Chinese imports of coal from key supplier Australia slipped in November from a year ago, customs data showed, hit by heavy traffic congestion in Australian ports. Shipments from Australia fell 0.3 percent in November from the same month a year ago to 5.59 million tonnes, data from the General Administration of Customs showed on Tuesday. That compared with October’s 5.61 million tonnes. More than 300 large dry cargo ships have been waiting outside Chinese and Australian ports in a maritime traffic jam for over a month, choking supplies to the world’s second largest economy. “Demand for high-quality coal is surging as the country has imposed stringent rules to curb emissions and improve energy efficiency,” said Wang Fei, a coal analyst at Huaan Futures. High-grade coal from Australia, with lower pollutants such as sulphides and higher energy value, has seen increasing demand from utilities and industrial plants […]