The Indonesian policy that gets read abroad is the export ban. The part that decides what the country can actually produce is the plant behind it — and that plant is now large enough to be counted unit by unit in the government's own publications.
This article assembles that industrial footprint from two official documents rather than from the announcements around it: the Indonesia Minerals Yearbook 2024, published in December 2024 by the Center for Mineral, Coal and Geothermal Resources at the Geological Agency of the Ministry of Energy and Mineral Resources (ESDM), and the U.S. Geological Survey's 2023 Minerals Yearbook chapter for Indonesia, issued as an advance release in June 2025. Where the two documents count the same fleet differently, both numbers are given, because the difference is itself information.
The roadmap the capacity is being built against
The programme has a formal horizon. Under the National Industrial Development Plan (RIPIN) 2015–2035, the government set out a Downstream Processing Minerals Roadmap for 2023–2045, attributed in the yearbook to the Coordinating Ministry for Maritime Affairs and Investment. Its stated objectives are to raise domestic refining capacity and cut reliance on raw mineral exports; to expand electric-vehicle battery and renewable-energy material production through investment in nickel, lithium and cobalt refining; and to build advanced metallurgical and alloy industries for automotive, aerospace and construction demand. The commodities the roadmap names are iron, copper, tin, bauxite, gold, silver and nickel.
The legal hook is Law No. 3 of 2020, which amended Law No. 4 of 2009 on Mineral and Coal Mining — the same statute chain that produced the export prohibitions. The yearbook also records the two classification decrees that decide which commodities the programme is aimed at: Decree No. 296.K/MB.01/MEM.B/2023, which classifies 47 mineral commodities as critical, and Decree No. 69.K/MB.01/MEM.B/2024, which identifies 22 mineral commodities as strategic.
The yearbook reproduces the Ministry of Industry's product ladder for the base-metal industry, which is a clearer statement of intent than the policy language. Stage I of RIPIN (2015–2019) is the smelter stage — smelter-grade and chemical-grade alumina, aluminium billet and slab, nickel matte, copper cathode, nickel hydroxide, iron-nickel sponge. Stage II (2020–2024) moves to alloy and intermediate products, including mixed hydroxide precipitate (MHP) and mixed sulphide precipitate. Stage III (2025–2035) is the downstream manufacturing stage: nickel sulphate, electrolytic nickel and nickel chloride, advanced aluminium alloys, and copper wire for electrical and electronic components.
That ladder is the reason capacity counts matter. Each stage is a customer for the stage before it, and a project that stops at Stage I is producing a commodity, not a supply chain.
Copper: three smelters, a one-million-tonne target
Copper is where the pipeline is closest to complete. The yearbook states that Indonesia is set to operate some of the largest cumulative copper cathode facilities globally, led by three world-class smelter companies: PT Smelting, PT Freeport Indonesia and PT Amman Mineral Industri. On that basis it projects copper cathode production capacity reaching 1 million tonnes a year, and cites a 2023 Bloomberg Technoz article for the claim that this would make Indonesia the world's largest copper cathode producer.
USGS records what was physically happening in 2023 while that projection was being made:
| Project | Detail as recorded by USGS | Status at December 2023 |
|---|---|---|
| PT Freeport Indonesia — Manyar smelter, Gresik, East Java | Designed to process 1.7 million tonnes a year of copper concentrate; estimated construction cost US$3.0 billion | 90% complete; completion expected May 2024 |
| PT Amman Mineral Industri — copper smelter, West Sumbawa, West Nusa Tenggara | Construction under way | Progress had passed 50% before the June 2023 export ban |
| PT Smelting Co. — smelter and refinery, Gresik | Recorded annual capacity 350,000 tonnes | In operation |
Because both the Manyar and Amman smelters had passed 50% construction before the government's June 2023 ban on raw mineral exports, their owners were granted licences to keep exporting copper concentrate and anode mud through May 2024. That exemption window is the clearest example of the policy bending to the construction schedule rather than the other way round.
The ore side is the constraint. The yearbook, citing the Geological Agency's December 2023 mineral resources and reserves balance, puts Indonesian copper at 2.8 billion tonnes of ore and 21.4 million tonnes of contained copper metal; USGS's 2024 estimate, quoted alongside it, is 28 million tonnes of copper metal. At current extraction rates the yearbook projects the 2.8 billion tonnes of ore depleted within 22 years, by 2044.
