High Purity CaCO₃
Turning oyster shells into
high-purity calcium carbonate
A development line that combines oyster shells — a clean raw material — with C-PCC technology to make high-purity calcium carbonate. It aims to reuse CO₂ generated in the process.
Process
Oyster shells → calcium refining → high-purity CaCO₃
Clean feedstock
Uses oyster shells as a clean feedstock
Circular design
Designed to reuse process materials and reduce wastewater — performance with oyster shells is a demonstration item
High purity
Aiming for high-purity products using C-PCC refining technology
Target specifications
| Purity | ≥ 97% (ultra-high-purity grade target ≥ 99%) |
| Whiteness | ≥ 95 |
| Particle size | 2 ~ 10 ㎛ adjustable |
Validation status
- Ultra-high-purity calcium carbonate test report — to be issued by Gyeongsang National University (Tongyeong)
- Feedstock expansion from oyster shells to industrial by-products (planned 2029 · 2030)
- Measured purity and whiteness will be published after test reports are obtained
Market
High-purity grades command different prices
Domestic high-purity calcium carbonate production is about 100,000 t, with high-purity grades traded at KRW 500,000–700,000 per tonne. Buyers include electronic materials, fine chemicals, food additives and pharmaceuticals, as well as functional-filler users such as PVC synthetic leather — the same group as existing C-PCC customers.
Source: CARBON-U IR materials (Oct 2026)