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steaming and coking coal

Mar 01, 1979018332High quality steaming coal may have twice the calorific value per unit mass of the lowest marketable quality, while the level of impurities, including sulphur, ash and moisture may vary from 5 to 25.3 Marketable qualities of coking coal may have a volatile matter content ranging between 10 and 40, and the range of other quality ...

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