Double Roller Granulator for Sale: Compact Dry Granulation

Every fertilizer plant owner knows the pain of a granulation line that swallows energy and capital: a dryer to run, steam to generate and a binder to buy every week.

The double roller granulator removes all three.

It presses dry powder between two counter-rotating rollers under 8–15 MPa of compaction pressure to form dense, uniform granules, with no dryer, no cooler, no steam boiler and no binder.

For NPK, urea, ammonium sulfate and compound fertilizer producers targeting 1–20 TPH, the LANE double roller granulator cuts energy use by up to 40% and line cost by roughly 30–40% compared with drum granulation, so you can start granulating sooner at a fraction of the investment.

Double Roller Granulator Advantages

The double roller granulator is built around a simple truth: if you do not add liquid, you do not have to spend energy removing it.

That single design choice drives every advantage below.

• No drying step, 30–40% lower line cost.A 5 TPH dry extrusion line — granulator, crusher, screener and conveyors — typically costs USD 110,000–180,000, while a comparable drum line with dryer, cooler, steam system and dust collection runs USD 180,000–280,000. Remove the dryer and the gap widens further.
• Energy use of just 25–35 kWh per ton. Drum granulation needs 45–65 kWh/ton and a disc pan needs 35–50 kWh/ton. Over a 12,000-ton production year, extrusion saves 120,000–360,000 kWh, which matters where industrial power costs USD 0.10–0.18 per kWh.
• Compact footprint. Without a dryer and cooler, the line is 40–50% shorter. A 5 TPH extrusion line fits in roughly 300–400 m² of floor space versus 500–700 m² for a drum line, so it retrofits cleanly into existing warehouses.
• Instant start and stop. No dryer preheating, no steam ramp-up and no cooling-water circulation. Press green and material flows; press red and it stops, which suits variable shifts and made-to-order production.
• Kind to heat-sensitive formulations. Dry extrusion keeps material below 40–50°C using only frictional heat, so chelated zinc, biological inoculants and other temperature-sensitive additives survive intact.

Double Roller Granulator Technical Specifications

The working principle is simple and repeatable.

Dry powder at ≤3% moisture enters the gravity-fed hopper and falls into the nip zone between two rollers turning inward at 10–25 RPM.

As the gap narrows toward the centerline, compaction pressure climbs from near zero to 8–15 MPa, forcing particles into mechanical interlock.

Soluble salts such as urea and ammonium sulfate cold weld at the contact points, giving the compacted sheet its green strength.

The continuous sheet then falls into a toothed crusher, and a double-deck screener separates the 2–4 mm product while undersize fines return to the hopper for re-compaction in a closed loop that keeps yield high.

• Raw material moisture: ≤3%
• Compaction pressure: 8–15 MPa
• Roller speed: 10–25 RPM
• Compacted sheet thickness: 8–15 mm
• Final granule size: 2–4 mm
• Capacity: 1–20 TPH (customized)
• Certification: CE / ISO / SGS available
• Warranty: 5-year
• Layout design support: provided

Double Roller Granulator Applications

A double roller granulator suits three situations best.

First, plants in dry regions or without natural gas infrastructure, where running a dryer is expensive or simply not possible. Second, budget-conscious operations targeting 1–5 TPH that want the lowest capital entry into granulation. Third, producers of NPK, urea, ammonium sulfate and compound fertilizer who accept angular granules at a slight cost discount to spherical product, functionally equivalent for most soil application. For micronutrient or bio-additive blends that degrade in a dryer, low-temperature extrusion is often the only workable route.

Double Roller Granulator FAQ

Q: Do I need a dryer with a double roller granulator?

A: No. Dry extrusion removes the dryer, cooler, steam boiler and binder from the equipment list, which is the main reason line cost and energy drop so sharply.

Q: What materials can this extrusion granulator process?

A: NPK, urea, ammonium sulfate and most compound fertilizer powders at ≤3% moisture. Materials containing soluble salts form stronger granules thanks to the cold-welding effect.

Q: What granule size does it produce?

A: Typically 2–4 mm angular granules, adjustable through roller cavity and screen selection.

Q: What support does LANE offer?

A: Layout design support, full specifications and a 5-year warranty, with CE/ISO/SGS certification available. Share your feedstock and target capacity for a site-specific drawing and quote.

Choosing a granulator is a capital decision, and the double roller granulator earns its place whenever the goal is high output, low energy and fast payback.

It cuts energy to 25–35 kWh/ton, trims line cost by 30–40% and runs a shorter, drier, more forgiving process than drum granulation.

To see whether dry extrusion fits your material and budget, send your feedstock details to sales@lanesvc.com or message WhatsApp +86 13526470520.

Our engineers will prepare a layout drawing and a detailed quote for your plant. Compare the LANE double roller granulator on our product page to review full specifications before you decide.

Browse the double roller extrusion granulator product page for full specifications and line layouts.