On the second day of coal auction, Hindalco Industries today walked away with a coal mine in Jharkhand. Coal Secretary Anil Swarup confirmed the development saying that Kathautia mine goes to Hindalco for 30 years at 6,800 crore rupees. GMR and Reliance Cement bagged one mine each yesterday for an estimated 1,375 crore and 798 crore rupees respectively.