State-owned aluminium maker National Aluminium Co Ltd (Nalco), which cut up to eight per cent capacity last year, will shut more over the next fortnight.

“We are looking to shut down three-four per cent capacity, as the prices of imported and e-auctioned coal are unviable,” said B L Bagra, director (finance), Nalco. Aluminium requires huge quantities of power, generated by burning coal. Close to 12 per cent of Nalco’s coal requirement is met through imports and e-auction and the rest is supplied by state-run miner Coal India Ltd.