Sulfur granules

Description

1. Product Overview

Sulfur granules are a high-purity, solid elemental sulfur product engineered for large-scale industrial processing and agricultural formulation. Primarily used in the production of sulfuric acid—the world’s most widely produced chemical by volume—these granules also serve critical roles in fertilizer manufacturing, metal leaching, and rubber vulcanization. For global B2B buyers, the key value proposition lies in consistent particle size, low dust generation, and stable chemical properties, which directly reduce handling costs and improve process safety. Strategically, sourcing premium sulfur granules ensures supply chain resilience and compliance with tightening environmental and purity standards across regulated markets.

2. Key Specifications & Technical Characteristics

• Chemical composition: Elemental sulfur (S) – minimum 99.9% purity

• Grade: Industrial / technical grade; non-agricultural dusting grade available on request

• Physical form: Uniform, free-flowing granules

• Color: Bright yellow to pale yellow

• Particle size distribution: 2–5 mm (standard); custom screening available

• Bulk density: Approx. 1.15–1.25 g/cm³

• Moisture content: ≤ 0.5%

• Ash content: ≤ 0.1%

• Acidity (as H₂SO₄): ≤ 0.01%

• Packaging options: 25 kg laminated bags, 1 MT big bags, or bulk in pneumatic tankers / open-top containers

• Shelf life: 24 months when stored in dry, cool, well-ventilated conditions away from strong oxidizers

3. Core Industrial Applications

• Sulfuric acid manufacturing: Primary feedstock for contact-process acid plants; the granule form improves feeding accuracy and reduces sublimation losses compared to powder or lump sulfur.

• Fertilizer production: Key sulfur source for phosphate fertilizers (e.g., single superphosphate, ammonium sulfate); uniform granule size enables precise blending with NPK streams.

• Mining (heap leaching): Used in copper and uranium extraction; sulfur granules provide slower, controlled oxidation for sustained acid generation in bio-leaching operations.

• Rubber vulcanization: Acts as a cross-linking agent; low-dust granules reduce worker exposure and improve dispersion in rubber compounding.

• Agricultural soil amendment: Granular elemental sulfur for pH reduction in alkaline soils; delayed conversion to sulfate minimizes leaching and reduces application frequency.

Why it outperforms alternatives – Lower dust means less explosion risk and fewer material losses. Higher purity minimizes heavy-metal contamination (e.g., arsenic, selenium) in downstream chemical processes, directly reducing purification costs.

4. Competitive Advantages

• Quality consistency: Lot-to-lot purity variance < 0.05% – certified via ISO 17025-accredited lab reports for every shipment.

• Supply reliability: Long-term sourcing contracts with gas/oil desulfurization plants; 24/7 order tracking and expedited emergency release capability.

• Logistics capability: Dedicated dry-bulk warehousing in three regional hubs (Asia, Europe, North America). Average lead time: 10–14 days FOB origin.

• Price competitiveness: Direct mill-negotiated pricing with no hidden broker margins – published index-linked formula or fixed quarterly contracts.

• Sustainability: Byproduct recovery (sweetening of natural gas / refining), reducing industrial waste. Our supply chain complies with ISO 14001 and offers carbon footprint declarations on request.

• Technical support: Full SDS, material compatibility guides, and on-call process engineering support for integration into your production line.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): BULK 20MT (20 metric tons) per product line per destination

• Loading capacity:

  • 20’ standard container: 20–22 MT (depending on packaging)

  • 40’ container: up to 45 MT (big bags only)

  • Bulk vessel / barge loading: up to 5,000 MT per shipment

• Incoterms offered: EXW, FOB, CFR, CIF

• Payment terms: LC at sight, or 30% TT advance + 70% against shipping documents (subject to credit approval)