Ramu nickel-cobalt: a cobalt operation in Papua New Guinea
Ramu nickel-cobalt is a nickel-cobalt processing plant producing cobalt in Papua New Guinea, operated by MCC (Metallurgical Corporation of China). The sources report 3,099 tonnes contained cobalt in MHP for CY2025; the basis is the whole operation. In cobalt content, whole-operation output for CY2025 is 3,099 tonnes: about 1% of world cobalt output in 2025; it is one of 4 operations on this site whose output can be stated in cobalt content.
Who owns and operates it?
| Owner | Interest | As of |
|---|---|---|
| Nickel 28 Capital | 8.56% | 23 February 2026 |
How much does it produce?
| Period | Output | Basis | Where in the source |
|---|---|---|---|
| CY2025 | 3,099 tonnes contained cobalt in MHP | Whole operation | p.1 highlights; operating table 'Contained Cobalt (tonne)' Full Yr 2025 · Nickel 28 Capital Corp. |
| CY2024 | 2,625 tonnes contained cobalt in MHP | Whole operation | p.1 highlights; operating table Full Yr 2024 · Nickel 28 Capital Corp. |
Between CY2024 and CY2025 the reported figure rose by 18.1%, in the same unit and on the same basis.
How the cobalt-content figure is worked out. Nickel 28 reports 3,099 tonnes of contained cobalt in mixed hydroxide precipitate for the whole operation. World mine production of cobalt in 2025 was 310,000 tonnes (USGS Mineral Commodity Summaries 2026).
USGS's 2025 estimate for Papua New Guinea is lower than the reported figure, so no share of the country's output is computed.
Status: operating in CY2025.
- The figure comes from Nickel 28's release, as an 8.56% holder; the release calls its figures unaudited and preliminary.
How does it compare?
Other cobalt operations on this site: Tenke Fungurume and Kisanfu (CMOC), Kamoto Copper Company (KCC), Mutanda, Huayue Nickel Cobalt, Moa joint venture, Murrin Murrin. See where cobalt comes from for the country totals, the country page for Papua New Guinea.
Sources
- Nickel 28 Capital Corp.: Nickel 28 Releases Ramu Q4 and Full Year 2025 Operating Performance (news release (23 February 2026), Q4 and CY2025). Opened 3 November 2026; used: pp.1-2.
- U.S. Geological Survey: Mineral Commodity Summaries 2026: Cobalt (government statistical summary, 2025 (world and country mine production)). Opened 3 November 2026; used: world and country mine production table.
Method and limits
- Reported, not estimated. Output is the figure the operator or owner published, in the unit it used. This site does not estimate output where none is published.
- Shares. A share divides output in cobalt content by the USGS world or country total for 2025. Where the operator's year is a fiscal year or the unit is a concentrate or a carbonate equivalent, the share is approximate or not given.
- Whole operation or owner's share. The basis column says which. A joint venture's output is never counted twice.
- Partial list. Only operations with a published figure are listed, so the rank is among those on this site, not among every cobalt mine. Shares of a country's output mix periods and bases, so treat them as indicative.
- Made with AI assistance, checked against sources. The facts were gathered from the documents above by AI-assisted research and re-checked against those documents by a second, independent pass; the page text is generated from the data. No professional review took place. How the site is made. To report an error, contact us; fixes are logged on the corrections page.