National Aluminium Company (NALCO) is India’s largest integrated aluminium producer - a government-owned enterprise that turns bauxite from its own mines into alumina and then into aluminium metal, all powered by its own coal-fired and renewable electricity. It was incorporated in 1981 to unlock the value of Odisha’s vast bauxite deposits, which hold over half the country’s reserves, and it has since built a fully captive chain from mine to smelter that makes it one of the lowest-cost producers of bauxite and alumina in the world. The recurring logic is vertical integration: every major input - raw ore, intermediate alumina, power, and coal - is supplied in-house, insulating the company from the price swings that hurt competitors who must buy these on the open market.
Business segments
Three engines built on a single captive resource chain - mining feeds refining, refining feeds smelting, and surplus alumina is sold abroad - with a fourth engine of renewable power layered on top.
1. Alumina: the low-cost commodity that funds everything else
NALCO refines bauxite into alumina at one of the world’s cheapest cost positions, selling most of it overseas and using the rest to feed its own smelter.
- Cheaper raw materials than rivals - the refinery at Damanjodi sits right next to the captive Panchpatmali bauxite mines, with ore delivered on a 14.6 km covered conveyor belt rather than by truck, cutting both cost and dust. The mines are 98% blast-free and hold a 5-Star rating from the Indian Bureau of Mines, so extraction is both cheap and compliant.
- A global cost leader - Wood Mackenzie rated NALCO one of the lowest-cost producers of alumina globally in 2019, a position built on owning the bauxite rather than buying it. That cost advantage means the refinery stays profitable even when alumina prices fall.
- Mostly exported, mostly on spot - in FY26, export sales of alumina were 1,064.6 thousand tonnes against just 41.4 thousand tonnes sold domestically, with most moved through monthly spot tenders rather than long-term contracts. This lets NALCO capture high spot prices when markets are tight, though it also means revenue swings with the Alumina Price Index, which is quoted as a percentage of the London Metal Exchange aluminium price.
- Growing bigger - a fifth refinery stream adding 1 million tonnes per annum of capacity was starting commissioning in June 2026, and a new mine at Pottangi (111 million tonnes of reserves, 3.5 million tonnes per year) was opening around May 2026 to feed it. In FY26, alumina production grew roughly 11.5% and sales roughly 30.7% over the prior year.
2. Aluminium metal: the smelter that turns captive alumina into premium products
The Angul smelter runs on alumina from the company’s own refinery and power from its own coal plant, producing metal that sells mostly to Indian buyers at a premium over standard ingot.
- Full-pot operation unlocked - the smelter has 960 pots with an installed capacity of 460,000 tonnes per year, and in FY22 it ran all of them for the first time, hitting its highest-ever cast metal production of 4.6 lakh tonnes. In FY26, total metal sales reached 4.74 lakh tonnes, another record.
- Power is the biggest cost, and it is captive - the smelter draws roughly 900 MW, of which about 700 MW comes from the company’s own 1,200 MW captive power plant at the same site, with only about 200 MW bought from outside. Aluminium smelting is essentially solidified electricity, so owning the power plant is what makes the metal business viable.
- Moving up the value chain - beyond standard ingots, NALCO sells wire rods (at a premium of about ₹10,000 per tonne over ingots) and rolled products (at a premium of ₹30,000-35,000 per tonne), with a rolled-product unit producing about 2,000 tonnes a month and expanding to 3,000 tonnes from March 2026. It also launched a high-performance silicon-based casting alloy for automotive and electrical applications.
- Domestic-first sales - in FY26, domestic aluminium sales were 454.6 thousand tonnes against just 6.1 thousand tonnes exported, and pricing is linked to the LME cash settlement price with no preferential deals for any customer. The company sells direct to industrial buyers through MoUs and tenders, with no dealer network.
3. Captive power and coal: the energy backbone
A 1,200 MW thermal plant fuelled by the company’s own coal mines supplies the smelter’s electricity, with surplus power sold to the state grid.
- Captive coal production is ramping up - the amalgamated Utkal coal block has a mining lease valid until 2051 and a capacity of 4 million tonnes per annum, and in FY26 coal production jumped roughly 42% over the prior year. The more coal NALCO mines itself, the less it pays market prices for fuel.
- Ash is fully used - a Lean Slurry Project commissioned in October 2021 ensures 100% utilisation of ash from the power plant, removing a disposal liability.
- Expansion is coming - a new 1,080 MW captive power plant is planned with commissioning likely in June 2031, alongside a brownfield smelter expansion of 0.5 million tonnes per year.
4. Renewable energy: a small but growing green layer
NALCO operates 198 MW of wind farms across four states, selling the power to state DISCOMs and earning renewable-energy certificates.
- Wind farms in four states - the portfolio spans Andhra Pradesh (50.4 MW), Rajasthan (97.6 MW across two sites), and Maharashtra (50.4 MW), generating 307 million units in FY26, about 9% more than the prior year.
- Paid by the grid - revenue comes from energy transmitted to DISCOMs at notified prices under power purchase agreements, plus incentive income from renewable energy certificates. This is a separate, steady revenue stream rather than power that feeds the smelter directly.
- Modest additions in the pipeline - another 15 MW of wind and 7 MW of rooftop solar are planned, adding to the existing 1,060 KWp of rooftop solar already on office buildings.
Group structure and partners
NALCO is a standalone company with no subsidiaries, but it holds stakes in four joint ventures - one already supplying a critical raw material, one building a downstream aluminium park, and one hunting for lithium overseas.
- GNAL supplies caustic soda - a 40% stake in a joint venture with Gujarat Alkalies and Chemicals that runs a 2.7 lakh tonne-per-year caustic soda plant in Gujarat, with supply flowing to NALCO’s refinery since August 2022. Caustic soda is the refinery’s key input, so this is direct input security.
- Angul Aluminium Park feeds downstream industry - a 49% stake with IDCO to promote aluminium product manufacturing in Odisha, with NALCO committed to supplying 50,000 metric tonnes of hot metal and ingots to units in the park.
- KABIL is the lithium bet - a 40% stake alongside Hindustan Copper and MECL in a venture focused on critical minerals overseas. In January 2024, KABIL signed a deal with Argentina’s CAMYEN SE for exploration and exclusive rights over five lithium brine blocks covering about 15,703 hectares in Catamarca province, with rights to commercial production if lithium is found. It is also pursuing projects in Australia and has signed cooperation agreements with CSIR labs, Oil India, ONGC Videsh, and a UAE-based resources firm.
- One venture wound down - Utkarsha Aluminium Dhatu Nigam, a 50:50 associate with MIDHANI for a high-end aluminium alloy plant, was discontinued by board decision.