煤依然是澳大利亚矿产中最主要的出口品种，昆士兰出产约占全世界三分之一量的各类炼钢用焦炭产品。
Coal is still Australia's main minerals export, and Queensland produces about a third of the world's coking variety, the kind used to make steel.
通过对多品种煤进行化验、计算和优化，分析了其特性指标之所以差异很大的原因。
The test, calculation and optimization are carried out for various coals and the reasons caused different performance index of them are analyzed.
指出通过块煤选矸系统的技术改造，能生产出优质畅销的动力煤品种，使经济效益达到最佳状态。
The paper points out that only by reforming the picking gangue system, the best-selling quality power coal series can be produced and the optimum economic benefit be achieved.
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