Coal India’s (CIL) grade slippage during the third quarter of the financial year was down to 34 percent compared to 41 percent during the same period last year. Grade slippage implies that the fuel’s grade during the sampling is found inferior than the declared grade. CIL’s coal is divided into 17 grades. Each grade of coal depending on its heat content is assigned a Gross Calorific Value (GCV). If any reduction is found in the GCV of a particular grade of coal supplied then it is termed as ‘grade slippage’.
Coal India is the world’s largest coal mining company. It also produces non-coking coal and coking coal of various grades for diverse applications.
