Custom Bar-Type Double Roller Extrusion Granulator: High-Yield Production of Irregular Strip Granule

In specialized chemical and fertilizer markets—such as water-soluble fertilizers (WSF), bentonite cat litter, soil conditioners, trace element additives, and industrial mineral salts—standard round or spherical pellets are not always the optimal product form. Spherical granules can roll off target soil zones, wash away during heavy irrigation, or dissolve too slowly due to uniform surface area density.

To meet the growing demand for irregular strip and elongated granules, our heavy machinery workshop manufactures custom Bar-Type Double Roller Extrusion Granulators. Engineered with precision-milled bar-type / strip-grooved alloy rollers, this dry compaction machine converts fine powders directly into high-density, irregular strip-shaped granules without adding liquid binders or requiring thermally intensive drying stages.

Why Choose Bar-Type Rollers for Irregular Strip Granulation?

Standard double roller compactors utilize spherical, pillow, or oval ball sockets on their roller surfaces. While effective for round fertilizer beads, spherical sockets cannot produce elongated, rod-like, or irregular strip geometries.

Our specialized bar-type roller profile provides unique mechanical and operational advantages:

• Milled Bar & Strip Groove Geometry: The surface of the counter-rotating alloy rollers features longitudinal or transverse bar-type channels. As powder passes through the compaction zone, it is squeezed into thick, high-density corrugated plates or continuous strips.

• Controlled Natural Fracture: Integrated breaking claw shafts located directly beneath the rollers shatter the pressed strips along their natural stress lines. This creates irregular elongated granules (2.0--10.0 mm length) with high mechanical strength and irregular fracture surfaces.

• Optimized Dissolution & Anti-Rolling Characteristics: Irregular strip granules stay anchored in soil, prevent wind dispersion on open fields, and provide ideal surface area profiles for fast-dissolving irrigation fertilizers or rapid-absorption cat litters.

Dry Extrusion Compaction: Zero Water & Zero Drying Expenses

1. Like all heavy-duty double roller extruders, our bar-type granulator utilizes dry mechanical compaction (10--30 MPa physical pressure) to induce molecular cohesion:

2. 50% Energy Savings: Because no water or liquid slurry is added during granulation, you completely eliminate rotary drum dryers, cooling towers, and fuel-heavy burners from your line.

3. Immediate Packaging Readiness: Discharged strip granules are cool, dense, and ready for immediate screening and automated bag packaging.

Step-by-Step Strip Granule Extrusion Process

1. Pre-Compaction Infeed: Dry powder ($le 5%$ moisture) enters the forced screw feeding hopper, which evacuates entrained air and pushes a consistent volume of powder into the roller bite zone.

2. High-Pressure Bar Roll Compaction: Synchronized counter-rotating rollers squeeze the powder into dense, bar-textured sheets under continuous hydraulic pressure.

3. Breaker Claw Sizing: A specialized tooth breaker below the rollers snaps the bar sheets into uniform, irregular elongated strips.

4. Classification & Recycle Loop: A vibrating screen separates qualified strip granules from fine dust. Oversize strips undergo gentle re-crushing, while undersize fines automatically feed back into the top hopper.

Why Source Directly from Our Equipment Workshop?

Direct Machinery Manufacturer: Buy directly from our manufacturing factory with zero trading company markups and direct engineer-to-engineer communication.

Custom Roller Machining: We custom-mill bar depth, channel pitch, and surface textures to achieve your exact required granule length, thickness, and hardness.

Complete Turnkey Line Integration: We engineer tailored CAD/3D facility layouts, foundation drawings, and electrical control panels for complete dry compaction and packaging plants.

Frequently Asked Questions

Q1: What are the primary applications for irregular strip granules produced by bar-type rollers?

A: Bar-type rollers are widely used for water-soluble NPK fertilizers, bentonite/clay cat litters, soil amendments, slow-release micro-nutrient blocks, pharmaceutical/chemical intermediates, and industrial salt compacts where high solubility or anti-rolling properties are required.

Q2: Why choose bar-type rollers over conventional spherical or pillow ball sockets?

A: Spherical sockets produce distinct round beads. Bar-type rollers create continuous high-density strips that break naturally into elongated shapes. This form factor provides faster water dissolution, eliminates field rolling on sloped agricultural terrain, and offers unique commercial product differentiation.

Q3: What is the maximum recommended material moisture content for bar roller extrusion?

A: For optimal dry extrusion without roller sticking, raw material moisture should remain at or below $5%$. If your raw material has higher moisture, a pre-drying stage or dry powder blending step is recommended before feeding the compactor.

Get Your Custom Equipment Quote & Workshop Video Today

Looking to produce high-density irregular strip granules with custom bar-type rollers? Partner directly with an experienced machinery manufacturer to secure durable equipment, custom engineering, and factory-direct pricing.

Contact our engineering team today with your target material, hourly throughput requirement (t/h), and desired granule size to receive a custom CAD proposal, factory testing video, and price quote within 24 hours!