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Coal blending is the process of mixing coals after coal has been mined to achieve quality attributes that are desirable for the coal’s intended application (e.g. steam generation, coking).〔 Chirons, Nicholas P. ''Coal Age Handbook of Coal Surface Mining'' (ISBN 0-07-011458-7)〕 The quality attributes that are most important in blending will differ from one mine site to another and also depend on how the coal seams vary in quality and their final intended use. In thermal coals, quality attributes of interest often include ash, volatile matter, total Sulfur, and gross calorific value. For coking coals, additional attributes are sometimes considered including crucible swelling number, fluidity, and RoMax. ==Blending methodology== Blending is typically achieved through the stacking of different materials on a stockpile or within a vessel’s hatch during ship loading. Stacking methodology (e.g. Chevron, Windrow, Cone Shell, Strata) can also impact the homogeneity of the final blended material. Blending sometimes will take place prior to the Coal Handling and Processing Plant (CHPP) in order to achieve attributes (e.g. feed ash levels) that can improve CHPP production rates. Blending may take place in several locations within the demand chain including: * Before entering the processing plant * Immediately after the processing plant * Train load out * Port stockyard * Ship loading * At the customer stockyard 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Coal Blending」の詳細全文を読む スポンサード リンク
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