Hydraulic Roller Press Granulator: The Art of Precision Forming Under High Pressure?

Overview: The Dry-Forming Revolution Without Binders
In industries such as fertilizers, metallurgy, chemicals, and ceramics, directly converting powdered materials into high-strength, regularly shaped granules has always been a critical production step. The hydraulic roller press granulator, an outstanding representative of modern dry-forming technology, abandons the complex steps of adding water, binders, or applying heat required in traditional granulation processes. It relies purely on immense mechanical pressure to "cold-press" dry powder into dense sheets or pillow-shaped briquettes through a pair of precisely matched rollers, which are then crushed and screened to obtain uniform granules. This technology, characterized by high efficiency, energy savings, and high product purity, is leading a quiet revolution in the field of solid-state forming.
Core Principle: The Scientific Fusion of Pressure and Mold
The working principle of a hydraulic roller press granulator is essentially the engineering application of hydrostatic pressure forming. The process involves no chemical changes, only a physical transformation o
Detailed Four-Step Forming Process:
Controlled Feeding: Precisely metered dry powder is fed evenly and continuously into the nip area between two parallel rollers via a screw feeder or gravity feeder.
High-Pressure Compaction: This is the core step. Driven by a powerful hydraulic system, two counter-rotating rollers (one fixed, one horizontally floating) apply an extremely high linear pressure (typically 50-300 MPa) to forcibly compact the captured powder. The material undergoes three zones within the roller gap (roll nip):
Feed Zone: Material is drawn in.
Compression Zone: Pressure increases dramatically, air between particles is expelled, and the particles themselves undergo plastic deformation or brittle fracture, bonding tightly together through intermolecular forces.
Forming Zone: The material reaches maximum density and is pressed into a continuous