1. Product Introduction

The Double Roller Press Granulator utilizes two counter-rotating rollers to force powdered materials into flakes or briquettes, which are then crushed and screened to achieve the final granules.

• Applications: Widely used in compound fertilizer production, pharmaceuticals, chemicals, and animal feed industries.

• Core Advantages: It is the preferred equipment for producing high, medium, and low-concentration specialized compound fertilizers. It is particularly effective for heat-sensitive materials that are prone to degradation at high temperatures.

• Output Form: The granule shape depends on the grooves on the roller surface. Common shapes include oblate (ball-shaped), pillow, walnut, or cylindrical.

2. Performance Features

The Double Roller Press Granulator offers an irreplaceable "Dry Process" advantage in industrial production:

• No Drying System Required: Since the process involves direct room-temperature extrusion, the material moisture requirement is extremely low (typically < 5%). This eliminates the need for expensive dryers and coolers, significantly reducing energy consumption.

• Lower Investment Cost: The process flow is short with a compact footprint and minimal auxiliary equipment, making it ideal for small-to-medium scale production lines.

• Wide Material Adaptability: It can process a vast range of materials, including inorganic salts, organic matter, and mineral powders, as long as they possess a degree of compressibility.

• High Granule Strength: Granules are formed through high-pressure mechanical compaction, resulting in a dense structure with excellent crush resistance, which facilitates easy transport and storage.

• Environmentally Friendly: The production process generates no wastewater or exhaust gas, and dust levels are effectively controlled.

3. Working Principle

The operational logic of the Double Roller Press Granulator can be summarized as: Forced Feeding → Pressing → Crushing & Grading.

Core Operational Stages:

1. Forced Feeding: Raw materials enter through the hopper and are delivered evenly between the two counter-rotating rollers, often assisted by an optional screw pre-compression device.

2. Extrusion & Shaping: The two rollers rotate at the same speed in opposite directions. As the material enters the "nip area" (the gap between rollers), it is subjected to intense mechanical pressure. This causes plastic deformation, compressing the powder into a continuous, solid flake or sheet of a specific thickness.

3. De-molding: As the rollers continue to rotate, the compressed flakes are automatically detached from the roller surface by elastic recovery and specialized stripping devices.

4. Crushing & Screening: The detached flakes enter a lower crusher to be broken down. The resulting mixture then enters a screening machine.

   • Qualified Granules: Sent to the finished product warehouse.

   • Fine Powder: Recycled back to the feeding hopper for re-granulation, ensuring zero material waste.