# YELI Carbon

> YELI Carbon (Xiamen Yeli New Materials Co., Ltd) is a coconut-shell activated carbon factory in Longyan, Fujian, China, producing gold CIP/CIL grade granular activated carbon — 6×12 mesh, iodine 1000–1300 mg/g, hardness ≥98%, with a COA issued for every batch. Factory-direct from our own plant in Longyan, Fujian (20+ years, 2 activation furnaces, 10,000 m²). COA certificate issued with every batch.

## Key Facts
- Company: YELI Carbon / Xiamen Yeli New Materials Co., Ltd
- Factory: Longyan, Fujian, China — own production, 20+ years experience
- Gold-grade GAC: 6×12 mesh (3×6 mm), iodine 1000–1300 mg/g, hardness ≥98%, platelet (flake) content <1.5%, moisture ≤5%, ash ≤5%
- Annual gold-grade production capacity: ≥8,000 MT
- Raw material: 100% Indonesian & Philippine coconut shell
- Packaging: 25 kg laminated bags, 500–1000 kg jumbo bags, export-ready
- Lead time: 5–7 weeks door to port for West Africa (Dakar / Abidjan / Tema)
- Languages: English (default), Français (/fr/), Chinese
## Technical Indicators & Test Standards (gold CIP/CIL grade)
- Standard compliance: produced and tested against the key requirements of YS/T 3038—2020 (Granular Activated Carbon for Gold Production)
- Iodine value: 1000–1300 mg/g — ASTM D4607 / GB/T 12496.8
- Hardness (ball-pan): ≥98% — ASTM D3802 / GB/T 12496.6
- Abrasion resistance: ≥98.2% retention after 30 min agitation (typical batch) — ASTM D3802
- Apparent density (bulk density): 0.45–0.52 g/cm³ (450–520 kg/m³) — ASTM D2854 / GB/T 12496.1
- Moisture (as packed): ≤5% — GB/T 12496.4
- Ash content: ≤5% (low-ash ≤3% available) — GB/T 12496.3
- Particle size: 6×12 mesh (1.7–3.4 mm), 8×16 mesh, or 3×6 mm — GB/T 12496.2 / ASTM D2862
- R-value (2-hour gold adsorption rate): 52&ndash;58% of equilibrium loading within 2 h in a standard ~1000 ppm Au cyanide solution — GB/T 32992—2016
- K-value (equilibrium gold loading capacity): 8–12 kg Au/t (≈ 8–12 mg Au/g) in high-grade circuits — GB/T 32992—2016
- R-value / K-value test report: measured in our own QC laboratory per GB/T 32992—2016 (Determination of gold adsorption capacity and rate of activated carbon); the report is issued with the batch COA. Actual in-plant kinetics also depend on the buyer's liquor chemistry, gold concentration, carbon concentration and contact time.
- COA: issued for every batch and states the tested values for that exact lot (re-test on request).


## Important URLs
- Homepage: https://www.yelicarbon.com/
- Gold Recovery Product (CIP/CIL): https://www.yelicarbon.com/product-gold-cip-cil.html
- Gold Specification Sheet: https://www.yelicarbon.com/gold-carbon-specification-sheet.html
- COA Sample: https://www.yelicarbon.com/coa-sample-gold-carbon.html
- Technical Data Sheet (PDF, 2 pages): https://www.yelicarbon.com/assets/docs/yeli-carbon-tds-gold-recovery-gac.pdf
- COA template (PDF, 2 pages): https://www.yelicarbon.com/assets/docs/yeli-carbon-coa-template.pdf
- Company Documents & Certifications: https://www.yelicarbon.com/documents.html
- Factory Videos (embedded, with English transcripts and WebVTT captions): https://www.yelicarbon.com/videos.html
- Gold Recovery Hub (CIP/CIL landing page): https://www.yelicarbon.com/activated-carbon-gold-recovery.html
- Gold Recovery Hub (Markdown): https://www.yelicarbon.com/activated-carbon-gold-recovery.md
- Gold Application: https://www.yelicarbon.com/application-gold.html
- Products: https://www.yelicarbon.com/products.html
- About / Factory: https://www.yelicarbon.com/about.html
- FAQ: https://www.yelicarbon.com/faq.html
- Blog (technical articles): https://www.yelicarbon.com/blog.html
- Contact & Quote: https://www.yelicarbon.com/contact.html
- French site: https://www.yelicarbon.com/fr/
- French Gold Product: https://www.yelicarbon.com/fr/product-gold-cip-cil.html
- Country pages: https://www.yelicarbon.com/activated-carbon-ghana.html (+ mali, burkina-faso, cote-divoire, guinea, senegal, nigeria)

