Product Overview
Industrial grade granulated sulphur (also referred to as prilled sulphur) is a high-purity elemental sulphur product manufactured via advanced prilling and granulation processes, forming uniform spherical solid granules. Produced in strict accordance with industrial quality standards, this product delivers exceptional purity, minimal impurity content, controlled low acidity and low free moisture, making it a reliable raw material for high-demand industrial production scenarios.
With a typical granule size range of 2–6 mm and consistent particle size distribution, granulated sulphur features excellent flowability and handling performance, effectively reducing dust generation during transportation and production feeding. It is supplied in bulk form to support large-volume, long-term industrial procurement, and is widely utilized as a fundamental chemical feedstock across the fertilizer, chemical manufacturing and petroleum refining industries.
Product Specifications
| Parameter | Unit | Typical Value | Notes |
|---|---|---|---|
| Sulphur Content | wt.% | ≥ 99.8 | High-purity elemental sulphur |
| Ash Content | wt.% | ≤ 0.05 | Low mineral residue level |
| Free Moisture | wt.% | ≤ 0.5 | Strictly controlled moisture content |
| Acidity (as H₂SO₄) | wt.% | ≤ 0.003 | Ultra-low acidity grade |
| Colour | - | Bright Yellow | Natural visual appearance |
| Physical Form | - | Granulated / Prilled | Regular spherical granules |
| Granule Size | mm | 2 – 6 | Standard particle dimension |
| Granule Size Distribution | mm | 90% within 2–6 mm | Compliant with production standards |
| Bulk Density | kg/m³ | 1,070 – 1,100 | Slight variation based on granule size |
| Melting Point | °C | ~115 | Standard physical property of sulphur |
| Supply Form | - | Bulk | For large-scale industrial use |
| Transport Compatibility | - | Railcars, trucks, vessels | Suitable for multi-modal bulk logistics |
| Grade | - | Industrial Grade | For professional industrial applications |
Key Features & Advantages
1. Ultra-High Purity with Minimal Impurities
With a minimum sulphur purity of 99.8 wt.% and ash content as low as 0.05 wt.%, this product contains extremely low levels of mineral residues and foreign impurities. The high-purity composition ensures stable reaction efficiency in downstream production, reduces contamination risks for finished goods, and eliminates the need for additional purification procedures in most industrial processes.
2. Strictly Controlled Low Acidity & Moisture
The product maintains an ultra-low acidity level (≤ 0.003 wt.% calculated as H₂SO₄) and free moisture content below 0.5 wt.%. This formulation effectively prevents corrosion to storage silos, transportation equipment and production pipelines, extends product shelf life, and avoids quality degradation or caking issues during long-term warehousing.
3. Uniform Granule Morphology for Easy Handling
Produced through precision prilling technology, the sulphur forms regular, smooth spherical granules, with 90% of particles falling within the 2–6 mm size range. The consistent particle size delivers excellent flowability, simplifies automatic feeding and metering operations in industrial production lines, and greatly reduces dust generation during loading, unloading and material transfer.
4. Stable Physical & Chemical Properties
With a bulk density ranging from 1,070 to 1,100 kg/m³ and a standard melting point of approximately 115 °C, the product maintains stable physical performance under normal storage and transportation temperatures. Its reliable chemical properties ensure consistent production output across batches, supporting steady operation of continuous industrial production systems.
5. Cost-Efficient Bulk Supply Model
Designed for large-volume industrial demand, the product is supplied in bulk form, fully compatible with railcar, bulk truck and ocean vessel transportation. The bulk supply model eliminates extra packaging costs, improves loading and unloading efficiency, and provides a cost-effective solution for long-term, high-volume annual procurement contracts.
Application Fields
As a core basic chemical raw material, industrial granulated sulphur is widely applied across multiple major industrial sectors:
1. Fertilizer Manufacturing
Granulated sulphur is the primary raw material for sulphuric acid production, which is further processed into various agricultural fertilizers, including single superphosphate, ammonium phosphate, potassium sulphate and ammonium sulphate. High-purity sulphur ensures stable acid production efficiency and consistent fertilizer nutrient content, supporting soil improvement and crop nutrient supply in modern agriculture.
2. Chemical Production Industry
In the chemical sector, granulated sulphur serves as feedstock for manufacturing a full range of sulphur-containing chemicals, such as sulphuric acid, carbon disulphide, sodium sulphide, sulphur dioxide, metal sulphates and sulphuric acid derivatives. It is also an essential material for producing rubber vulcanizing agents, agrochemicals, industrial dyes, pharmaceutical intermediates and surface treatment chemicals.
3. Petroleum & Natural Gas Refining
In oil refining and natural gas processing industries, granulated sulphur is widely used in hydrodesulfurization units and sulphur recovery systems. It is also a key raw material for producing refining catalysts and fuel additives, helping to reduce sulphur content in finished fuels, meet clean fuel quality standards, and support environmental compliance in the energy processing sector.
4. Other Industrial Applications
Beyond core sectors, granulated sulphur is also utilized in metallurgical ore flotation, industrial water treatment, textile bleaching processes, sulphur-based cement production, firework manufacturing and food-grade preservative production (for specialized food-grade variants).
