Fertilizer grading equipment refers to equipment used for the classification, grading, and screening of fertilizers. It is mainly applied to classify and separate fertilizer materials by particle size, shape, density, and related physical characteristics, in order to meet the nutrient application requirements of different crops. Common fertilizer grading equipment includes **vibrating screening machines** and **rotary drum screening machines**. By adopting different screen apertures as well as rotational or vibratory motion modes, these machines achieve effective separation and classification of fertilizer particles of various sizes, thereby improving fertilizer utilization efficiency and overall production efficiency.
I. Product Overview:
Fertilizer grading and screening equipment is a key unit in fertilizer production lines, used for particle size classification, quality control, and product standardization. It is typically installed after granulation, drying, or cooling processes. Through physical screening, fertilizer granules are accurately separated according to preset particle size ranges, resulting in finished products with uniform specifications, consistent appearance, and suitability for packaging and marketing.
In modern fertilizer industries—whether organic fertilizers, bio-organic fertilizers, compound fertilizers, or organic–inorganic compound fertilizers—strict requirements are imposed on particle size uniformity. Oversized granules negatively affect application uniformity and dissolution rates, while excessive fines tend to generate dust and reduce commercial value. Through continuous and stable grading operations, fertilizer grading and screening equipment effectively resolves uneven particle size distribution issues and is an indispensable component for improving fertilizer quality and overall production line efficiency.
With the expansion of production scale and increasing automation levels, grading and screening equipment has evolved from traditional single-function screening units into integrated systems that combine screening, grading, return-material control, and environmental sealing. These systems can flexibly match different capacities and process requirements and are widely applied in small-, medium-, and large-scale fertilizer production projects.
II. Working Principle:
The core working principle of fertilizer grading and screening equipment is based on differences in particle size, which result in varying probabilities of particles passing through screen apertures during screening motion, thereby enabling automatic classification.
According to structural configuration and drive mode, the operating mechanisms can be divided into two main types: vibratory grading and rotary drum grading:
1. Vibratory Grading and Screening Equipment
In vibrating grading systems, vibration motors or exciters generate periodic excitation forces, causing the screen box to vibrate continuously in a specific direction. Fertilizer particles are lifted, rolled, and conveyed forward across the screen surface. Particles smaller than the screen aperture pass through the mesh and fall into the next process or are discharged as finished products, while oversized particles move forward along the screen surface and exit from a separate discharge outlet. By arranging multiple screen layers, multi-stage particle size separation can be completed in a single operation.
2. Rotary Drum Grading and Screening Equipment
Rotary drum screening equipment achieves classification through a slowly rotating cylindrical screen. Materials tumble continuously inside the drum as it rotates. Under the combined effects of gravity and friction, smaller particles pass through the screen apertures first, while larger particles gradually move toward the discharge end. This screening process is smooth and gentle, with minimal impact on materials, making it particularly suitable for fertilizers with higher moisture content or materials prone to agglomeration.
III. Product Applications:
Fertilizer grading and screening equipment offers strong versatility and adaptability, making it suitable for screening and grading a wide range of fertilizer products and related materials. Typical application areas include:
1. Organic Fertilizer Production Lines
Used for particle size grading of organic fertilizer granules after fermentation and granulation, removing oversized lumps and fine powders to improve uniformity and appearance quality.
2. Bio-Organic Fertilizer Production Systems
Provides gentle screening for fertilizer granules containing microbial agents, minimizing particle breakage and ensuring microbial activity and fertilizer efficacy.
3. Compound and Blended Fertilizer Production Lines
Suitable for screening granules produced by extrusion granulation, rotary drum granulation, or spray granulation, enabling precise classification of different product specifications and recycling of unqualified particles.
4. Livestock and Poultry Manure Resource Utilization Projects
Applied to screen and grade fermented manure materials, removing incompletely decomposed coarse impurities and improving downstream granulation and packaging efficiency.
5. Agricultural Mineral and Functional Fertilizer Processing
Used for particle size grading of humic acid granules, mineral fertilizer granules, controlled-release fertilizers, and similar products to meet diverse application methods and market demands.
6. Crushing and Pretreatment Process Integration
Functions as a grading unit after crushing operations to control particle size ranges and reduce the load on downstream equipment.
IV. Product Features:
1. High Grading Accuracy and Consistent Product Quality
Through optimized screen aperture design and screening trajectories, the finished particle size range can be effectively controlled, significantly enhancing product uniformity and marketability.
2. Robust Structure and Reliable Operation
The main structure is manufactured from high-strength steel, with key load-bearing components reinforced for excellent fatigue resistance, making it suitable for long-term continuous operation.
3. Multi-Layer Screening Design for Higher Efficiency
Supports dual-layer or multi-layer screen configurations, enabling multi-stage grading in a single pass, reducing material circulation and increasing overall throughput.
4. Strong Adaptability and Anti-Clogging Performance
For high-moisture or sticky organic fertilizer materials, anti-clogging screens or self-cleaning devices can be installed to ensure smooth and stable screening.
5. Easy Maintenance and Low Operating Cost
Modular screen installation allows quick replacement; simple transmission and vibration structures reduce daily maintenance workload and operating costs.
6. Good Sealing and Environmental Compliance
Enclosed structural designs effectively minimize dust leakage and can be integrated with dust collection systems to meet modern environmental protection standards.
7. Customizable Configuration Options
Screen size, number of screening layers, drive methods, and discharge structures can be customized according to material characteristics, capacity requirements, and production line layout for optimal compatibility.
8. Seamless Integration with Production Lines
Can be smoothly connected with granulators, dryers, coolers, and packaging systems to form a complete and continuous fertilizer production process.
As a critical piece of equipment for controlling product quality in fertilizer production, the performance of fertilizer grading and screening equipment directly impacts the market competitiveness of finished fertilizers. Through scientifically designed grading principles, stable structural design, and flexible configuration options, this equipment significantly enhances standardization and automation levels, providing strong support for fertilizer enterprises pursuing high-quality, large-scale production.
For more inquiries or more information, please contact:
Sales Department / Tina Tian
+86 – 15538237222
Zhengzhou Yizheng Heavy Machinery Equipment Co., Ltd
Email: tianyaqiong@yz-mac.cn
Website: www.yz-mac.com
https://www.yz-mac.com/linear-vibrating-screener-2-product/
Post time: Feb-04-2026