Heavy-Duty Carbon Steel Pan Granulator for Mineral fertilizer (Diameter 2.8m)

In the modern mineral and compound fertilizer processing industry, handling heavy, highly abrasive, and cohesive raw materials—such as bentonite, potassium sulfate, phosphate rock, calcium powders, and dense mineral ores—demands extreme mechanical rigidity and continuous operational stability. The Heavy-Duty Carbon Steel Pan Granulator for Mineral Fertilizer (Diameter 2.8m) is a continuous disc pelletizing machine purpose-built to withstand severe physical loads while maintaining high pelletizing efficiency.

Constructed by Gofine Machine with a heavy-duty reinforced carbon steel frame, a thick-walled 2.8-meter pan hull, and a low-center-of-gravity sub-base, this machine absorbs intense torque forces and eliminates operational vibration during continuous heavy-bed rolling. The primary technical highlight of this 2.8m model is its specialized active rotary scraper system, which dynamically sweeps across the inner pan surface to maximize powder-binder contact and prevent sticky mineral build-up, ensuring continuous 24/7 reliability and granulating yields exceeding 92%.

Active Rotary Scraper System: Features a powered, driven rotary scraper unit instead of conventional static blades. It continuously cleans the inner pan bottom and sidewalls, significantly increasing the effective contact area between rolling mineral powders and liquid binders while completely preventing sticky pan accumulation.

Heavy-Duty Reinforced Frame: Built on heavy structural I-beam steel sub-frames with heavy cast iron trunnions, providing maximum structural rigidity to resist hull deformation and severe operational vibration under heavy material beds.

High-Manganese Steel Wear Components: Critical driving gears, pinions, and high-impact wear zones are crafted from high-manganese steel and drop-forged alloy materials to withstand long-term abrasion from hard mineral salts.

Adjustable Disc Tilt & Variable Speed: Equips an adjustable inclination mechanism (40° -- 55°) paired with variable-frequency drive (VFD) speed regulation, allowing operators to fine-tune particle residence time and granule diameter (1--6 mm).

Mineral Fertilizer Manufacturing: Granulating bentonite, potassium sulfate, rock phosphate, calcium nitrate, ammonium sulfate, and trace element mineral additives.

Inorganic Chemical & Powder Processing: Converting industrial chemical powders, fine ores, coal dust, lime powder, and metallurgy extracts into dense spherical pellets.

Compound NPK Fertilizer Lines: Processing high-density nitrogen, phosphorus, and potassium powder blends requiring precise liquid-binding agglomeration.

Raw Material Feeding: Homogenized fine mineral powders enter the continuously rotating 2.8m carbon steel pan at a calibrated feed rate.

Liquid Atomization & Binding: Atomized water or liquid binder spray is applied evenly over the tumbling bed, creating water-film surface tension across the powder particles.

Centrifugal Rolling & Growth: As the disc rotates at a set angle and speed, the powders begin liquid-phase wet agglomeration. Centrifugal forces, gravity, and continuous friction cause particles to roll into dense, spherical green granules.

Active Surface Cleaning: The specialized active rotary scraper constantly clears the pan bottom and side walls, maximizing contact area and ensuring smooth material circulation without clogging.

Automatic Discharge: Once granules grow to the desired size, they naturally spill over the lower rim of the inclined pan due to centrifugal classification, passing to the next processing phase.

To build a fully automated 2.8m mineral pan granulator production line, Gofine Machine provides the following integrated equipment setup:

Batching & Dosing System: Automatic multi-hopper batching scale for precise mineral formulation ratios.

Crushing & Mixing Unit: Heavy cage mill or chain crusher paired with a horizontal double-shaft mixer to ensure fine, uniform powder feeding.

Pelletizing Core: Heavy-Duty Carbon Steel Pan Granulator (Diameter 2.8m) with integrated active rotary scraper unit.

Thermal Processing Circuit: Continuous rotary drum dryer and counter-current rotary cooler to remove moisture and lock in granule strength.

Screening & Recirculation: Multi-deck vibrating screen to separate qualified granules (2--4.5 mm), returning undersized particles to the granulator and oversized particles to the crusher.

Coating & Packaging: Rotary coating drum for anti-caking agent application, followed by an automated quantitative bagging machine.

Investing in a heavy-duty pan granulation system requires engineering reliability, custom machine adaptability, and long-term technical support. As a direct-from-factory machinery manufacturer, Gofine Machine offers full-lifecycle solutions—from initial plant layout designs and custom disc diameter tailoring to overseas installation guidance and operator training. Whether you are upgrading an existing mineral processing line or commissioning a new high-capacity compound fertilizer project, our 2.8m heavy-duty carbon steel pan granulators are built to deliver maximum uptime and superior ROI. Contact our engineering team today to receive detailed technical specifications, tailored site plans, and a competitive factory quotation.