Domestic demand for the cathode exists but is small next to the coming output. The yearbook attributes the 2022 rise in domestic cathode consumption to copper wire manufacturers, naming PT Karya Sumiden Indonesia, PT Tembaga Mulia Semanan and PT Kabel Metal Indonesia, and notes that local downstream industries had not yet absorbed locally produced cathode, with exports going mainly to Thailand, Malaysia and Vietnam.
Nickel: 131 units in the pipeline, and nine years of high-grade ore
Nickel is the largest build-out and the most contested. The yearbook's count, as of 2024, is 131 nickel smelters under development — 110 pyrometallurgical and 21 hydrometallurgical — spanning operational, under-construction and planned facilities.
| Route | In operation | Under construction | Planned | Total units | Ore demand (million t/yr) |
|---|---|---|---|---|---|
| Pyrometallurgy (saprolite, Ni >1.5%) | 45 | 37 | 28 | 110 | 387.2 |
| Hydrometallurgy (limonite, Ni <1.5%, HPAL) | 5 | 3 | 13 | 21 | 105.0 |
| Total | 50 | 40 | 41 | 131 | 438.3 |
Pyrometallurgical smelters produce ferronickel and nickel pig iron for stainless steel; hydrometallurgical plants use high-pressure acid leaching (HPAL) on low-grade limonite to make battery-grade intermediates. The fleet's projected appetite is 438.3 million tonnes of ore a year — of which 387.2 million tonnes would be saprolite.
Against that demand, the yearbook runs the arithmetic on reserves and does not soften it. Saprolite reserves of 3,222 million tonnes at above 1.5% nickel, against 387.2 million tonnes a year of demand, imply roughly nine years of life, to about 2032. Limonite reserves of 1,674 million tonnes, against 105 million tonnes a year, imply around 17 years, to 2040. The yearbook's own framing is that the disparity has prompted calls for policy intervention: controlling the pace of pyrometallurgical smelter development and improving ore utilisation.
For scale, the yearbook records Indonesia extracting 176 million tonnes of nickel ore in 2023, supporting about 130 operational nickel smelters, and puts total nickel resources at 184.6 million tonnes of contained nickel with reserves of 56.1 million tonnes, of which 37.5 million tonnes (67%) grade above 1.5% nickel.
USGS, working from 2023 data, counts the same fleet differently: 44 Class II pyrometallurgical smelters consuming 210 million tonnes a year of saprolite, with 25 more under construction and 28 planned requiring a further 200 million tonnes a year; and three Class I HPAL plants consuming almost 24 million tonnes a year of limonite, with six under construction and ten planned. The two documents also record the same policy response — that the ministry was planning to restrict new Class II capacity to slow the depletion of high-grade ore.
The plant-by-plant list of that fleet, route by route, is set out in our earlier piece on [nickel smelters in Indonesia](/en/news/nickel-smelter-indonesia).
Bauxite and alumina: eight refineries still being built
Bauxite shows the programme's gap between intent and completion. USGS records that the ministry had expected all bauxite downstream projects to be finished before the June 2023 export ban took effect, but that eight alumina refineries and aluminium smelters were still under construction in 2023. The reason given was cost: the Association of Indonesian Bauxite and Iron Ore Business estimated the average construction cost of an aluminium smelter at about US$1.2 billion, above that of a nickel smelter.
The resource base is not the problem. The yearbook, citing USGS 2023, puts Indonesian bauxite ore reserves at 2.8 billion tonnes, about 9% of world resources of 31.3 billion tonnes. The country's own 2023 mineral resources balance records 7.5 billion tonnes of crude bauxite resources, of which 3.8 billion tonnes is washed bauxite, alongside 1.2 billion tonnes of alumina resources and 531.4 million tonnes of alumina reserves.
On the yearbook's own assumption — all bauxite smelters running at full capacity in 2024 and production continuing at 41.3 million tonnes a year — the 2.8 billion tonnes of reserves would last until 2092. Bauxite is the commodity where the constraint is capital and construction time, not geology.
Battery intermediates: nickel sulphate
The battery chain's first Indonesian plant is recorded by USGS. PT Halmahera Persada Lygend completed a nickel sulphate plant on Obi Island, South Halmahera, in May 2023 — the country's first and, on USGS's description, the world's largest, with capacity of 240,000 tonnes a year of nickel sulphate containing 54,000 tonnes a year of nickel, the main component in the precursor of EV battery cathodes.
Two years earlier that product did not exist in Indonesia at all. It is the clearest single measure of how fast the hydrometallurgical end of the fleet has moved.
