(Reuters) - Kaz Minerals on Thursday reported record copper production in the third quarter as it ramped-up operations at its biggest mines in Kazakhstan, putting it on track to achieve full-year targets for copper output.The London-listed miner said copper production for the quarter ended Sept. 30 rose 7.4% to 82.9 kilo tonnes (kt).Copper production also handily topped Jefferies estimates of 76.1 kt, as output at its open pit mine Bozshakol benefited from an increase in ore throughput and..