I. Product Overview
NPK compound fertilizer is a chemical fertilizer containing nitrogen, phosphorus, and potassium, offering advantages such as comprehensive nutrient content, high fertilizer efficiency, and convenient application. As a fertilizer equipment manufacturer, our rotary drum granulator demonstrates unique advantages in compound fertilizer production, enabling continuous and efficient granulation production.

II. Production Process Flow
Core Process: Raw Material Pretreatment → Batching and Mixing → Granulation and Forming → Drying and Cooling → Screening and Coating → Packaging and Warehousing

Key Steps:
Raw Material Pretreatment: Nitrogen, phosphorus, and potassium raw materials are crushed to 80-100 mesh to remove impurities.
Batching and Mixing: Precisely measure according to the formula and mix for 10-15 minutes until uniform.
Granulation and Forming: Granulate with water or steam using a drum granulator to achieve a particle size of 2-5mm.
Drying and Cooling: Dry at 120-150℃ until moisture content ≤1.5%, then cool to room temperature.
Screening and Coating: Screw and grade, then coat with an anti-caking agent.

III. Advantages of Drum Granulator Application
Technical Parameters:
Drum Diameter: 1.2-3.2 meters
Production Capacity: 5-50 tons/hour
Drum Speed: 15-25 r/min
Inclination Angle: 3-5°

Main Advantages:
High Particle Quality: Smooth surface, high strength, pelletizing rate ≥90% High production efficiency: Continuous and stable operation, suitable for large-scale production.
Strong adaptability: Can handle various raw material formulas, highly flexible.
Easy operation: Simple structure, low maintenance cost.
Energy saving and environmental protection: Low energy consumption, meets environmental protection requirements.

IV. Production Precautions
Raw material control:
Raw material fineness 80-100 mesh, mixing uniformity CV≤5%
Moisture content controlled at 18-25%, excessive moisture easily sticks to the drum wall.
Strictly control impurity content to avoid equipment wear.

Equipment operation:
Check drum balance and lubrication system before starting.
Control drum speed and tilt angle to ensure pelleting effect.
Maintain uniform feeding to avoid overload operation.

Quality control:
Particle size 2-5mm, pass rate ≥95%
Compressive strength ≥12N, ensuring safe transportation and storage.
Nutrient content deviation ≤±1%, meeting national standards.

V. Economic Benefit Analysis
Investment scale:
Small production line: 2-5 million RMB
Medium production line: 8-15 million RMB Annual Output Value: 50-200 million RMB
Market Prospects: The compound fertilizer market is experiencing annual demand growth of over 8%, with strong policy support. Profits per ton are 100-300 RMB, and the investment payback period is 2-4 years.

Conclusion: NPK compound fertilizer, as a crucial input in modern agriculture, enjoys stable market demand growth. The rotary drum granulator, with its technological advantages, provides reliable equipment support for compound fertilizer production. Through scientific process design and strict quality control, high-quality products can be produced to meet the needs of agricultural production.