status in real time (current, temperature, vibration). It alerts operators and takes protective measures when abnormalities are detected – improving operational safety.
Overload protection and automatic reverse obstacle clearance. When foreign objects or momentary overload are detected, the equipment can automatically reverse for a few seconds to discharge the obstruction, then resume forward rotation. When encountering uncrushable objects, the system can automatically increase the roll gap – after the object is discharged, the gap automatically resets. This prevents equipment stalling and damage.
Stable operation with low noise. Dual‑roller synchronous drive technology ensures low vibration and low noise. Low‑speed squeeze crushing mode ensures smooth operation with reasonable energy consumption.
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.
