The government had earlier hired consultants to scout for locations for establishing a five lakh tonnes greenfield aluminium smelter and a power plant, where energy is available at competitive prices, a source said.
"Based on the study conducted by the consultants, Nalco has identified Oman and Indonesia. Iran is another country that has come up after the US lifted sanctions against it. Nalco CMD T K Chand also met top Iranian officials last month over this," the source added.
Another point is that all the three countries are closer to India in terms of shipping routes and bauxite from mines in India can be shipped to the plant locations in these countries at competitive logistics cost, he added.
Indonesia, among the top 10 gas producing nations with an estimated output of 74 billion cubic meters, has the third largest gas reserves in Asia Pacific (after Australia and China), accounting for about 1.5 per cent of the total global gas reserves, the official said.
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The state-owned firm is looking at the feasibility of setting up such a plant in the Chabahar Free Trade Zone (FTZ) in the Islamic nation.
It takes around USD 1,500-1,700 to produce one tonne of aluminium, with alumina and power accounting for 40 per cent each of the cost and raw materials and others contributing the remaining 20 per cent.
The Navratna firm and Iran's Industries Ministry has set up a task force to deliberate on the proposed smelter and gas-based power plant and come out with a feasibility report by July this year.