Granular Single Superphosphate (GSSP) Production Line

Equipment in Action

Description

This gssp production line represents an upgrade from traditional SSP manufacturing, focusing on enhancing product usability and efficiency. It utilizes the acidulation of phosphate rock followed by a sophisticated agglomeration and curing process. The system is optimized for high output of GSSP with excellent crushing strength and controlled particle size, making it an ideal primary phosphorus source for N-P-K compound fertilizer blending and modern agricultural applications demanding high spreading accuracy.

What Is SSP & GSSP?

SSP (Single Super Phosphate) is produced by reacting phosphate rock with sulfuric acid, forming monocalcium phosphate and gypsum. It is typically supplied as a powder.

GSSP (Granulated SSP) is made by granulating powdered SSP in a drum granulator, followed by drying and cooling, which improves flowability and handling for mechanized applications.

Why Upgrade from Powdered SSP to Granular GSSP?

Traditional powdered SSP faces challenges like high dust, easy caking, nutrient segregation, and difficulty in mechanized application. Processing it into Granular SSP (GSSP) is an essential step for Industrial upgrading.

Market Demand: Compound fertilizer plants and large farms prefer granular raw materials with superior physical properties.
Increase Product Value: GSSP commands a significant market premium over powdered products.
Solve Application Pain Points: Perfectly suited for modern Bulk Blend (BB) fertilizer production lines, enabling precise formulation.
Meet Environmental Trends: Drastically reduces dust pollution during production, transportation, and application.

Application Fields

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Direct Application Fertilizer

Standalone phosphate and sulfur source for crops like legumes, oilseeds, and vegetables.

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Compound Fertilizer Production

Compound Fertilizer Production: Key phosphorus raw material for N-P-K compound fertilizers and BB fertilizers.

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Sulfur Supplementation

Essential in regions with sulfur-deficient soils, improving crop yield and quality.

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Base Fertilizer: Quick-acting phosphate component for pre-planting application.

Used to adjust soil PH levels in certain applications and supply necessary calcium (Ca).

Core Processing Section

At the core of the GSSP processing line is an advanced fertilizer granulation system, specifically engineered to convert pre-conditioned powder feedstock into high-strength, uniformly sized granules.

Granule formation is achieved via either a high-capacity rotary drum granulator, optimized for large-scale, continuous production, or a precision-adjustable disc granulator, enabling fine-tuned control over pellet morphology and size distribution.

Once formed, the wet granules immediately enter a heavy-duty rotary dryer to rapidly eliminate moisture, followed by a rotary cooler that thermally stabilizes the particles and increases their mechanical hardness to prevent crushing. The hardened granules are then transferred to a multi-deck vibrating screen, which strictly classifies the product, routing on-spec sizes to the final coating machine for anti-caking surface treatment, while directing fines and oversized material back into the recycling loop.

Product Advantages

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High Yield & Low Energy Consumption

Closed-loop granulation and efficient recycle system ensure raw material utilization > 95%.

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Superior Final Product Quality

Uniform granules (2-4mm) with high crushing strength, suitable for long-distance transport and mechanized spreading. Excellent flowability, virtually dust-free, and resistant to caking during storage, making it the ideal phosphorus source for BB fertilizers.

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Stable & Reliable Process Design

Based on decades of phosphate fertilizer engineering experience, with core parameters validated across numerous projects, ensuring stable and continuous operation. Key equipment (granulator, dryer) features heavy-duty design and wear-resistant materials for long service life and low maintenance costs.

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Flexible & Scalable Solutions

Customizable automation levels, from basic control to full-plant DCS intelligent control systems.

System Components

Stage	Equipment	Function
Raw Material Handling & Preparation	Bucket Elevators, Belt/Screw Conveyors	Delivery of phosphate rock and sulfuric acid
Dosing & Mixing	Precision Dosing Units, Adjustable Electronic Belt Scales	Accurate ratio control before reaction
Acidulation & Curing	Curing Den (Pan or Continuous Belt)	Core reaction and product solidification
Granulation	Disc or Drum Granulator	Form granular SSP with uniform particle size
Drying & Cooling	Rotary Dryer, Cooling Drum	Remove moisture, stabilize granules
Screening	Vibrating Screens	Separate undersize and oversize granules
Crushing & Recycle	Lump Breakers, Crushers	Break oversize granules and recycle
Environmental Control	Cyclone Separators, Bag Pulse Dust Collectors, Automatic Ash Discharge, Star-type Discharge	Manage flue gas and dust
Packaging	Belt Conveyors, Packaging Machines	Transfer to storage or bagging

Lump Crusher

NE Plate Chain Bucket Elevator

Dust Collector

FU Series Chain Conveyor

Customization Services We Offer

Raw Material-Based Process Design: Conduct lab tests using your specific phosphate rock to determine optimal acid-to-rock ratio and granulation parameters, providing a customized process package.
Site Layout & General Plot Plan: Design the most efficient production line layout based on your existing workshop or new land plot, minimizing footprint and ensuring smooth logistics.
Deep Customization of Core Equipment: Customize granulator size, dryer heat source (coal, gas, steam) based on capacity and product specifications.
By-Product Recovery Solutions: Optional Fluorosilicic Acid (H₂SiF₆) Recovery System to convert fluoride in exhaust gas into a valuable by-product, achieving both environmental and economic benefits.
Smart Factory Upgrade: Integrate IoT data collection and cloud platforms for remote production monitoring, energy efficiency analysis, and predictive maintenance.