Australia's South32 says quarterly coking coal production up about 16%

Jan 21 (Reuters) - Diversified miner South32 Ltd S32.AX on Thursday reported an about 16% rise in second-quarter metallurgical coal output, helped by a return to the longwall form of mining at its flagship Illawarra project. Production of the steel-making ingredient rose to 1.4 million tonnes in the December quarter,...