Abstract

With renewed interest in coal slurry pipelines in China, Indonesia, Australia and Canada for electric generation, it appears worthwhile to update the relative economics of transporting coal by slurry pipeline. Three slurry pipeline technologies are evaluated for the commercial transportation of 3.0, 6.0, and 9.0 million tonnes per year (MMTA) example cases, over distances of 250 km, 500 km and 1000 km. The three methods investigated in this report are: (1) Conventional concentration and size-consist slurry, as used on the Consolidation Coal and Black Mesa slurry pipelines, and evaluated extensively in the ETSI program. (2) Stabilized slurry, finer and of higher density than conventional slurry - but without substantial additives - tested on a commercial scale in the Consolidation Coal pipeline. (3) High density coal slurry, referred to in this report as coal water mixture (CWM), which has been tested in pilot plants and the commercial Belovo-Novosibirsk pipeline. A sensitivity analysis was carried out for each alternative to determine the effect of pipeline capacity and distance on delivered costs. A brief summary for the 6.0 million tonnes per year, 500 km pipeline system is shown. The comparison of the delivered products, with their respective heat penalties on boiler efficiency ismore » also shown.« less

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