lx groupLX International, the trading arm of South Korea's LX Group, said Tuesday it will buy a major stake in a nickel mine in Indonesia as it pushes to expand its resources business.LX International, unit perdagangan LX Group Korea Selatan, akan membeli 60% saham di PT Adhi Kartiko Pratama (AKP), perusahaan tambang nikel di Pulau Sulawesi,