Kazakhmys, the world's 10th largest copper miner, was confident the long-term outlook for copper remained positive as a surge in prices drove its full-year profit higher. Kazakhmys said on Thursday its 2010 earnings before interest, tax, depreciation and amortisation (EBITDA) rose 59.5 percent to $1.93 billion. According to Thomson Reuters I/B/E/S estimates, the average EBITDA forecast stood at $1.86 billion.