TeachMeFinance.com - explain Ash
Ash The term 'Ash' as it applies to the area of energy can be defined as ' Impurities consisting of silica, iron, alumina, and other noncombustible matter that are contained in coal. Ash increases the weight of coal, adds to the cost of handling, and can affect its burning characteristics Ash content is measured as a percent by weight of coal on an 'as received' or a 'dry' (moisture-free, usually part of a laboratory analysis) basis'.
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