There is no uniform standard for the mixing speed of a horizontal fertilizer mixer. The core range is 15-85 r/min, with the mainstream commonly used speed concentrated between 20-45 r/min. Specific speeds vary depending on the model and the material being mixed.

1. Common Speeds for Mainstream Models

• Ordinary Double-Helix Horizontal Mixer (Suitable for organic fertilizers and compound fertilizers): Speeds are mostly 20-45 r/min, balancing mixing uniformity and low material loss; this is a common specification in production lines.

• Horizontal Plow Mixer (Suitable for easily agglomerated materials): Main shaft speed 15-85 r/min (adjustable), equipped with high-speed blades (1440-2880 r/min, optional) to enhance the dispersing effect.

• BB fertilizer blender: Speed controlled at 20-35 r/min; low-speed design reduces particle breakage, with a breakage rate ≤2%.

2. Key Influencing Factors

• Material Characteristics: For highly viscous materials prone to agglomeration, a higher rotation speed (40-60 r/min) is recommended; for granular materials (such as BB fertilizer raw materials), a lower speed (20-35 r/min) is recommended to prevent breakage.

• Equipment Capacity: Small-capacity models (1.5-5 t/h) typically use a speed of 39-46 r/min; large-capacity models (10-15 t/h) use a lower speed, approximately 20-21 r/min, to ensure thorough mixing.

• Agitator Structure: For twin-helix impeller models, due to their wide mixing range, the speed can be set to 25-40 r/min; when using plow-type impellers with high-speed fly cutters, the spindle speed should be controlled at 15-30 r/min to avoid speed conflicts with the fly cutters that could lead to a surge in energy consumption.

• Equipment power matching: The speed of a mixer driven by a 7.5kW motor is usually no more than 45r/min; high-power models above 15kW can be adapted to a wide speed range of 15-60r/min, but a frequency converter is required to achieve smooth speed regulation to prevent excessive starting current from damaging the motor.