Lead and zinc: the smallest line, and a by-product
Lead and zinc refining is the newest and smallest part of the programme. The yearbook records the PT Kapuas Prima Coal (KPC) and PT Kobar Lamandau Mineral (KLM) smelters as among Indonesia's first lead and zinc refining facilities: as of 2024 the lead smelter had been completed, while the zinc smelter was 93% complete, with an annual capacity of 30,000 tonnes of zinc ingot.
The copper smelters will add to the lead line as a by-product. The yearbook expects the Freeport Indonesia smelter in Gresik to yield 2,200 tonnes a year of lead and the Amman Mineral Industri smelter in Sumbawa 460 tonnes a year.
What this means for a project
Read together, the two documents describe a downstream programme whose economics are set by ore supply rather than by demand:
- Capacity is being added faster than reserves are being converted. The nickel chapter's own projection — nine years of saprolite at the planned burn rate — is the strongest argument that the ministry will keep tightening smelter approvals. A project whose feedstock assumption rests on high-grade saprolite is exposed to that.
- The policy has already moved twice against the constraint. The planned restriction on new Class II pyrometallurgical capacity is a supply-side rule, not a demand-side one, and it is recorded by both USGS and ESDM.
- The permitted route is the integrated one. Every commodity in the roadmap is described as a chain from mining area to refined product, and the product ladder runs to 2035. Permitting, ore supply and the offtake product are one planning problem, handled through the same documents.
- Where the plant is matters more than what it makes. The processing fleet is concentrated: Morowali and Konawe in Sulawesi, Obi Island and Weda Bay in North Maluku for nickel; Gresik in East Java and West Sumbawa for copper; West Kalimantan for alumina. Logistics and power decide project economics as much as grade does.
- A smelter without a mine is a supply risk with a permit attached. The ore-demand table above is a statement of who will be competing for the same tonnes.
Catatan Teramine
This section is Teramine's editorial analysis, not a fact reported from any source.
The publication of the 2024 yearbook is itself a signal worth reading. The Indonesian government has assembled, in English, its own audit of its downstreaming programme — including the finding that the flagship commodity has roughly nine years of high-grade ore at the pace it is building smelters to consume. That is an unusual thing for a ministry to print while still promoting the sector, and it should be treated as an invitation to build the *hydrometallurgical* and *integrated* kind of project rather than the kind the government has said it will stop approving.
For a foreign investor, the practical consequence is that the screen has moved. The question is no longer whether Indonesia wants processing capacity — it plainly does, and it has published a ladder of products it wants by 2035. The question is whether a specific project has an ore source the state will still be willing to let it consume in year ten, and whether its output sits high enough on that ladder to survive a tightening. Projects that answer both, with documents, are the ones the current policy is built to admit.
We handle permit work — IUP and IUPK applications, RKAB, the operating documents a project needs to hold — through [mining permit services](/en/layanan-izin). Indonesian mining opportunities offered for take over, joint operation and joint venture are listed on the [mining marketplace](/en/marketplace), each with its commodity, location and scheme stated.
Sources
- Ministry of Energy and Mineral Resources, Geological Agency — Center for Mineral, Coal and Geothermal Resources, *Indonesia Minerals Yearbook 2024*, December 2024. Used for: the 2023–2045 downstream processing roadmap and its commodities; the RIPIN product ladder (Table 1.1); the critical and strategic minerals decrees; the 131-unit nickel smelter pipeline, ore-demand table and reserve-life estimates (Tables 7.3 and 7.4); nickel resource and reserve figures; the three copper smelter companies and the one-million-tonne cathode projection; copper reserve figures and depletion estimate; bauxite resources, reserves and the 2092 supply projection; and the lead-zinc smelter status and by-product outputs.
- U.S. Geological Survey — *2023 Minerals Yearbook*, Indonesia (advance release), June 2025. Used for: the Manyar smelter's design throughput, cost estimate and construction progress; the Amman smelter's construction position and the copper concentrate export licences to May 2024; PT Smelting's recorded capacity; the nickel sulphate plant on Obi Island and its capacity; the Class II and HPAL fleet counts and ore consumption; the eight alumina refineries and aluminium smelters under construction and the industry cost estimate; and the planned restriction on new Class II nickel smelter capacity.
Related reading on this site: [Indonesia's mineral export ban](/en/news/indonesia-mineral-export-ban), [nickel smelters in Indonesia](/en/news/nickel-smelter-indonesia), and [critical minerals in Indonesia](/en/news/critical-minerals-in-indonesia).
