Jigging technology is the grand ole man in coal preparation. Until the commercialization of the dense medium process, it was the backbone of coal washing. Today jigging machines beneficiates approximately 20-25 percent of the washed coal in the U.S. Agricola wrote about jigging in the 1500's. Sometimes, jig washing is presented as old technology implying that it is not suitable for the requirements of today's coal industry. Today it still represents one of the important devices in the coal preparation engineer's toolbox. Most Preparation Engineers have always believed that cleaning with wet jigs is a cheaper alternative than cleaning with heavy media. But in practice is this really true? Historical operating cost data is provided for cleaning plants that employ both heavy media and Baum jigs. This study provides actual cleaning cost that was realized with each cleaning circuit design inside the plant building. Cost associated with outside activities is excluded from the cost study.
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