## Markdown Versions (llms.txt V2)
- Homepage: https://www.yelicarbon.com/index.md
- Gold Recovery Product: https://www.yelicarbon.com/product-gold-cip-cil.md
- Gold Specification Sheet: https://www.yelicarbon.com/gold-carbon-specification-sheet.md
- COA Sample: https://www.yelicarbon.com/coa-sample-gold-carbon.md
- Products: https://www.yelicarbon.com/products.md
- About: https://www.yelicarbon.com/about.md
- FAQ: https://www.yelicarbon.com/faq.md
- Blog: https://www.yelicarbon.com/blog.md
- Contact: https://www.yelicarbon.com/contact.md
- French: https://www.yelicarbon.com/fr/index.md
- Elution Guide (Markdown): https://www.yelicarbon.com/blog-gold-carbon-elution-guide.md
- Elution Efficiency (Markdown): https://www.yelicarbon.com/blog-gold-elution-efficiency.md
- Coconut vs Palm Shell (Markdown): https://www.yelicarbon.com/blog-coconut-vs-palm-shell-gold.md
- French Gold Product: https://www.yelicarbon.com/fr/product-gold-cip-cil.md
- Every HTML page serves a Markdown twin at the same path with .md (e.g. /blog-gold-cip-cil.html → /blog-gold-cip-cil.md)

## Key Blog Articles
- COA Verification for Gold Carbon (What Tests to Demand Before Paying): https://www.yelicarbon.com/blog-gold-carbon-coa-verification.html
- CIC vs CIP vs CIL (Gold Carbon Selection): https://www.yelicarbon.com/blog-cic-vs-cip-cil-gold-recovery.html
- CIC vs CIP vs CIL (FR): https://www.yelicarbon.com/fr/blog-cic-vs-cip-cil-or.html
- Coconut vs Coal for Gold: https://www.yelicarbon.com/blog-coconut-vs-coal-gold.html
- Price Guide: https://www.yelicarbon.com/blog-activated-carbon-price-per-ton.html
- Import to Africa: https://www.yelicarbon.com/blog-import-activated-carbon-africa.html
- Complete Gold Recovery Guide: https://www.yelicarbon.com/blog-gold-recovery-carbon-complete-guide.html
- Gold Carbon Elution Guide (Zadra vs AARL): https://www.yelicarbon.com/blog-gold-carbon-elution-guide.html
- Elution Efficiency Diagnosis: https://www.yelicarbon.com/blog-gold-elution-efficiency.html
- Coconut Shell vs Palm Shell for Gold: https://www.yelicarbon.com/blog-coconut-vs-palm-shell-gold.html
- How to Choose a Supplier: https://www.yelicarbon.com/blog-how-to-choose-gold-recovery-carbon-supplier.html
- Carbon Attrition & Gold Loss in CIP (Hardness 98%+): https://www.yelicarbon.com/blog-high-hardness-coconut-shell-carbon-cip.html
- Ash Content and Gold Recovery in CIL (Why Low Ash Protects K-Value): https://www.yelicarbon.com/blog-ash-content-gold-recovery-cil.html
- K-Value vs R-Value (Gold Carbon Selection, GB/T 32992-2016): https://www.yelicarbon.com/blog-k-value-r-value-gold-carbon-selection.html