Premium Zinc Concentrate
Engineered for seamless international export and high-efficiency smelting. Supplying the global market with China-compliant, high-grade sulfide and oxide zinc concentrates directly from our Andean operations.
Sourcing the Foundation of Industry.
SINCHI WAYRA SA is a premier global supplier of zinc concentrates, managing the entire extraction and beneficiation life cycle. From precision underground mining to advanced froth flotation circuits, we engineer our concentrates to meet the strict penalty limits of the world’s largest smelters.
Our Super High-Grade (50–55%) and Ultra Premium (55–60%) concentrates are specifically tailored for rapid China Customs clearance, ensuring maximum payable zinc terms, lower smelter penalties, and uninterrupted supply chain velocity.
Comprehensive Export Specifications
1. Zinc Concentrate Categories by Content
| Grade Type | Zinc (Zn) % | Commercial Classification | Typical Market |
|---|---|---|---|
| Low Grade | 20–35% | Marginal / Oxide blend | Small/Secondary smelters |
| Medium Grade | 35–45% | Standard commercial sulfide | Regional smelters |
| High Grade | 45–50% | Premium export grade | International buyers (KR, IN) |
| Super High Grade | 50–55% | China Preferred Grade | Major Chinese smelters |
| Ultra Premium | 55–60% | Rare premium concentrate | Specialized premium contracts |
2. Super High-Grade Spec (50–55% Zn)
China Customs Preferred Commercial Specification.
| Component | Guaranteed Spec |
|---|---|
| Zinc (Zn) | 50–55% |
| Lead (Pb) / Iron (Fe) | ≤1.5% / ≤8% |
| Sulfur (S) / Silica (SiO2) | 30–34% / ≤2.5% |
| Cadmium (Cd) / Copper (Cu) | ≤0.20% / ≤0.3% |
| Arsenic (As) / Antimony (Sb) | ≤0.05% / ≤0.02% |
| Mercury (Hg) | ≤0.01% |
| Moisture | ≤8% |
| Particle Size | 0–10 mm (Non-radioactive) |
3. Critical Penalty Elements
Strictly monitored limits to prevent severe smelter deductions.
| Element | Preferred Limit | Penalty Risk |
|---|---|---|
| Mercury (Hg) | ≤0.01% | Severe (Rejection risk) |
| Arsenic (As) | ≤0.05% | High |
| Cadmium (Cd) | ≤0.20% | High |
| Fluorine (F) | ≤0.05% | High |
| Chlorine (Cl) | ≤0.03% | Medium |
| Silica (SiO2) | ≤3% | Standard Smelter Deduction |
| Moisture | ≤8% | Freight & TML Deduction |
Maritime Export & Packaging Standards
A. FIBC Jumbo Bags & Bulk
Optimized for moisture control and rapid port loading.
- Jumbo Bags: 1–2 MT woven polypropylene with PE liner and 4 lifting loops.
- Loose Bulk: Direct loading for large-volume carrier vessels.
- Containerized: 20FT holding 20–27 MT. Requires plastic lining, moisture barrier, and dunnage.
- Steel Drums: 200–250kg for specialty/high-value assay material.
B. Maritime Compliance
Mandatory certification for global maritime transit.
- IMSBC Code Compliance: Strict adherence to bulk cargo codes.
- TML Certificate: Transportable Moisture Limit verification.
- Moisture & Radiation: Mandatory certificates ensuring safe handler environments and no liquefaction risk.
C. Pre-Shipment Inspection
Executed by BQCIS, SGS, BV, CCIC, or Intertek.
- Assay Verification: Chemical composition, Moisture, and TML testing.
- Physical Checks: Weight verification, sampling, and radiation screening.
- Supervision: Container loading and final seal verification.
Export Documentation Requirements
Commercial Invoice • Packing List • Bill of Lading • Certificate of Origin • Certificate of Analysis (COA) • Moisture Certificate • TML Certificate • Weight Certificate • Inspection Certificate • Radiation Free Certificate • Fumigation Certificate.
Production & Chemical Processing
1. Mining & Beneficiation
Raw ore is extracted via drill/blast methods, processed through primary jaw and secondary cone crushers (<20mm), and milled to 75–200 microns. Advanced flotation utilizes xanthate collectors, copper sulfate activators, and frothers to isolate zinc sulfide. Final thickening and vacuum drying drops moisture strictly below 8% for export.
2. Downstream Smelting Reactions
Our concentrates are engineered for perfect downstream pyrometallurgical and hydrometallurgical processing:
- Roasting: 2ZnS + 3O2 → 2ZnO + 2SO2
- Leaching: ZnO + H2SO4 → ZnSO4 + H2O
- Electrolysis: Zn2+ + 2e− → Zn
Fueling the Global Smelting Grid.
From the depths of our mining assets to the blast furnaces of Asia, SINCHI WAYRA SA’s zinc concentrates provide a reliable, high-purity baseload for global galvanization, alloy, and infrastructure manufacturing.